ABBOTT Seamount
31 48'N - 174 18'E
5.06
* (November 1982)
ABRAHAM Canyon
52 37'N - 172 20'E
813
*
ABROLHOS Bank
18 30'S - 38 30'W
5.12
ABROLHOS Ridge
18 00'S - 37 00'W
202
ADAK Canyon
51 25'N - 177 05'W
ADAMS Seamount
50 01'N - 176 14'W
50-813
ADARE Seamounts
70 10'S - 171 50'E
5.14, 5.18
ADELAIDE Bank
6 35'S - 56 47'E
70-71-73-702-703
INT Charts: (ED-1879)
ADMIRAL ZENKER Seamount :
See ZENKER Seamount
AEGIR Ridge
64 50'N - 6 15'W to 67 30'N -  2 00'W
5.04, 5.17
* (December 1983)
AFANASY NIKITIN Seamount
3 00'S - 83 10'E
5.09
70-71-73
* = NIKITIN Seamount
AFRICANA Rise
46 00'S - 42 30'E
70-72
* = Bank
AFRICANA Seamount
37 15'S - 29 10'E
21-70-72-204
* = AFRICANA Seamount
AGADIR Canyon
30 40'N - 11 00'W
5.08
AGASSIZ Fracture Zone
40 30'S - 138 00'W to 38 00'S - 125 00'W
5.11
AGATTU Canyon
52 23'N - 172 35'E
AGERHOLM Seamount
34 25'N - 135 35'W
50-51
AGRIA Bank
16 30'N - 72 05'E
705
AGUILAS Seamount
37 15'N - 0 42'W
301
AGULHAS Bank
35 20'S - 20 45'E
204
AGULHAS Basin
46 S - 10 E to 46 S - 30 E
5.09, 5.16
AGULHAS Plateau
40 00'S - 26 00'E
21-22-70-72-204
AGULHAS Ridge
43 30'S -  7 00'E to 37 00'S - 18 30'E
5.12, 5.16
21-204
Formerly CAPE Rise
AKADEMII NAUK Rise
49 30'N - 150 00'E
5.02
511
* and INT 511 = A.N.Rise
AKTIVNESET
62 28'N - 3 38'E
101
Continental slope
ALAGOAS Seamounts
9 45'S - 34 15'W
202-215
ALASKA Plain
55 00'N - 143 00'W
50-810
ALASKA:
*see GULF OF ALASKA Seamount Province
ALBATROS Bank
22 50'N - 84 15'W
402
ALBATROS Plateau
10 00'N - 103 00'W
51-802-811
* = ALBATROSS
ALBATROSS Bank
56 10'N - 152 20'W
810
17 42'N - 75 40'W
400-402
* (November 1986)
ALBORAN Basin
35 50'N - 4 30'W to 36 25'N - 1 50'W
ALDEN Seamount
49 05'N - 158 45'W
50
ALEUTIAN Basin
57 00'N - 180 00'
5.02, 5.03
50-813-814
ALEUTIAN Ridge
51 30'N - 178 00'W
ALEUTIAN Rise
50 15'N - 175 00'E
* (December 1985)
ALEUTIAN Terrace
50 40'N - 179 00'W
ALEUTIAN Trench
54 00'N - 166 30'E to 54 00'N - 158 30'W
ALEXA Bank
11 35'S - 175 20'E
604
ALEXANDER Seamount
18 57'N - 153 28'W
809
ALGERIAN Basin
37 30'N - 2 00'E
5.05
* GEBCO-SCGN/7
ALGERIAN-TYRRHENIAN Trough
38 20'N - 9 35'E
ALGOL Seamount
2 15'S - 84 30'W
811
* (April 1984)
ALICE Shoal
16 05'N - 79 22'W
400-401-402-811
ALIDADE Bank
35 44'N - 1 25'W
ALIX Seamount
17 30'S - 61 20'E
70-71-72-702
* (April 1986)
ALMIRANTE BROWN Canyon
45 25'S - 57 55'W
200
ALMIRANTE LEITE Bank
26 10'S - 35 03'E
70-72, 701
* = Knolls
ALMIRANTE SALDANHA Seamount
22 20'S - 37 35'W
20-201-202
* INT Charts = Bank
ALPHA Ridge
85 30'N - 120 00'W
5.17
* = Cordillera.
ALPHECCA Seamount
18 20'N - 117 08'W
50-51-802
ALSEK Valley
58 30'N - 139 30'W
ALTAIR Seamount
44 35'N - 33 50'W
11-13-14-103
ALULA-FARTAK Trench
13 00'N - 51 10'E to 14 50'N - 52 20'E
* GEBCO-SCGN/6
ALVARADO Ridge
5 20'S - 83 30'W
AMAMI Plateau
28 10'N - 132 10'E
509
AMAZON Canyon
3 30'N - 48 30'W
5.08, 5.12
* = Canyons.
AMAZON Cone
4 30'N - 46 45'W
12-216
* and INT 12 = Fan. GEBCO : should be Fa
AMEGHINO Canyon
43 20'S - 57 20'W
AMERICA-ANTARCTIC Ridge
60 15' - 20 00'W to 56 00'S -  4 30'W
5.16
AMERICA :
See LITTLE AMERICA Basin, MIDDLE AMERICA Trench.
AMERY Basin
68 15'S - 74 30'E
5.13
AMIRANTE Bank
5 45'S - 53 15'E
AMIRANTE Basin
7 00'S - 54 30'E
702-703
AMIRANTE Trench
8 00'S - 52 40'E
701-702
AMLIA Basin
52 30'N - 173 00'W
AMLIA Canyon
52 54'N - 173 15'W
AMLIA Knoll
53 05'N - 173 53'W
AMPERE Seamount
35 05'N - 12 55'W
11-12-14-103-104
AMUKTA Canyon
53 10'N - 171 45'W
AMUNDSEN Abyssal Plain
65 00'S - 125 00'W
5.15, 5.18
AMUNDSEN Basin
87 00'N -  10 00'W to 82 00'N - 130 00'E
AMUNDSEN Ridges
69 15'S - 123 00'W
AMUNDSEN Trough
70 30'N - 123 00'W
5.03, 5.17
* (January 1985)
ANDAMAN Basin
10 30'N - 94 30'E
5.05, 5.06
706
ANDAMAN-NICOBAR Ridge
12 00'N - 93 00'E
ANDREW BAIN Fracture Zone
51 00'S - 28 52'E to 41 00'S - 35 21'E
GEBCO-SCGN/6
ANDREW Tablemount
6 45'N - 50 30'E
71-72, 703
ANGOLA Abyssal Plain
12 45'S - 2 00'E
* = Plain
ANGOLA Basin
9 00'S - 3 00'E to 21 00'S - 1 00'E
14-21-22-203-204-209
ANIMAL Basin
31 20'N - 117 35'W
802
ANNA DE KONINGH Seamount
53 22'S - 24 59'E
ANTALYA Canyon
36 40'N - 30 45'E
* (September 1984)
ANTARCTIC Canyon
71 30'S - 41 15'W
5.18
ANTARCTIC :
See PACIFIC-ANTARCTIC Ridge
ANTARES Bank
45 11'S - 49 46'E
ANTIALTAIR Seamount
43 35'N - 22 25'W
11-14-103
ANTON BRUUN Ridge
9 00'S - 52 30'E
ANTON DOHRN Seamount
57 25'N - 11 10'W
5.04
11-14-102
APPLEQUIST Seamount
55 25'N - 142 45'W
APUUPUU Seamount
18 34'N - 155 28'W
AQUARIUS Seachannel
48 15'N - 157 15'W to 53 00'N - 155 20'W
5.03
ARABIAN Basin
12 00'N - 65 00'E
71-72-73-703-705
ARAFURA Shelf
10 00'S - 135 00'E
5.10
ARCTIC MID OCEAN Ridge
GEBCO-SCGN/7, see GAKKEL Ridge
ARENA Canyon
38 58'N - 124 07'W
801
ARGENTINE Abyssal Plain
47 00'S - 53 30'W to 48 00'S - 46 00'W
20-201
* = Plain, GEBCO-SCGN/7
ARGENTINE Basin
43 00'S - 43 00'W
22-200
ARGENTINA Rise
42 00'S - 47 30'W
ARGENTINA Seamount
37 40'S - 18 10'E
21-22-72-204
ARGO Bank
23 15'S - 159 30'E
60-602
ARGO Fracture Zone
16 00'S - 63 00'E to 11 00'S - 69 00'E
ARGO Plain
14 30'S - 116 00'E
ARGUELLO Canyon
34 21'N - 121 05'W
ARGUELLO Terrace
34 30'N - 120 55'W
ARROWSMITH Bank
21 05'N - 86 28'W
400-401
ARUBA Gap
13 45'N - 72 00'W
12-13-400-402
ARU Basin
5 30'S - 133 45'E
ASCENSION Fracture Zone
7 45'S - 18 30'W to 6 00'S - 8 15'W
ASHTON Seamount
38 00'N - 13 20'W
103
ASQUITH Bank
8 45'S - 47 10'E
GEBCO-SCGN/6 = replaces WILKES Rise
ASTERIAS Seamount
38 54'N - 65 18'W
403
ASTORIA Canyon
46 15'N - 124 30'W
ASTORIA Fan
45 15'N - 126 15'W
5.07
50-801
ASTRID Ridge
68 00'S - 11 30'E
5.16, 5.18
* (June 1987)
ATKA Basin
51 20'N - 174 00'W
ATKA Seamount
50 16'N - 175 10'W
ATLANTIC :
See MID-ATLANTIC Ridge & NORTHWEST ATLANTIC MID-OCEAN Channel
ATLANTIS Fracture Zone
30 45'N - 45 30'W to 29 00'N - 37 00'W
ATLANTIC Seamount
34 05'N - 30 15'W
11-12-14
ATLANTIS II Fracture Zone
29 30'S - 57 30'E to 37 00'S - 57 15'E
ATWATER Valley
27 30'N - 87 30'W
AURORA Canyon
65 00'S - 49 30'W
AUSTRAL Fracture Zone
20 30'S - 130 00'W to 18 30'S - 123 00'W
AUSTRALIA :
See NORTH AUSTRALIA Basin and SOUTH AUSTRALIA Basin
AUSTRALIAN-ANTARCTIC Basin
58 00'S - 115 00'E to 58 00'S - 135 00'E
* = SOUTH INDIAN Basin GEBCO-SCGN/7
AUSTRALIAN-ANTARCTIC Discordance
49 00'S - 124 00'E
5.14
AVENZOAR Bank
36 30'N - 2 22'W
AVES Ridge
13 00'N - 63 30'W
AZORES-BISCAY Rise
43 30'N - 17 30'W
AZORES :
See EAST AZORES Fracture Zone.
BAGRATION Seamount
15 28'S - 6 27'W
203
GEBCO-SCGN-1988
BAHAMA Ridge
30 00'N - 75 25'W to 26 30'N - 74 40'W
BAHAMA :
See GREAT BAHAMA Bank
BAHIA BLANCA Canyon
41 25'S - 55 25'W
BAHIA Seamounts
14 25'S - 32 15'W
20-202-215
BAILEY :
See OUTER BAILEY Bank and LOUSY Bank
BAILEY'S :
See BILL BAILEY'S Bank
BAIRD Seamount
16 15'N - 162 20'W
* = Seamounts.
BAJA CALIFORNIA Seamount Province
26 00'N - 124 00'W
BAKER Seachannel
54 34'N - 137 15'W
BALANUS Seamount
39 25'N - 65 23'W
403-404
BALI Basin
7 45'S - 115 45'E
5.09, 5.10
BALLENY Seamounts
65 40'S - 161 45'E
BANDA :
see NORTH BANDA Basin and SOUTH BANDA Basin.
BANDERAS Canyon
20 30'N - 105 46'W
BANZARE Bank
58 50'S - 77 00'E
* = Seamounts
BARANOF Seachannel
55 00'N - 137 30'W
BARBADOS Basin
12 00'N - 59 25'W
* = Trough
BARBADOS Ridge
12 45'N - 59 35'W
BARCOO Bank
32 35'N - 156 15'E
* = Tablemount, INT Charts = Seamount
BARDIN Seamount
13 55'S - 53 40'E
BARENTS Abyssal Plain
85 00'N - 40 00'E
BARONIE Seamounts
40 35'N - 10 15'E
301-302
BARRACUDA Ridge
16 20'N - 57 15'W
BARREN Ridge (or BARREN-NICOBAR Ridge or BARREN ISLAND Ridge)
12 15'N - 93 30'E
BASSAS DE PEDRO
13 00'N - 72 25'E
72-73-705
Bank
BATAVIA Seamount
25 40'S - 100 30'E
70-73-708
BAUER Basin
10 00'S - 101 00'W
BAUER Fracture Zone
14 40'S - 101 30'W to 15 00'S - 98 00'W
BAUER Scarp
10 00'S - 104 45'W
BEAN Seamount
52 15'N - 147 00'W
BEAR Seamount
39 55'N - 67 25'W
12-13-403-404
BEATA Ridge
16 00'N - 72 30'W
BELEM Ridge
0 20'N - 41 00'W
12-13
BELGICA Bank
78 15'N - 12 30'W
BELGRANO :
See GENERAL BELGRANO Bank
BELLINGSHAUSEN Abyssal Plain
63 00'S - 85 00'W
BELLINI Seamount
32 42'N - 163 11'W
BELLONA Gap
40 00'S - 165 45'E
BENGAL Fan
17 00'N - 89 00'E to  6 00'N - 85 00'E
* = GANGES Fan GEBCO-SCGN/7
BERGEN Bank
60 00'N -  2 30'E
BERING Canyon
54 08'N - 168 15'W
BERLANGA Ridge
8 30'N - 95 00'W
* = Rise GEBCO-SCGN/63
BERLIN Seamount
32 51'N - 166 00'W
BERMUDA Rise
32 40'N - 62 30'W
11-12-13-400-403
BETTY Guyot
29 20'S - 174 00'E
BIGHT Fracture Zone
57 00'N - 35 30'W to 56 45'N - 30 00'W
BILL BAILEY'S Bank
60 35'N - 10 20'W
* = BILL BAILEYS
BISCAY Abyssal Plain
45 30'N -  7 00'W
BISHOP Seamount
18 50'N - 159 02'W
50-51-809
BIZET Seamount
32 16'N - 161 38'W
BJORNOYA Bank
75 20'N - 21 00'E
10
* = SPITSBERGEN Bank, INT Charts = SPITSBERGEN Bank
BLACKFIN Ridge
26 00'N - 159 00'W
BLAKE Escarpment
28 30'N - 76 40'W
BLAKE Plateau
29 30'N - 78 30'W
BLAKE Ridge
31 15'N - 74 45'W to 28 50'N - 72 45'W
* = BLAKE = BAHAMA, GEBCO-SCGN/6
BLANCO Fracture Zone
44 30'N - 130 20'W to 43 30'N - 127 30'W
BLIGH :
See  GEORGE BLIGH Bank
BLOSSOM Bank
17 51'N - 77 59'W
400-401-402-403-811
BODEGA Canyon
38 14'N - 123 35'W
801-802
BOGOROV Ridge
42 40'N - 136 20'E
* = Seamount
BOLLES Knoll
49 00'N - 157 45'W
BOLLONS Seamount
49 50'S - 176 30'W
61
* = Tablemount
BONAIRE Basin
11 25'N - 67 30'W
BONAPARTE Seamount
15 40'S -  7 00'W
21-22-203
BONE Basin
6 00'S - 121 30'E
BORCHGREVINK Canyon
70 15'S - 170 15'E
BOREAS Abyssal Plain
77 00'N -  1 00'E
BORIS KARASEV Bank
46 07'S - 83 55'W
GEBCO-SCGN/7 = subject to confirmation
BOSEI Seamount
37 08'N - 145 20'E
BOUGAINVILLE Reef
15 32'S - 147 05'E
BOUNTY Plateau
48 30'S - 179 00'E
60-600
INT Charts = Platform
BOUNTY Trough
46 15'S - 178 00'E
BOUTELLE Seamount
39 01'N - 131 05'W
50-51-801
BOUVET Fracture Zone
54 45'S - 1 00'E to 53 30'S - 3 10'E
BOWDITCH Seamount
32 44'N - 64 33'W
BOWERS Bank
54 20'N - 179 40'E
BOWERS Basin
53 30'N - 176 00'E
BOWERS Canyon
71 12'S - 173 30'E
52 50'N - 179 25'W
BOWERS Ridge
55 00'N - 176 45'E to 53 00'N - 179 30'W
BOWERS Seamount
54 05'N - 174 47'E
BOWIE Canyon
52 34'N - 179 00'E
BOWIE Seamount
53 20'N - 135 40'W
50-801-810
BOYD :
See  LOUISE A. BOYD Bank.
BRAHMS Seamount
31 09'N - 162 19'W
BRASILIAN Abyssal Plain
10 00'S - 25 00'W
201-202-215
BRATEGG Bank
64 50'S - 68 10'W
BRAZIL Basin
15 00'S - 25 00'W
12-14-21-22-201-202-215
BRIGHAM Seamount
19 08'N - 158 44'W
BRISBANE Guyot
26 55'S - 155 05'E
* = Tablemount, INT CHARTS = Seamounts
BRISTOL Canyon
54 55'N - 169 00'W
BRITANNIA Guyots
28 15'S - 155 40'E
* = Tablemounts, INT Charts = Seamounts.
BROKEN Ridge
30 45'S - 92 15'E to 32 15'S - 98 15'E
* GEBCO = Plateau
BROOKS Banks
24 05'N - 166 50'W
BROUWER Seamount
31 52'S - 109 00'E
BROWN Bank
21 30'N - 74 44'W
400-401-402-403
10 40'N - 117 15'E
507
* = Reefs
BROWN BEAR Seamount
46 01'N - 130 25'W
BROWN Seamount
55 00'N - 138 30'W
BROWN :
See  ALMIRANTE BROWN Canyon
BRUCE Ridge
60 00'S - 34 45'W to 61 15'S - 37 30'W
BRUUN :
See ANTON BRUUN Ridge
BRYAN Seamount
17 55'N - 152 44'W
51-809-810
BUFFON Canyon
65 15'S - 145 00'E
BULLARD Fracture Zone
58 00'S - 14 15'W to 58 00'S - 5 30'W
*(July 1983) GEBCO-SCGN/6
BULLDOG Bank
10 02'S - 50 45'E
BURDICK Knoll
45 51'N - 157 48'W
BURDWOOD Bank
54 15'S - 59 00'W
20-200
BYRAMGORE Reef
11 55'N - 71 46'E
71-72-73
BYRD Canyon
75 25'S - 157 15'W
BYRD :
See  MARIE BYRD Seamount
CABLIERS Bank
35 42'N - 2 15'W
CABRILLO Seamount
22 50'N - 109 15'W
CAICOS Bank
21 35'N - 71 55'W
400-402-403
CALIFORNIA Seamount
17 50'N - 124 00'W
CALOOSAHATCHEE Seamount
34 40'N - 49 45'W
CAMPBELL Plateau
50 40'S - 171 00'E
CAMPBELL Rise
52 30'S - 170 00'E
* = Spur
CAMPBELL Seamount
50 16'N - 141 55'W
CAMPECHE Bank
22 00'N - 90 00'W
5.07, 5.08
CANADA Abyssal Plain
76 00'N - 150 00'W
CANADA Basin
72 30'N - 150 00'W to 83 00'N - 130 00'W
CANARY Basin
30 00'N - 24 00'W
11-12-14-104
CANO Seamount
10 16'N - 110 00'W
CANTOR Seamount
16 19'N - 109 22'W
CAP BRETON Canyon
43 45'N - 2 30'W
CAP HORN Seamount
36 41'S - 78 52'E
GEBCO-SCGN - Dec. 1987
CAPE Abyssal Plain
35 15'S - 11 45'E
CAPE Basin
35 45'S - 6 45'E
21-22-203-204
CAPE JOHNSON Tablemount
17 08'N - 177 15'W
CAPEL Bank
25 00'S - 159 35'E
602
CAPE Rise
See AGULHAS Ridge
CAPE VERDE Abyssal Plain
23 00'N - 24 00'W
14
CAPE VERDE Plateau
17 50'N - 20 00'W
12-14-104-215
* = Terrace
CAPE VERDE Seamount
15 20'N - 22 00'W
CAPRICORN Seamount
18 40'S - 172 10'W
60-605
CARDNO Guyot
12 57'S - 6 05'W
* = (April 1984) Tablemount
CARGADOS CARAJOS Bank
16 30'S - 59 30'E
CARLISLE Canyon
53 28'N - 170 15'W
CARLSBERG Ridge
10 00'N - 58 00'E to 0 00' - 67 00'E
71-72-73-703
CARMEN Basin
26 15'N - 110 30'W
CARNEGIE Ridge
1 00'S - 89 00'W to 1 00'S - 82 00'W
51-811
CARNEGIE Seamount
0 15'S - 81 53'W
CAROLINE Seamounts
7 15'N - 144 00'E to 6 00'N - 157 15'E
* = Ridge
CAROLINE :
See EAST CAROLINE Basin and WEST CAROLINE Basin
CARONDELET Reef
5 33'S - 173 50'W
617
CARYN Seamount
36 40'N - 67 56'W
11-12-403
CASCADIA Basin
46 40'N - 128 00'W
5.03, 5.07
CASCADIA Seachannel
43 30'N - 130 00'W
CATALINA Basin
33 10'N - 118 30'W
CAUVIN Bank
6 46'S - 72 22'E
CAYMAN Ridge
19 00'N - 82 20'W to 19 45'N - 79 00'W
CAYMAN Trench
18 50'N - 81 30'W to 19 20'N - 78 40'W
12-13-400-402-403
CAY SAL Bank
23 45'N - 80 00'W
400-401-403
CEARA Abyssal Plain
6 00'N - 41 30'W
12-13-20-216
CEARA Plateau
3 20'S - 37 30'W
* (March 1985)
CEARA Ridge
6 00'N - 45 00'W to 3 30'N - 41 00'W
* = AMAZON Ridge, GEBCO-SCGN/6
CEARA Seamounts
1 30'S - 38 45'W to 1 45'S - 37 05'W
20-216
* PARNAIBA Ridge
CEARA Terrace
2 15'S - 39 00'W
CEDROS Escarpment
27 20'N -115 30'W
CEDROS Trench
28 00'N - 116 00'W
CELEBES Basin
3 00'N - 122 00'E
508
CELTIC Shelf
50 00'N - 8 00'W
CENTRAL Bank
75 00'N - 37 00'E
* = MURMANSK Rise
CENTRAL Fracture Zone
18 00'N - 128 10'E to 15 00'N - 132 30'E
* =CENTRAL Basin Trough, INT Charts=CENTRAL Basin, Fault
CENTRAL INDIAN Ridge
5 00'S - 68 00'E to 25 00'S - 70 00'E
70-71-72-73
* = MID-INDIAN Ridge
CENTRAL KARA Rise
80 30'N - 80 00'E
CENTRAL PACIFIC Basin
9 00'N -  180 00'
5.06, 5.07, 5.00
506
CENTURION Bank
7 40'S - 70 50'E
70-71-72-73-702
CERMENO Seamount
10 23'N - 108 46'W
802-811
CERRALVO Seamount
24 12'N - 109 35'W
CHAGOS Bank
6 15'S - 72 00'E
70-71-72-73-702-703-707
(see also GREAT CHAGOS Bank) INT Charts = GREAT CHAGOS Bank * (April 1986)
CHAGOS Trench
9 00'S - 73 00'E to 3 30'S - 74 15'E
CHAGOS-LACCADIVE Ridge
13 30'N - 72 30'E to 9 00'S - 70 30'E
5.05, 5.09
CHAIN Fracture Zone
2 30'S - 20 00'W to 0 30'N - 10 00'W
202-215-216
CHAIN Ridge
5 00'N - 53 30'E
71-72-703
CHALLENGER Deep
11 20'N - 142 15'E
CHALLENGER Fracture Zone
37 00'S - 90 00'W to 35 00'S - 80 00'W
*= 34 00'S - 110 00'W
CHALLENGER Plateau
39 20'S - 168 40'E
60-600-601
CHALLENGER :
See GLOMAR CHALLENGER Basin
CHAMPLAIN Seamount
20 15'S - 37 20'W
CHARCOT Canyon
67 30'S - 80 00'W
CHARCOT Deep-Sea Fan
66 30'S - 90 00'W to 65 10'S - 82 30'W
CHARCOT Seamounts
44 50'N - 13 00'W
* (September 1983)
CHARLIE GIBBS Fracture Zone
52 30'N - 45 00'W to 52 15'N - 30 00'W
* = December 1983)
CHARLOTTE Bank
11 45'S - 173 10'E
CHATHAM Rise
43 30'S - 180 00'
CHAUCER Seamounts
42 50'N - 28 55'W
INT Charts = Bank
CHAUTAUQUA Seamount
22 10'N - 162 40'W
CHELAN Seamount
49 45'N - 131 32'W
CHERBANIANI Reef
12 20'N - 71 50'E
71-72
CHILE Basin
28 00'S - 77 00'W
CHILE Fracture Zone
36 30'S - 102 00'W to 35 45'S - 93 00'W
* CHALLENGER Fracture Zone 34 00'S - 110 00'W
CHILE Ridge
45 50'S - 77 30'W
CHILE Rise
40 00'S - 90 00'W
CHILE Trench
51 45'S - 76 30'W to 56 50'S - 70 00'W
5.15
CHILE :
See PERU-CHILE Trench
CHINA :
See SOUTH CHINA Basin
CHINCHORRO Bank
18 35'N - 87 22'W
CHINOOK Trough
44 00'N - 173 00'W
CHIRIKOF Knoll
55 36'N - 154 27W
GEBCO-SCGN/7
CHIRIKOF Seamount
54 50'N - 152 50'W
CHOPIN Seamount
26 08'N -162 03'W
CHUKCHI Abyssal Plain
76 45'N -172 00'W
CHUROV Seamount
17 29'S - 9 53'W
GEBCO-SCGN/7 = Subject to confirmation
CHUKCHI Plateau
77 50'N - 164 00'W
* (June 1987)= Borderland
CIPANGU Basin
34 00'N - 149 00'E
* (Septembre 1984) GEBCO-SCGN/6
CLAIRAUT Seamount
17 59'N - 110 29'W
CLARION Bank
20 50'N - 74 00'W
CLARION Fracture Zone
14 00'N - 149 00'W to 18 30'N - 120 00'W
CLARK Bank
8 05'S - 139 40'W
607
* = Reef
CLARK Basin
10 50'N - 80 40'W
400-402-811
CLARK Seamount
20 00'N - 157 38'W
CLERKE Reef
17 10'S - 119 20'E
71
CLIPPERTON Fracture Zone
3 00'N - 150 00' to 10 00'N - 114 00'W
CLIPPERTON Ridge
10 30'N - 110 00'W
CLIPPERTON Seamounts
9 30'N - 111 00'W
COBB Seamount
46 46'N - 130 49'W
COCO-DE-MER Seamounts
0 00' - 55 40'E
* GEBCO = Seamount
COCOS Basin
1 00'N - 93 00'E
71-73-707
See GEBCO-SCGN/7 * (October 1986)
COCOS Ridge
2 30'N - 90 00'W to 7 30'N - 84 00'W
51
COCOS KEELING Rise
13 00'S - 96 30'E
70-71-73-708
COCOS :
See WEST COCOS Seamount
COIBA Ridge
6 30'N - 81 45'W
COLBECK Basin
77 00'S - 159 30'W
COLOMBIA Basin
14 00'N - 76 00'W
* = COLOMBIAN
COLOMBIAN Trench
3 15'N - 78 45'W
COLON Ridge
2 00'N - 96 00'W
COLORADO Seamount
33 15'N - 37 20'N
COLUMBIA Seamount
20 45'S - 32 00'W
COLVILLE Ridge
30 00'S - 180 00'
600-602
COMORO Basin
14 00'S - 44 00'E
COMSTOCK Seamount
48 15'N - 156 50'W
CONCEPTION Bank
29 55'N - 12 45'W
* INT 11-14 = Seamount
CONFIANCE Shoal
18 30'S - 152 30'W
606-607
INT 606 = Seamount
CONGO Canyon
5 50'S - 9 20'E
CONGO Cone
6 00'S - 8 30'E
* = Fan, GEBCO = should be Fan.
CONGRESS Seamount
33 07'N - 54 49'W
11-12-13
CONRAD Fracture Zone
55 50'S - 6 30'W to 55 30'S - 1 30'W
CONRAD Rise
53 00'S - 41 00'E
(CONSTANTINE Bank)
20 25'S - 171 15'E
This feature has been canceled by AUS Notice to Mariners 793/1984
COOK Canyon
51 20'N - 128 40'W
* (June 1984) GEBCO-SCGN/6 (Replaces COOK Trough)
COOK Fracture Zone
26 30'S - 169 00'E to 28 30'S - 179 00'E
COOPER Ridge
7 00'N - 149 00'W
CORA DIVH
13 45'N - 72 10'E
71-72-73-705
Bank.
CORAL Basin
13 40'S - 151 20'E
* and INT 604 + CORAL SEA Basin
CORAL PATCH Bank
34 56'N - 11 57'W
103-104
CORNER Seamounts
35 30'N - 51 30'W
CORREIRA Bank
6 30'S -57 10'E
* = Guyot
CORSO-LIGURIAN Basin
42 55'N -8 00'E
CORTES Bank
32 28'N - 119 10'W
COWIE Seamount
54 10'N - 149 20'W
CRARY Bank
74 55'S -170 00'E
CRAWFORD Seamount
38 40'S - 11 10'W
21-22
CREST Seamount
24 35'N - 117 05'W
CRETAN Trough
35 45'N - 25 55'E
302
CROSLEY Seamount
16 55'N - 152 26'W
CROSS Seamount
18 45'N -158 15'W
CROUGH Seamount
24 45'S - 121 45'W
* (June 1984) GEBCO-SCGN/6
CROZET Basin
39 00'S - 60 00'E
70-72-73-700
CRUISER Seamount
32 23'N - 27 37'W
* = Tablemount, INT 12 = Tablemount
CUVIER Basin
22 00'S - 111 00'E
60-708
CUVIER Canyon
64 40'S - 140 00'E
CUVIER Plateau
24 10'S - 108 20'E
DACIA Seamount
31 10'N - 13 35'W
DAIGO-KASIMA Seamount
35 46'N - 144 19'E
510
DAIITI-KASIMA Seamount
35 49'N -142 40'E
* = KASHIMA Tablemount
DAIITI-KINAN Seamount
30 28'N - 136 18'E
DAINI-KASIMA Seamount
36 05'N - 143 28'E
DAINI-KINAN Seamount
30 10'N - 136 43'E
DAITO Ridge
25 35'N - 132 10'E
DAIYON-KASIMA Seamount
34 16'N - 144 00'E
DAKAR Canyon
14 10'N - 18 15'W
DALL Seamount
58 10'N - 145 35'W
DALY Canyon
65 30'S - 62 30'E
DALY Seamount
18 08'N - 157 40'W
104
DAMPIER Ridge
24 00'S - 157 00'E to 34 00'S - 158 30'E
DAMPIER Seamount
11 09'S - 0 27'W
DANA Fracture Zone
12 00'S - 97 45'W to 13 30'S - 93 30'W
DANA Seamount
18 38'N - 155 57'W
DANUBE Fan
44 00'N - 31 00'E
DAVID Seaknoll
6 24'N - 50 15'E
703
* = Knoll
DAVIDSON Bank
54 00'N - 163 45'W
DAVIDSON Seamount
35 43'N - 122 43'W
50-51-801-802
DAVIE Ridge
18 00'S - 41 45'E
DAVIE Seamount
36 30'S - 24 17'E
DAVIS Bank
20 35'S - 34 45'W
201-202
DAVIS Seamounts
51 40'S - 4 12'E
21
DAVIS Sill
65 30'N - 57 00'W
* (January 1985) GEBCO-SCGN/6
DAY Seamount
18 40'N - 156 20'W
DEACON Seamount
47 39'S - 43 48'E
GEBCO-SCGN/1988
DEBUSSY Seamount
30 18'N - 162 05'W
DE GERLACHE Seamounts
65 00'S - 90 30'W
DEHLINGER Seamount
42 00'N - 137 19'W
DE KRAFFT Seamount
13 53'N - 156 17'W
51-809
DELAN Basin
30 45'N -114 00'W
DEL CANO Rise
45 15'S - 39 30'E to 45 30'S - 47 00'E
DELFIN Basin
29 40'N - 113 50'W
DELGADA Canyon
40 02'N - 124 10'W
DELGADA Fan
39 15'N - 125 00'W
DELLWOOD Knolls
50 42'N - 130 15'W
* (June 1984) = SOUTHEAST DELLWOOD Knoll
DELLWOOD Seamounts
50 37'N - 130 42'W
DEMERARA Abyssal Plain
10 00'N - 51 00'W
216
DEMERARA Plateau
8 10'N - 53 30'W
DENSON Seamount
54 00'N - 137 15'W
DERICKSON Seamount
52 50'N - 161 15'W
DERWENT HUNTER Guyot
30 50'S - 156 10'E
DERYUGINA Basin
53 30'N - 145 45'E
512
* = DERYUGIN
DESBARRES Canyon
44 00'N - 53 27'W
DESCARTES Seamount
14 06'N - 108 45'W
D'ESTAING Bank
18 10'S - 43 17'E
701
DETROIT Trough
51 15'N - 167 45'E
DEUTSCHLAND Canyon
73 30'S - 29 50'W
DE VEUSTER Seamount
30 15'N - 177 30'E
GEBCO-SCGN/6 * (September 1984)
DEVILS Hole
56 38'N - 0 40'E
5.01
DEVONPORT Seamount Chain
31 30'S - 175 23'E
60-600-602-605
* = Seamount, INT 600-605 = Seamount
DIAMANTINA Fracture Zone
34 00'S - 101 00'E to 37 00'S - 115 00'E
60-70-73-708
DIANA Bank
22 31'N - 74 47'W
DIANE Bank
16 00'S - 149 40'E
DICKINS Seamount
54 30'N - 137 00'W
DINGAAN Fracture Zone
53 30'S - 11 30'E to 50 45'S - 15 15'E
DIRCK HARTOG Ridge
30 30'S - 105 10'E
* = HARTOG Ridge
DISCOVERY Seamounts
42 00'S - 0 10'E
DISCOVERY II Fracture Zone
44 30'S - 41 20'E to 39 00'S - 43 30'E
DISPATCH Seamount
27 42'N - 119 20'W
DMITRI MENDELEEV Seamount
4 52'N - 154 58'E
GEBCO-SCGN/7 * (October 1985)
DOGARESSA Bank
21 00'S - 33 45'W
DOGGER Bank
54 50'N - 2 20'E
DOHRN Bank
65 55'N - 29 42'W
112
DOHRN :
See ANTON DOHRN Seamount
DOLDRUMS Fracture Zone
8 30'N - 43 30'W to 8 00'N - 34 30'W
Dom JOAO DE CASTRO Bank
38 13'N - 26 38'W
11-14-103-104
DONIZETTI Seamount
32 20'N - 160 00'W
DONNA Ridge
16 30'S - 177 25'W
DORDRECHT Deep
33 30'S - 101 15'E
* = Basin
DORSEY Seamount
48 48'N - 156 45'W
DOWNWIND Seamount
16 37'N - 114 47'W
51-802
DRAAK :
See GULDEN DRAAK Knoll
DRAGON Bank
34 55'N - 16 30'W
* = Seamount UK 4103-4104 = Seamount
DREANOUGHT Bank
6 40'N - 95 50'E
DRYGALSKI Basin
74 50'S - 166 30'E
GEBCO-SCGN/7 *
DUBININ Trough
67 45'S - 78 00'E to 66 40'S - 82 00'E
5.13, 5.18
GEBCO-SCGN/7 * (August 1985)
DUFRESNE :
See MARION DUFRESNE Seamount
DUMSHAF Abyssal Plain
70 00'N - 4 00'E
DUPONT Shoal
4 15'S - 54 25'E
DURGIN Guyot
55 50'N - 141 50'W
* = Seamount, INT Charts = Seamount
DUTCHMEN :
See LOST DUTCHMEN Ridge
DUTOIT Fracture Zone
53 00'S - 25 30'E to 46 00'S - 30 10'E
5.09, 5.13
GEBCO-SCGN/6 * (October 1985)
DUTTON Seamount
20 03'N - 158 02'W
DVORAK Seamount
30 31'N - 161 20'W
EAST AZORES Fracture Zone
36 45'N - 28 30'W to 37 20'N - 20 00'W
EAST CAROLINE Basin
3 00'N - 146 00'E
EAST CORTES Basin
32 15'N - 118 30'W
EASTER Fracture Zone
26 15'S - 96 30'W to 25 30'S - 88 00'W
EAST INDIAMAN Ridge
22 50'S - 101 15'E to 30 00'S - 98 30'E
708
EAST MARIANA Basin
14 30'N - 155 00'E
EAST MARIANA Ridge
14 30'N - 145 30'E
EAST O'GORMAN Fracture Zone
12 45'N - 103 00'W to 15 30'N - 98 30'W
* GEBCO-SCGN/6: see O'GORMAN Fracture Zone
EAST PACIFIC Rise
17 00'N - 105 20'W to 55 00'S - 121 00'W
5.07, 5.11, 5.15
61-802-811
EAST SHEBA Ridge
14 30'N - 56 00'E
EAST TASMAN Plateau
44 00'S - 150 30'E
EAST THULEAN Rise
51 40'N - 22 00'W
102
EAURIPIK Rise
3 00'N - 142 00'E
ECLIPSE Seamount
19 08'S - 159 20'W
606
EDORAS Bank
56 00'N - 22 10'W
EEL Canyon
40 39'N - 124 35'W
EENDRACHT Seamounts
28 35'S - 102 45'E
EGERIA Fracture Zone
21 00'S - 65 00'E to 19 00'S - 68 00'E
EGGVIN Shoal
70 54'N - 12 52'W
10-113
EICKELBERG Ridge
48 45'N - 133 30'W
EICKELBERG Seamount
48 30'N - 133 10'W
EIHUKU Seamount
21 25'N - 144 09'E
EIRIK Ridge
58 30'N - 44 30'W
ELAN Bank
56 45'S - 67 50'E
ELIKALPENI Bank
11 15'N - 74 05'E
703-705
ELIZABETH Reef
29 58'S - 159 05'E
ELLET Bank
22 55'S - 169 25'E
ELLIS Seamount
19 10'N - 157 42'W
ELTANIN Fracture Zone System
50 00'S - 146 00'W to 58 00'S - 110 00'W
* = Fracture zone
ELY Seamount
56 15'N - 145 40'W
EMBATTLE Seamount
10 45'N - 164 10'W
617-809
EMDEN Deep
10 39'N - 126 36'E
* (November 1982) GEBCO-SCGN/6
EMERALD Basin
54 00'S - 162 30'E
EMERY Basin
31 50'N - 118 08'W
EMILE BAUDOT Bank
38 42'N - 2 30'E
EMILIA Seamount
43 50'N - 131 54'W
EMMONS Seamount
15 56'N - 166 50'W
50-809
EMPEROR Seamount Chain
51 30'N - 167 30'E to 32 00'N - 173 00'E
5.02, 5.06
53
EMPEROR Trough
46 00'N - 173 00'E to 38 00'N - 176 30'W
5.06, 5.07
ENDEAROR Seamount
48 15'N - 128 15'W
* (December 1983) = ENDEAVOUR
ENDEAVOUR Bank
25 20'N - 19 20'W
12-14-104
ENDERBY Abyssal Plain
60 00'S - 40 00'E
ENDRACHT Seamount
28 30'S - 102 57'E
70-73
ENDURANCE Canyon
69 30'S - 48 00'W
ENDURANCE Fracture Zone
56 20'S - 52 45'W to 56 45'S - 48 30'W
ENDURANCE Ridge
63 15'S - 41 40'W
ENGELBRECHT Seamount
36 10'S - 14 10'E
ENGGANO Basin
6 00'S - 103 40'E
GEBCO-SCGN/7 * (October 1986) = ENGANNO
EQUATORIAL MID-OCEAN Canyon
3 30'S - 32 00'W
* EQUATORIAL Seachannel
ERATOSTHENES Seamount
33 45'N - 32 45'E
ERBEN Seamount
32 52'N - 132 32'W
ERIADOR Seamount
54 50'N - 25 20'W
ERICA Seamount
38 15'S - 14 45'E
21-22-204
ERIC SIMPSON  Fracture Zone
42 00'S - 39 50'E to 45 00'S - 38 45'E
ERIMO Seamount
40 54'N - 144 57'E
* (SISOEV Seamount)
ERROR Seamount :
See MOUNT ERROR GUYOT
ESPINOSA Seamount
9 38'N - 114 10'W
ESTAFETTE Bank
37 37'N - 9 40'E
ETIENNE Canyon
52 40'N - 171 20'E
EUCLID Seamount
12 45'N - 110 30'W
EULER Seamount
16 03'N - 112 00'W
EUXINE Abyssal Plain
42 20'N - 33 00'E
EVA Seamount
22 00'S - 170 45'E
GEBCO-SCGN - Oct. 1987
EWING Seamount
23 16'S - 8 17'E
22-203-204
20 20'N - 174 10'E
EWING :
See MAURICE EWING Bank
EXMOUTH Plateau
20 00'S - 113 00'E
60-70-71-73-708
EXPLORER Seamount
49 05'N - 130 48'W
EXPLORER Tablemount
16 55'N - 83 15'W
* INT 400-402 = Seamount
FAEROE Bank
60 55'N - 8 30'W
FAEROE BANK Channel
61 10'N - 7 45'W
* = FAEROE Gap
FAEROE Shelf
62 00'N - 6 00'W
FAEROE-SHETLAND Channel
62 00'N - 3 00'W
FAEROE :
See ICELAND-FAEROE Rise
FAIRWAY Reef
21 00'S - 161 45'E
FAIRWEATHER Ground
58 22'N - 138 50'W
FAIRWEATHER Seamount
19 51'N - 113 01'W
FALEEV Seamount
8 26'S - 1 33'E
FALKLAND Escarpment
48 35'S - 55 00'W to 49 30'S - 46 00'W
* (MALVINAS Escarpment)
FALKLAND Fracture Zone
49 20'S - 40 00'W to 49 00'S - 35 45'W
20
* (MALVINAS Fracture Zone) GEBCO-SCGN/7, INT 20 = 48 S - 26 W
FALKLAND Plateau
51 00'S - 50 00'W
* (MALVINAS Plateau) GEBCO-SCGN/7
FALKLAND Ridge
49 00'S - 35 30'W to 48 40'S - 30 30'W
(MALVINAS Ridge) GEBCO-SCGN/7
FALKLAND Trough
53 00'S - 53 30'W to 52 30'S - 46 00'W
* (MALVINAS Trough) GEBCO-SCGN/7 (Not Chasm)
FANGORN Bank
55 30'N - 20 10'W
FARADAY Fracture Zone
49 30'N - 31 00'W to 49 30'N - 24 00'W
FARADAY Seamount
49 40'N - 29 05'W
11-14-102-103
FARALLON Basin
24 45'N - 109 30'W
FARIS Seamount
54 30'N - 147 15'W
FARQUHAR Ridge
11 10'S - 50 00'E to 8 45'S - 51 45'E
FAWN Trough
57 45'S - 75 30'E
FENI Ridge
54 00'N - 17 30'W
* (September 1983) INT 102 = SOUTH FENI Ridge
FERNANDO DE NORONHA Abyssal Plain
2 30'S - 30 00'W
12-20-215-216
FERNANDO DE NORONHA Ridge
3 45'S - 33 10'W
20-202-215-216
FERREL Seamount
29 30'N - 117 18'W
50-802
FIEBERLING Tablemount
32 22'N - 127 50'W
FIFTEEN TWENTY Fracture Zone
15 30'N - 47 30'W to 14 00'N - 36 30'W
FIJI Plateau
14 20'S - 171 00'E
60-604
FIJI :
See NORTH FIJI Plateau and SOUTH FIJI Plateau
FILIPPO Reef
5 30'S - 151 50'W
FILLEBROWN Seamount
15 05'N - 162 55'W
FINCH Seamount
17 32'N - 157 35'W
FLEMISH Cap
47 00'N - 45 00'W
11-13-404
FLEMISH Pass
47 00'N - 46 45'W
13-404
* (June 1984)
FLINDERS Reef
17 40'S - 148 20'E
* = reefs
FLINDERS Seamount
34 40'S - 159 44'E
60-601-602
FLORA Reef
16 50'S - 147 45'E
FLORES Basin
7 45'S - 120 00'E
FORMIGAS Bank
18 30'N - 75 45'W
FORTUNE Bank
7 15'S - 57 00'E
70-71-72-702-703
FOSTER Seamount
48 57'N - 133 50'W
FOURIER Seamount
14 05'N - 111 00'W
FOUR LADIES Bank
67 05'S - 78 00'E
FOUR NORTH Fracture Zone
4 00'N - 36 00'W to 4 00'N - 27 00'W
FOXE Basin
67 00'N - 78 00'W
FRAM Bank
67 20'S - 69 30'E
FRANKLIN Seamount
57 54'N - 26 30'W
FRANKLIN Shoal
75 50'S - 169 00'E
FRASER Seamount
24 25'S - 155 15'E
FREDERICK Reefs
20 57'S - 154 23'E
FRED Seamount
6 15'S - 54 25'E
FRENCH FRIGATE Shoals
23 45'N - 166 10'W
* GEBCO = Shoal
FROYA Bank
63 45'N - 7 30'E
10-11-101
FRYER Guyot
20 30'N - 148 00'E
* (December 1983) GEBCO-SCGN/6
FUGLOY Bank
71 00'N - 20 00'E
5.01, 5.17
* (OCT.1986) = FUGLOYA
FUNDIAN Valley
42 20'N - 66 30'W
13-403
FUNK Seamount
46 15'S - 37 30'E
HALL Bank
21 52'S - 39 00'E
HALMAHERA Basin
0 30'S - 129 00'E
HALTEN Bank
64 45'N -8 45'E
HAMILTON Bank
54 00'N - 54 30'W
* (Sept. 1983)
HAMMERSTEIN Seamount
32 28'N - 165 46'W
HANCOCK Bank
1 04'S -90 13'W
503
HANDEL Seamount
27 26'N - 159 53'W
HARRISON Seamount
12 40'N - 167 55'W
504
HARRIS Seamount
46 10'N - 161 25'W
HARTOG :
See DIRCK HARTOG Ridge
HASSAYAMPA Seamount
15 18'N - 163 29'W
50-51-504
HATTERAS Abyssal Plain
29 00'N - 70 30'W
11
HATTERAS Canyon
35 00'N - 75 00'W
HATTON Bank
58 35'N - 18 00'W
HATTON-ROCKALL Basin
57 30'N - 17 00'W
HAVRE Trough
28 00'S - 178 40'W
600
HAWAIIAN Ridge
31 00'N - 176 00'E to 22 00'N - 160 00'W
50-504
HAWAIIAN Trough
21 00'N - 155 00'W
HAWAIIAN :
See NORTH HAWAIIAN Ridge
HAWLEY Ridge
51 00'N - 176 15'W
50-513
HAYDN Seamount
26 40'N - 161 12'W
HAYES Fracture Zone
34 30'N - 41 30'W to 33 00'N - 35 00'W
HAZEL HOLME Bank
12 45'S - 174 00'E
HEBRIDEAN Shelf
59 15'N - 5 30'W
HEBRIDES TERRACE Seamount
56 25'N - 10 25'W
* = HEBRIDES Seamount
HECATE Seamount
52 17'N - 31 00'W
11-13-14-102
HECETA Bank
44 10'N - 124 45'W
501
HECHT Seamount
53 45'N - 151 20'W
50-500
HECK Canyon
52 15'N - 175 00'E
513
HECK Seamount
48 30'N - 130 00'W
50-501
HEEZEN Fracture Zone
51 25'S - 140 00'W to 57 45'S - 110 00'W
HELLENIC Trench
37 15'N - 20 15'E to 34 50'N - 28 00'E
HEMLER Guyot
19 40'N - 151 40'E
HENDERSON Seamount
25 34'N - 119 33'W
50-51-502
HERALD Valley
71 15'N - 174 20'E
HERDMAN Seamount
45 20'S - 0 30'E
HERODOTUS Basin
33 00'N - 28 00'W
* GEBCO-SCGN/7, INT Chart = Abyssal Plain
HERODOTUS Rise
33 40'N - 23 30'E
HERODOTUS Seamount
33 36'N - 19 55'E
HERO Fracture Zone
61 30'S - 66 00'W
HERMES :
See PEARL AND HERMES Reef
HESS Rise
36 30'N - 177 00'E
HESS Tablemount
17 50'N - 174 15'W
HIKURANGI Trench
41 30'S - 177 00'E
HILLARY Canyon
72 25'S - 173 00'W
HILL :
See M.N. HILL Ridge
HINDS Seamount
18 26'N - 153 10'W
HISPANIOLA Trough
20 18'N - 71 00'W
HJORT Trench
58 30'S - 157 45'E
HOBBS Bank
74 20'S - 137 30'W
HODGES Knoll
12 25'N - 155 37'W
51-504
HODGES Seamount
31 54'N - 58 44'W
11-12-400
HODGKINS Seamount
53 30'N - 136 05'W
50-500-501
HODGKINS Seamounts
53 40'N - 136 30'W
HOGSTY Reef
21 41'N - 73 49'W
108-400-401-402
HOKE Seamount
32 06'N - 126 56'W
50-51-501
HOKKAIDO Rise
42 30'N - 150 00'E to 46 30'N - 157 00'E
53-511
* (see also ZENKEVICH Rise) GEBCO = ZENKEVICH Rise, INT Charts =HOKKAIDO Rise
HOLMES Reef
16 30'S - 147 50'E
HOLME :
See HAZEL HOLME Bank
HOOKER Basin
70 10'S - 166 20'E
HOOK Ridge
51 30'N - 143 40'W
HORIZON Bank
13 10'S - 173 35'E
HORIZON Channel
47 10'N - 145 00'W
HORIZON Deep
23 20'S - 174 47'W
HORIZON Ridge
14 30'S - 106 15'E
HORIZON Tablemount
19 40'N - 168 30'W
50-60-809
HORSESHOE Seamounts
36 00'N - 13 00'W
HOTSPUR Fracture Zone
19 00'S - 18 30'W to 17 00'S - 5 00'W
HOTSPUR Seamount
18 00'S - 36 00'W
HOWE :
See LORD HOWE Rise and LORD HOWE Seamount Chain
HUDDELL Seamount
28 20'N -146 13'W
HUDSON Canyon
39 30'N - 72 15'W
HUKUTOKU Seamount
24 03'N - 141 37'E
HUKUZIN Seamount
21 56'N - 143 28'E
HUNTER Channel
34 00'S - 28 00'W
22-201
* = Gap
HUNTER :
See DERWENT HUNTER Guyot
HYDRA Seamount
11 00'S - 50 35'E
HYERES Seamount
31 30'N - 29 00'W
IBERIAN Abyssal Plain
41 30'N - 14 00'W
ICELAND Basin
58 00'N - 28 00'W to 61 30'N - 16 30'W
11-14
ICELAND-FAEROE Rise
64 15'N - 12 15'W to 62 30'N - 8 00'W
* = FAROE-ICELAND Ridge
ICELANDIC Plateau
68 00'N - 12 30'W  to 69 30'N - 12 15'W
* = ICELAND Plateau
ICELAND :
See GREENLAND-ICELAND Rise
IGNACIO Canyon
25 30'N - 109 30'W
IIZUKA Seamount
42 21'N - 131 56'W
IMARSSUAK Channel
57 00'N - 43 00'W to 60 00'N - 37 00'W
* = Seachannel
IMPERIEUSE Reef
17 37'S - 118 58'E
INDIAMAN :
See EAST INDIAMAN Ridge
INDIANAPOLIS Seamount
19 38'N - 156 42'W
INDIAN :
See CENTRAL INDIAN Ridge, MID-INDIAN OCEAN Basin, SOUTHEAST INDIAN Ridge, SOUTHWEST Ridge, SOUTHWEST INDIAN Ridge, and SOUTH INDIAN Abyssal Plain.
INDISPENSABLE Reefs
12 45'S - 160 25'E
INDOMED Fracture Zone
42 30'S - 45 30'E to 35 00'S - 48 00'E
INDUS Canyon :
See THE SWATCH
INDUS Fan
23 00'N - 66 00'E to 16 00'N - 64 00'E
INGOYDJUPET
71 25'N - 22 35'E
100
Hole
INSTITUTA OKEANOLOGII Rise
52 00'N - 149 30'E
* = I.O. Rise
INVESTIGATOR Bank
8 30'N - 73 17'E
703-706-707
INVESTIGATOR Ridge
4 30'S - 98 15'E to 17 15'S - 99 10'E
INVISIBLE Bank
11 10'N - 93 28'E
IONIAN Basin
35 45'N - 18 00'E
IRMINGER Basin
61 00'N - 36 00'W
IRONWOOD Seamount
10 40'N - 159 57'W
51-617-809
IRVING Seamount
32 00'N - 28 00'W
ISAKOV Seamount
31 40'N - 151 05'E
ISELIN Bank
72 45'S - 177 30'W
ISENGARD Ridge
52 25'N - 21 00'W
ISLAS ORCADAS Fracture Zone
55 00'S - 5 00'E to 53 30'S - 3 00'E
ISLAS ORCADAS Rise
51 00'S - 26 20'W
IVERSEN :
See THOR IVERSEN Bank
IWABUCHI Seamount
42 04'N - 132 44'W
IWAKI Seamount
36 55'N - 144 55'E
IZU-OGASAWARA Rise
32 00'N - 143 30'E
IZU-OGASAWARA Trench
32 00'N - 142 10'E
* = IZU Trench
JABARU Fracture Zone
52 15'S - 15 05'E
GEBCO-SCGN/6 (formerly MANDELA) - To be cleared.
JACQUELINE Guyot
19 20'N - 176 40'E
JAGGAR Seamount
19 23'N - 157 00'W
JAGUA Bank
21 35'N - 80 40'W
* INT 400-402 = XAGUA
JAGUAR Seamount
21 55'S - 39 27'E
70-71-72-701
JAMES Knoll
51 00'N - 177 12'E
JAN MAYEN Bank
70 00'N - 9 00'W
10-100
JAN MAYEN Fracture Zone
71 40'N - 11 30'W to 69 30'N - 0 30'W
113
JAN MAYEN Ridge
67 50'N - 9 20'W to 70 30'N - 8 30'W
JAPAN Basin
41 00'N - 132 30'E to 43 00'N - 138 00'E
JAPAN Rise
38 30'N - 146 00'E
JAPAN Trench
36 00'N - 142 50'E to 40 30'N - 144 30'E
510-511
JASEUR Seamount
20 30'S - 36 05'W
JASPER Seamount
30 32'N - 122 42'W
JAVA Ridge
8 30'S - 107 00'E to 10 45'S - 118 00'E
JAVA Trench :
See SUNDA Trench
JENLUISE Bank
64 00'S - 106 30'E
JIMMU Guyot
46 00'N - 169 25'E
* = Seamount GEBCO-SCGN/6
JINGU Guyot
38 50'N - 171 15'E
JINGU Basin
39 30'N - 171 00'E
JOAO PESSOA Plateau
6 50'S - 33 30'W
12-13-202-215-216
INT 12-13 = Terrace
JOIDES Basin
74 30'S - 174 00'E
JONES Seamount
43 33'N - 132 55'W
52 25'N - 148 55'W
JORDAN Knoll
23 32'N - 83 48'W
400-401-402
JOSEPHINE Bank
36 35'N - 14 15'W
* = Seamount, INT Charts 11-12-14 = Seamount
JUAN DE FUCA Canyon
47 50'N - 125 30'W
JUAN DE FUCA Ridge
46 00'N - 130 00'W
JUSSIEU Canyon
65 15'S - 143 00'E
JUTLAND Bank
56 50'N - 7 20'E
KAGAMI Seamount
45 29'N - 140 37'W
KAINAN MARU Seamounts
64 50'S - 34 35'E
KALANIOPUU Basin
25 00'N - 180 00'
* (Sept.1984) GEBCO-SCGN/6
KAMCHATKA Basin :
See KOMANDORSKAYA Basin
KAMCHATKA :
See KURIL KAMCHATKA Trench
KAMEHAMEHA Basin
15 00'N - 160 00'W
KAMMU Guyot
32 10'N - 173 00'E
KANAEV Seamount
33 07'S - 84 50'E
KANAGA Basin
50 48'N - 178 25'W
KANE Basin
79 30'N - 68 00'W
KANE Fracture Zone
24 30'N - 50 00'W to 22 40'N - 40 00'W
KANE Gap
9 15'N - 19 30'W
* (September 1983) GEBCO-SCGN/6
KANE Seamount
21 05'N - 28 05'W
KANIN Bank
69 35'N - 42 00'E
KANIN :
See NORTH KANIN Bank
KANMU Seamount
32 00'N - 173 10'E
* = KAMMU
KARA :
See CENTRAL KARA Rise
KARASEV :
See BORIS KARASEV Bank
KARIN Seamount
17 55'N - 168 58'W
KASHEVAROV Bank
55 40'N - 145 30'E
KAYAR Canyon
15 25'N - 18 00'W
KAYAR Seamounts
15 40'N - 17 45'W
KELSO Bank
24 10'S - 159 30'E
KELVIN Seamount
38 50'N - 64 00'W
KENN Reefs
21 10'S - 155 45'E
KEPLER Seamount
18 30'N - 109 35'W
KERGUELEN Plateau
51 00'S - 72 00'E to 60 00'S - 83 00'E
KERMADEC Ridge
35 00'S - 179 15'E to 27 45'S - 177 40'W
60-600-605
KERMADEC Trench
35 30'S - 178 45'W to 26 30'S - 175 30'W
KERMIT ROOSEVELT Seamount
39 10'N - 146 20'W
KERN Seamount
32 33'N - 166 00'W
KHACHATURIAN Seamount
28 09'N - 162 00'W
KHAYYAM Seamount
14 17'N - 107 02'W
KINGMAN Basin
8 30'N - 167 30'W
* (October 1985) GEBCO-SCGN/6
KINGMAN Reef
6 20'N - 162 25'W
KINGSTON Bank
17 37'N - 77 55'W
KINGS Trough
43 45'N - 22 00'W
KINMEI Seamount
35 00'N - 171 40'E
* = KIMMEI (33 43'N)
KISKA Knoll
51 07'N - 176 24'E
KITA-HIYOSI Seamount
23 45'N - 141 43'E
KITA-KOHO Seamount
26 46'N - 135 23'E
KITAMI-YAMATO Bank
44 29'N - 144 11'E
KITA-YAMATO Bank
39 50'N - 134 00'E
* = NORTH YAMATO Ridge
KIWI Seamount
30 43'S - 173 54'E
39 19'N - 64 36'W
KNIPOVICH Ridge
74 20'N - 8 00'E to 79 00'N - 0 00'
KNIPOVICH Seamount
5 34'N - 26 55'W
KODIAK Seamount
56 50'N - 149 15'W
KODIAK Seamounts
55 00'N - 140 00'W
KOHLER Seamount
52 50'S - 65 00'E
KOKO Guyot
35 15'N - 171 35'E
* =Seamount GEBCO-SCGN/6
KOLBEINSEY Ridge
67 20'N - 18 30'W to 70 20'N - 15 20'W
KOMAHASI-DAINI Seamount
29 54'N - 133 19'E
KOMAHASI-DAISAN Seamount
31 37'N - 137 16'E
KOMAHASI Seamount
28 05'N - 134 40'E
KOMANDORSKAYA Basin
57 00'N - 168 00'E
512-813
* = KOMANDORSKIYE, INT Charts = KAMCHATKA
KOREAN Plateau
39 00'N - 130 00'E
* = KOREA Borderland
KOSCIUSKO Bank
10 25'S - 179 30'E
604-617
* = Tablemount, INT 617 = Tablemount
KOSYU Seamount
31 25'N - 136 13'E
KRUSENSTERN Trough
50 00'N - 165 30'E
KRYLOV Seamount
17 37'N - 30 04'W
KURCHATOV Fracture Zone
40 40'N - 29 30'W
KURCHATOV Seamount
5 25'S - 68 27'E
KUTUZOV Seamount
15 12'S - 8 19'W
GEBCO-SCGN - Oct. 1988
KURIL Basin
46 40'N - 147 00'E
KURIL-KAMCHATKA Trench
41 00'N - 145 00'E to 54 00'N - 163 10'E
* = KURIL Trench
KYUSYU-PALAU Ridge
30 00'N - 133 15'E to 10 00'N - 134 45'E
LABRADOR Basin
55 00'N - 47 00'W
11-13-404-405
LABRADOR Trough
56 45'N - 60 20'W to 54 2O'N - 56 00'W
* (April 1984) GEBCO-SCGN/6
LA CONFIANCE Seamount
18 30'S - 152 32'W
LACROIX Guyot
19 10'N - 173 15'E
GEBCO-SCGN - Aug. 1987
LAGRANGE Seamount
17 18'N - 110 55'W
LA JOLLA Canyon
32 53'N - 117 17'W
LA JUNON Bank
5 15'S - 57 00'E
LAMARCK Canyon
64 45'S - 137 45'E
LAMONT Guyot
21 32'N - 159 32'E
LANSDOWNE Bank
20 30'S - 161 00'E
602-604
LA PERLE Reef
6 00'S - 55 20'E
LAPEROUSE Bank
48 40'N - 125 50'W
The French official spelling of this name is as one word (GEBCO-SCGN-1987)
LAPEROUSE Seamount
19 40'S - 54 10'E
LAPLACE Seamount
14 40'N - 110 40'W
LASKOWSKI Seamount
51 50'N - 144 45'W
LASUEN Knoll
33 24'N - 118 00'W
LATAKIA Basin
35 45'N - 35 20'E
LAU Basin
20 00'S - 177 30'W
LAU Ridge
21 30'S - 178 45'W
605
LAURENTIAN Channel
46 30'N - 58 30'W
13
* = Trough (1/1985) INT Chart = Valley
LAWSON Bank
8 40'S - 140 45'W
LAZAREV Trough
65 10'S - 129 00'E to 66 00'S - 134 00'E
* (August 1985) GEBCO-SCGN/7
LEARMONTH Bank
54 29'N - 133 03'W
801-810
LE CONSTANT Bank
6 20'S - 56 20'E
LEEUWIN Canyon
35 15'S - 115 40'E
LEFACOR Knoll
45 35'N - 157 23'W
LEIBNITZ Seamount
16 50'N - 110 12'W
LENA Canyon
64 55'S - 90 20'E
LENA Seamount
53 00'S - 44 15'E
L'ESPOIR Ridge
33 00'S - 101 30'E
LE TROU SANS FOND
5 10'N - 3 58'W
Canyon
LEVEN Bank
12 30'S - 47 45'E
LIGETI Ridge
61 55'S - 28 15'W
LIGHTHOUSE Reef
17 20'N - 87 32'W
LIHOU Reef
17 25'S - 151 40'E
* = Reefs, INT Charts = Reefs
LILIUOKALANI Ridge
34 00'N - 176 15'W to 28 00'N - 171 00'W
GEBCO-SCGN/6 (Replaces 'NORTHWEST HAWAIIAN Ridge')
LION Bank
35 15'N - 15 35'W
* = Seamount, INT 11-12-14=Seamount
LISZT Seamount
28 59'N - 162 05'W
LITKE Trough
80 20'N - 8 00'E to 82 10'N - 18 00'E
LITTLE AMERICA Basin
77 35'S - 162 00'W
LITTLE BAHAMA Bank
26 55'N - 78 40'W
LOBACHEVSKI Seamount
16 29'N - 109 04'W
* and INT charts = LOBACHEVSKIY
LOIHI Seamount
18 56'N - 155 16'W
LOMBOK Basin
10 00'S - 116 00'E
60-603-708
LOMONOSOV Ridge
85 00'N - 65 00'W to 80 00'N - 143 00'E
LONARDI Seamount
43 50'S - 49 00'W
LORD HOWE Rise
24 00'S - 161 30'E to 37 00'S - 166 00'E
60-600-602
LORD HOWE Seamount Chain
31 15'S - 159 00'E to 21 30'S - 159 30'E
LORIEN Knoll
54 10'N - 19 50'W
* = Bank (September 1983) GEBCO-SCGN/6
LOST DUTCHMEN Ridge
24 10'S - 105 10'E
LOTUS Seamount
22 35'S - 151 00'W
LOUISA Bank
11 40'S - 175 55'E
LOUISE A BOYD Bank
72 40'N - 2 50'E
* = BOYD Seamount
LOUISVILLE Ridge
27 00'S - 174 30'W to 43 00'S - 161 30'W
5.10, 5.11
60-61-605
LOUSY Bank or OUTER BAILEY Bank
60 25'N - 12 35'W
10-11-14-102-112
* = OUTER BAILEY, GEBCO = LOUSY, INT Charts = OUTER BAILEY or LOUSY
LOWRIE Guyot
19 40'N - 150 47'E
LOYOLA Bank
55 03'S - 65 22'W
LUSITANIA Bank
23 35'N - 111 42'W
LUZON Plateau
16 50'N - 124 30'E
* = BENHAM Plateau
LYALL Basin
70 30'S - 167 25'E
LYNCH Seamount
32 45'N - 54 15'W
* (September 1984) GEBCO-SCGN/6
MABAHISS Fracture Zone
3 00'S - 67 30'E
MACCLESFIELD Bank
15 50'N -114 2O'E
MACDONALD Guyot
MACDONALD Seamount
28 59'S - 140 14'W
* GEBCO-SCGN/1988
MACGOWEN Reef
1 07'S - 89 54'W
MACNAB Seamount
45 11'N - 135 42'W
MACQUARIE Ridge
47 00'S - 166 00'E to 59 20'S - 159 30'E
MADAGASCAR Basin
27 00'S - 54 30'E
70-72-700-701
MADAGASCAR Ridge
27 00'S - 46 00'E to 34 00'S - 45 00'E
70-72-700
* = Plateau
MADEIRA Abyssal Plain
31 00'N - 23 00'W
MADEIRA Rise
33 00'N - 18 30'W
* = Ridge (35 30'N - 15 45'W)
MADINGLEY Rise
4 30'S - 61 00'E
70-72-702
MAGDALENA Escarpment
23 30'N -112 00'W
MAGELLAN Rise
7 00'N - 177 00'W
MAGELLAN Seamounts
18 00'N - 151 00'E to 11 00'N - 157 00'E
MAGNAGHI Seamount
39 53'N - 11 36'E
MAHER Seamount
29 30'N - 148 50'W
MAHLER Seamount
31 46'N - 164 58'W
MAIKO Seamount
34 02'N - 145 55'E
* (March 1985) GEBCO-SCGN/6
MAKAROV Basin
81 00'N - 166 00'E to 88 30'N - 120 00'W
MAKAROV Seamounts
29 25'N - 153 30'E
MAKASSAR Basin
1 30'S - 118 30'E
* (Nov.1986)
MAKASSAR :
See SOUTH MAKASSAR Basin
MALDIVE Ridge
3 00'N -73 00'E
MALLORY Seamount
36 49'S - 22 22'E
MALLOY Seamount
27 55'S - 8 50'E
* UK Charts = MOLLOY
MALPELO Ridge
4 30'N - 80 50'W
MALVINAS:
See FALKLAND
MANIHIKI Plateau
11 00'S - 162 30'W
MANNING Seamounts
38 10'N - 60 40'W
MANUS Basin
3 45'S - 150 00'E
MANUS Trench
0 45'S - 144 00'E to 1 45'S - 152 30'E
506-604
* = WEST MELANESIAN, INT Charts = WEST MELANESIAN (see also WEST MELANESIAN Trench)
MAPMAKERS Seamount
27 30'N - 166 30'E
* = MAPMAKER
MARANHAO Seamounts
0 35'S - 42 00'W
MARARA Seamount
15 12'S - 156 50'W
MARCHAND Seamount
54 50'N - 151 45'W
MARCUS-WAKE Seamount Group
24 20'N - 150 00'E to 24 00'N -159 20'E
52-510
* (Sept.1984) = Seamounts
MAR DEL PLATA Canyon
38 00'S - 53 30'W
MARGETTS Seamount
14 33'N - 112 07'E
MARIANA Trench
24 30'N - 143 30'E to 11 00'N - 141 30'E
MARIANA Trough
20 30'N - 143 30'E to 14 00'N - 144 00'E
MARIANA :
See EAST MARIANA Basin, EAST MARIANA Ridge, MIDDLE MARIANA Ridge, and WEST MARIANA Ridge.
MARIE BYRD Canyon
75 00'S - 152 50'W
MARIE BYRD Seamount
70 00'S - 118 00'W
MARIE CELESTE Fracture Zone
18 45'S - 63 00'E to 15 00'S - 69 30'E
MARIETTA Seamount
57 02'N - 28 41'W
MARION DUFRESNE Seamount
54 20'S - 50 50'E
MARO Bank
71 08'N - 9 25'W
MARO Reef
25 30'N - 170 45'W
MARQUESAS Fracture Zone
10 00'S - 134 00'W to 8 15'S - 121 00'W
MARSHALL Seamount
11 50'N - 165 00'W
MARSHALL Seamounts
10 00'N - 169 00'E
MARSILI Seamount
39 13'N - 14 22'E
MARTHA Bank
10 40'S - 179 35'E
MARTIN VAZ Fracture Zone
19 00'S - 18 00'W to 18 00'S - 5 30'W
MARU :
See KAINAN MARU Seamounts
MARYLAND Seamount
15 50'N - 160 00'W
MASCARENE Basin
13 00'S - 57 00'E
70-71-72-701-702
* = 15 S - 56 E, INT Charts = 18 S - 54 E
MASCARENE Plain
19 00'S - 53 00'E
MASCARENE Plateau
6 00'S - 58 00'E to 17 00'S - 59 30'E
71-72-702
MATHEMATICIANS Seamounts
15 30'N - 111 00'W
MATU Seamount
39 33'N - 138 10'E
MAUD Rise
65 00'S - 2 40'E
MAURICE EWING Bank
50 40'S - 43 30'W
MAURICE HILL Ridge
3 30'S - 53 10'E
Formerly M.N. HILL Ridge
MAURITIUS Trench
24 00'S - 54 50'E
MAURY Channel
56 30'N - 24 00'W
MAWSON Bank
73 30'S - 174 00'E
MAWSON Canyon
63 30'S - 60 30'E
MAXWELL Fracture Zone
47 40'N - 27 00'W
MAZATLAN Basin
22 45'N - 108 10'W
McCALL Seamount
18 45'N - 157 05'W
McKERNAN Seamount
42 20'N - 141 06'W
McKINLEY Seamount
29 30'N - 137 15'W
McLEOD Bank
9 54'S - 50 20'E
McMANUS Seamount
42 12'N - 139 00'W
McNISH Seamount
40 15'S - 8 30'W
MEDINA Bank
34 54'N - 15 15'E
MEDINA Seamount
3 17'N - 88 18'W
MEDITERRANEAN Ridge
35 00'N - 20 00'E to 35 00'N - 30 00'E
MEDNYY Seamount
55 25'N - 167 17'E
MEINESZ :
See VENING MEINESZ seamounts
MEIYO-DAINI Seamount
39 45'N - 137 13'E
MEIYO-DAISAN Seamount
40 21'N - 137 54'E
MEIYO Seamount
39 16'N - 136 57'E
MEIZI Seamount
53 05'N - 164 45'E
* = MEIJI
MELANESIAN Basin
0 00' - 166 00'E
5.00, 5.06, 5.10
52-60-61-506-604
MELITA Bank
34 18'N - 14 30'E
MELLISH Reef
17 25'S - 155 50'E
* = Rise
MELVILLE Bank
38 29'S - 46 46'E
MELVILE Fracture Zone
26 00'S - 61 20'E to 34 00'S - 60 00'E
MELVILLE Trough
74 00'N - 108 30'W
MENARD Fracture Zone
47 45'S - 124 00'W to 51 00'S - 104 00'W
MENARD Guyot
20 50'N - 173 12'E
MENARD Seamount
42 12'N - 134 15'W
MENDANA Fracture Zone
17 15'S - 99 00'W to 11 00'S - 82 00'W
MENDELEEV Abyssal Plain
81 00'N -170 00'W
MENDELEEV Rise
76 00'N - 180 00'W to 86 00'N - 170 00'W
GEBCO/SCGN/7 (formerly Ridge), * = Ridge
MENDELEEV Seamount :
See DMITRI MENDELEEV Seamount GEBCO-SCGN/7
MENDELL Knoll
50 42'N - 157 12'W
MENDELSSOHN Seamount
25 10'N - 161 39'W
MENDOCINO Escarpment
40 00'N - 140 00'W
MENDOCINO Fracture Zone
36 00'N - 168 00'W to 40 20'N - 126 00'W
MENDOCINO Ridge
40 22'N - 127 30'W
MENDOZA Rise
19 30'S - 94 20'W
MENDOZA Seamount
9 30'N - 107 14'W
MENTAWAI Basin
1 45'S - 100 00'E
MENTAWAI Ridge
4 30'S - 101 20'E
MERCATOR Basin
33 00'N - 165 00'E
MERGUI Terrace
9 00'N - 96 45'E
MERMAID Reef
17 05'S - 119 35'E
MERNOO Bank
43 30'S - 175 15'E
MERZ Seamount
48 32'S - 5 33'E
METEOR Rise
44 45'S - 4 00'E to 47 10'S - 8 15'E
METEOR Seamounts
48 00'S - 8 30'E
METEOR :
See GREAT METEOR Bank
MEXICO Basin
22 30'N - 95 00'W to 25 00'N - 90 00'W
* GEBCO Sheets = SIGSBEE Deep
MGU Seamount
12 23'N - 61 15'E
71-72-703-705
* (October 1985)
MIAMI Guyot
21 40'N - 161 55'E
MID-ATLANTIC Ridge
52 30'N - 33 00'W to 54 30'S - 1 45'W
5.04, 5.07, 5.12, 5.16
11-12-13-14-21
MIDDLE AMERICA Trench
17 30'N - 103 00'W to 10 00'N - 86 30'W
MIDDLE MARIANA Ridge
21 00'N - 144 30'E
MIDDLE Reef
51 58'N - 176 03'E
MIDDLETON Reef
29 27'S - 159 07'E
MID-INDIAN OCEAN Basin
10 00'S - 80 00'E
70-73-702-706-707
* = MID-INDIAN Basin
MID-PACIFIC Seamounts
20 00'N - 172 00'E to 20 00'N - 168 00'W
* = Mountains (Sept.1984)
MIKHAILOV Canyon
65 30'S - 86 00'E
MILLER Seamount
53 30'N - 144 20'W
MILNE Bank
43 38'N - 38 46'W
* = Seamount, INT charts = ED (1864-1936)
MILNE Seamounts
44 45'N - 40 00'W
11-13-14
MINAMI-DAIKOKU Seamount
21 02'N - 144 32'E
MINAMI-HIOYOSI Seamount
23 30'N - 141 54'E
MINAMI-KASUGA Seamount
21 36'N - 143 38'E
* (June 1985)
MINAMI-KOHO Seamount
26 14'N - 135 48'E
MINERVA Reefs
23 15'S - 179 00'W
MINERVA Seamount
17 00'S - 37 30'W
INT 202 = Bank
MINERVE Reef
22 40'S - 133 35'W
* = EBRILL Reef
MINIA Seamount
53 03'N - 34 50'W
MISSISSIPPI Fan
27 00'N - 87 30'W
MISTERIOSA Bank
18 50'N - 83 50'W
MOCHA Fracture Zone
40 00'S - 77 30'W
MOCTEZUMA Trough
18 00'N - 107 00'W to 15 30'N - 107 20'W
MOHNS Ridge
71 30'N - 5 00'W to 72 15'N - 2 45'E
MOLLOY Seamount:
See MALLOY Seamount
MOLOKAI Fracture Zone
22 00'N - 153 30'W to 25 40'N - 127 00'W
50-51-504-802-809
MONA Canyon
19 20'N - 67 35'W
MONACO Deep
32 00'N - 24 43'W
GEBCO-SCGN/6 - Deepest part of CANARY Basin
MONO Rise
12 00'N - 80 00'W
MONSOON Seamount
14 20'N - 163 02'W
MONTAGUE Seamount
20 15'S - 36 45'W
MONTEREY Canyon
36 40'N - 122 05'W
MONTEREY Fan
36 00'N - 123 30'W
MOONLESS Seamounts
30 45'N - 142 30'W to 28 50'N - 135 45'W
* and INT Charts = Mountains
MOORE Seamount
48 53'N - 136 00'W
MORESBY Canyon
50 40'N - 132 35'W to 53 15'N - 130 35'W
MORESBY Seachannel
46 40'N - 138 10'W to 50 00'N - 135 00'W
* (June 1984) - Replaces MORESBY Channel, GEBCO = Channel
MORESBY Seamount
9 49'S - 151 34'E
GEBCO-SCGN - July 1988
MORETON Seamount
26 05'S - 154 55'E
MORGAN Bank
23 28'N - 111 10'W
MORGAN Reef
17 00'S - 36 10'W
MORNINGTON Abyssal Plain
53 00'S - 86 00'W
MORNINGTON Channel
49 00'S - 79 30'W
MOROZKO Seamount
45 10'N - 158 15'E
MORTON Bank
11 45'S - 176 25'E
MORTON Seamount
50 15'N - 142 30'W
MOSER Seamount
49 29'N - 136 55'W
MOSES Reef
22 45'S - 151 10'W
MOSHESH Fracture Zone
54 15'S - 4 55'E
MOUA-PIHAA Bank
18 18'S - 148 32'W
MOUCHOIR Bank
20 57'N - 70 42'W
MOUNT ERROR Guyot
10 17'N - 56 01'E
GEBCO-SCGN/6, * = ERROR Tablemount, INT Charts = ERROR Seamount
MOZAMBIQUE Basin
29 00'S - 40 00'E
* = NATAL Basin
MOZAMBIQUE Plateau
27 00'S - 36 00'E to 34 30'S - 34 00'E
MOZAMBIQUE Scarp
29 00'S - 37 00'E to 40 00'S - 33 45'E
* = Escarpment
MOZART Seamount
28 40'N - 161 43'W
MUERTOS Trough
17 10'N - 68 00'W
MUIR Seamount
33 41'N - 62 30'W
11-12-13-403
MUIRFIELD Bank
13 10'S - 96 05'E
GEBCO-SCGN/7 * (August 1985) = Reef
MUKLUK Channel
48 00'N - 141 45'W
MURMANSKOYE Rise
70 30'N - 36 30'E
INT Charts = SKOLPEN Bank, GEBCO = MURMAN Rise (see also SKOLPEN Bank)
MURRAY Canyon
65 45'S - 73 00'E
51 30'N - 176 50'E
MURRAY Fracture Zone
29 00'N - 155 00'W to 33 25'N - 130 00'W
MURRAY Ridge
21 00'N - 61 00'E to 23 30'N - 64 00'E
MURRAY Seamount
54 00'N - 148 30'W
MUSASI Bank
44 40'N - 140 25'E
* = MUSASHI Banks
MUSICIANS Seamounts
26 00'N - 158 00'W to 33 00'N - 166 00'W
MUSSAU Trough
1 00'N - 148 50'E
* = Trench
MUSORGSKI Seamount
30 22'N - 163 50'W
* and INT charts = MUSSORGSKY
MYRSETH Bank
71 26'N - 2 50'W
10-100-113
MYTILUS Seamount
39 22'N - 67 09'W
NADESHDA Basin
30 00'N - 148 00'E
* (AUG.1985) = NADEZHDA GEBCO-SCGN/6
NAMIIBIA Abyssal Plain
30 15'S - 5 30'E
NANKAI Trough
32 15'N - 135 15'E
NANSEI SYOTO Ridge
25 15'N - 126 00'E
NANSEI SYOTO Trench
24 30'N - 127 25'E
NANSEN Basin
84 00'N - 20 00'E to 84 00'N - 90 00'E
NAPIER Seamount
15 45'N - 110 48'W
NARES Abyssal Plain
23 30'N - 64 30'W
NARES Bank
11 30'N - 116 10'E
NATAL Seamount
37 26'S - 22 13'E
21-72-204
NATAL Valley
32 00'S - 32 30'E
700
NATURALISTE Fracture Zone
31 30'S - 105 45'E to 35 30'S - 110 00'E
NATURALISTE Plateau
34 00'S - 111 30'E
NAUK :
See AKADEMII NAUK Rise
NAVARIN Canyon
60 45'N - 179 15'E
NAVIDAD Bank
20 00'N - 68 50'W
NAZARETH Bank
14 30'S - 60 45'E
702
NAZCA Ridge
16 00'S - 77 00'W to 23 00'S - 83 00'W
NECKER Ridge
21 45'N - 167 45'W
NEILSON Reef
27 03'S - 146 03'W
NERO Seamount
27 57'N - 177 58'W
NEVA Shoal
26 00'N - 173 55'W
NEW Bank
15 50'N - 78 40'W
18 00'N - 78 05'W
NEW BRITAIN Trench
6 00'S - 152 30'E
NEW CALEDONIA Basin
20 00'S - 162 30'E to 32 00'S - 165 00'E
NEWELL Seamount
16 50'N - 154 45'W
NEW ENGLAND Seamounts
37 30'N - 60 00'W
NEWFOUNDLAND Basin
42 30'N - 43 00'W
11-13-14-404
NEWFOUNDLAND Ridge
40 30'N - 48 00'W
NEWFOUNDLAND Seamounts
43 50'N - 45 00'W
11-13
NEWFOUNDLAND :
See GRAND BANKS OF NEWFOUNDLAND
NEW GUINEA Basin
3 30'S - 145 30'E
NEW GUINEA Trench
0 20'S - 136 45'E
NEW HEBRIDES :
See NORTH NEW HEBRIDES Trench and SOUTH NEW HEBRIDES Trench
NEWTON Seamount
16 05'N - 111 35'W
NIAS Basin
1 15'N - 98 00'E
* (Oct.1986) GEBCO-SCGN/7
NICARAGUA Rise
16 20'N - 80 30'W
* = NICARAGUAN Rise
NICHOLS Seamount
42 50'N - 133 13'W
NICOBAR Fan
4 00'N - 92 00'E to 5 00'S - 93 00'E
5.06, 5.09
NICOBAR-SIMEULUE Basin
5 00'N - 94 30'E
NIERENBERG Seamount
44 19'N - 142 07'W
NIGER Cone
4 00'N - 4 00'E
5.05, 5.08, 5.12
* (Sept.1983) = Fan
NIKITIN :
See AFANASY NIKITIN Seamount
NIKKO Seamount
23 05'N - 142 19'E
NILE Fan
32 30'N - 31 00'E
NINETYEAST Ridge
7 00'N - 90 00'E to 27 00'S - 87 30'E
5.05, 5.06, 5.09
70-71-73-706-707
* Correct spelling of this name is one word.
NIGINI Guyot
41 44'N - 170 12'E
NINTOKU Guyot
40 55'N - 170 40'E
* and INT Chart=Seamount
NIOBE Seamount
16 20'N - 84 57'W
401-811
NITINAT Fan
47 55'N - 127 00'W
NORDENSKJOLD Basin
76 00'S - 165 00'E
NORDKAPP Bank
72 05'N - 26 15'E
NORFOLK Basin
31 20'S - 169 10'E
* = GAZELLE Basin
NORFOLK Ridge
27 00'S - 167 30'E
* AUS.proposal: NORTH NORFOLK Ridge
NORFOLK Trough
35 50'S - 168 00'E
NORFOLK :
See WEST NORFOLK Ridge
NORTH AMERICAN Basin
30 00'N - 60 00'W
12-13-400-403
NORTHAMPTON Seamount
11 35'N - 168 28'W
NORTHAMPTON Seamounts
25 20'N - 172 04'W
NORTH AUSTRALIA Basin :
See ARGO Plain
NORTH BANDA Basin
3 30'S - 125 0'E
NORTH BRASILIAN Ridge
0 20'N - 41 15'W to 1 45'S - 37 00'W
* = BELEM Ridge, PARNAIBA Ridge and CEARA Seamounts
NORTHEAST Bank
32 20'N - 119 40'W
NORTHEAST GEORGIA Rise
52 00'S - 33 15'W
UK chart 4213
NORTHERN HOLIDAY Seamount
29 33'N - 147 45'W
NORTH FIJI Plateau
18 00'S - 174 00'E
5.00, 5.10
* = Basin (or WEST FIJI Plateau?)
NORTH HAWAIIAN Seamounts :
See MUSICIANS Seamounts
NORTH KANIN Bank
70 30'N - 42 50'E
NORTH MAGELLAN Rise
12 30'N - 177 00'W
NORTH NEW HEBRIDES Trench
12 30'S - 165 50'E
60-61-604
NORTH SCOTIA Ridge
53 50'S - 52 45'W to 53 20'S - 44 00'W
UK Chart 4213
NORTH TOKELAU Basin
4 30'S - 167 30'W
* (January 1985 - Not Trough) GEBCO-SCGN/6
NORTH TRINCO Canyon
8 52'N - 81 25'E
NORTHWEST ATLANTIC MID-OCEAN Channel
59 30'N - 54 30'W to 51 00'N - 44 00'W
* = Canyon
NORTHWEST GEORGIA Rise
52 45'S - 37 15'W
NORTHWEST HAWAIIAN Ridge :
GEBCO-SCGN/6 (Replaces NORTHWEST HAWAIIAN Ridge) See LILIUOKALANI Ridge
NORTHWEST PACIFIC Basin
34
NORTHWEST PACIFIC Rise :
See SHATSKY Rise
NORTHWIND Abyssal Plain
76 30'N - 160 00'W
NORTHWIND Ridge
76 00'N - 157 30'W
NORWEGIAN Basin
67 00'N - 4 00'W to 70 00'N - 5 00'E
5.01, 5.04, 5.17
NORWEGIAN Deep
59 30'N - 4 20'E
* (Dec.1985) = Trough
NOVA Bank
22 35'S - 159 12'E
NOVA CANTON Trough
4 30'S - 179 30'W to 0 00' - 165 30'W
52-60-61-617
* = NOVA Trough GEBCO-SCGN/6
NOVARA Knoll
43 00'S - 74 30'E
70-72-73
NOVA Trough:
See NOVA CANTON Trough
NOVAYA ZEMLYA Trough
74 00'N - 60 00'E
* EAST NOVAYA ZEMLYA Trough
NOVELTY Shoal
16 45'N - 169 20'W
NOYO Canyon
39 31'N - 124 20'W
NOYES Canyon
55 10'N - 134 22'W
500-501
OATES Bank
70 15'S - 165 15'E
OATES Canyon
69 10'S - 164 30'E
OB Canyon
64 30'S - 93 30'E
OB Seamount
52 30'S - 41 30'E
OB Trench
32 50'S - 98 15'E
OBRUCHEV Rise
50 30'N - 168 00'E to 54 00'N - 164 OO'E
OCEANA Bank
8 30'N - 115 20'W
OCEANOGRAPHER Canyon
40 00'N - 68 00'W
OCEANOGRAPHER Fracture Zone
36 00'N - 40 00'W to 34 20'N - 32 00'W
ODESSEY Seamount
54 30'N - 149 45'W
OGASAWARA Plateau
26 00'N - 144 00'E
OGASAWARA Ridge
27 15'N - 142 30'E
OGASAWARA Trough
28 00'N - 141 20'E
*(March 1985) GEBCO-SCGN/6.
OGLALA Seamount
50 18'N - 131 28'W
O'GORMAN Fracture Zone
14 30'N - 109 30'W to 15 30'N - 98 30'W
GEBCO-SCGN/6:Formerly WEST and EAST O'GORMAN Fracture Zone
OJIN Guyot
38 00'N - 170 30'E
OKEANOLOGII :
See INSTITUTA OKEANOLOGII Rise
OKI-DAITO Ridge
23 45'N - 133 00'E
OKINAWA Trough
26 00'N - 125 40'E
OKI Ridge
36 50'N - 134 40'E
OLIVOS Bank
36 32'N - 2 50'W
OLYMPUS Knoll
45 25'N - 27 40'W
OMAN Basin
23 30'N - 61 00'E
*= Plain, INT Charts = Basin
ONA Basin
59 15'S - 56 00'W
*(June 1987)
O'NEILL Bank :
See ORNE (Banc de l')
ONE SOUTH Fracture Zone :
GEBCO-SCGN/7, See  ROMANCHE Fracture Zone
ONTONG-JAVA Rise
2 00'N - 156 00'E to 8 00'S - 162 30'E
* KAPINGAMARANGI Rise, GEBCO-SCGN/6 = formerly SOLOMON Rise
ORANGE Canyon
31 50'S - 13 00'E
ORANGE Cone
31 45'S - 11 30'E
* = Fan.
ORCADAS :
See  ISLAS ORCADAS Fracture Zone, ISLAS ORCADAS Rise and ISLAS ORCADAS Seamount
ORKNEY Deep
60 45'S - 40 00'W
ORMONDE Seamount
36 40'N - 11 10'W
ORNE (Banc de l') or O'NEILL Bank
22 30'S - 168 55'E
OROZCO Fracture Zone
15 30'N - 104 30'W
ORPHAN Knoll
50 3O'N - 46 30'W
11-405
ORTELIUS Fracture Zone
25 00'N - 162 45'E
*(September 1984) GEBCO-SCGN/6.
OSBORN Plateau
15 00'S - 87 00'E
OSBOURN Seamount
26 00'S - 175 00'W
* = OZBOURN
OSHAWA Seamount
52 22'N - 134 05'W
OSPREY Reef
14 00'S - 146 40'E
OST Bank
67 30'N - 30 00'W
OUEST Fracture Zone
56 10'S - 57 00'W to 56 50'S - 53 15'W
OUTER BAILEY Bank :
See  LOUSY Bank
OWEN Bank
6 47'S - 70 14'E
70-71-72-73-702-703
* INT charts = Reported 1811
OWEN Fracture Zone
5 00'N - 53 30'E to 23 00'N - 62 45'E
OZIN Seamount
38 15'N - 171 00'E
PACIFIC-ANTARCTIC Ridge
65 30'S - 178 00'W to 55 00'S - 138 00'W
5.14, 5.15, 5.18
PACIFIC-ANTARCTIC Rise
45 00'S - 120 00'W
PACIFIC :
See CENTRAL PACIFIC Basin, EAST PACIFIC Rise, MID-PACIFIC Seamounts, NORTHWEST PACIFIC Basin, and SOUTHWEST PACIFIC Basin
PAGANINI Seamount
28 41'N - 162 40'W
PAISLEY Seamount
14 05'S - 41 30'E
PALAU Trench
6 20'N - 134 00'E to 8 00'N - 135 10'E
PALAU :
See  KYUSYU-PALAU Ridge
PALAWAN Trough
8 00'N - 115 30'E
PALINURO Seamount
39 30'N - 14 48'E
PALMER Seamount
18 38'N - 156 35'W
PANAMA Basin
4 00'N - 83 00'W
PANAMA Fracture Zone
5 30'N - 82 40'W
PANDORA Bank
12 00'S - 172 10'E
PANZARINI Seamount
40 00'S - 11 45'E
PAPATUA Seamount
2 08'N - 124 54'E
PAPP Seamount :
See  THE PAPS Seamount
PAPUA Abyssal Plain
14 00'S - 152 00'E
* = Plain (November 1986)
PAPUA Plateau
10 45'S - 146 00'E
PARA Abyssal Plain
6 00'N - 42 00'W
PARAIBA Seamount
7 30'S - 33 10'W
12-13-202
PARAMOUNT Seamount
3 20'N - 90 45'W
PARECE VELA Basin
18 00'N - 139 00'E
* = WEST MARIANA Basin, INT Charts = WEST MARIANA Basin (See also WEST MARIANA Basin)
PARKER Seamount
52 35'N - 151 15'W
PARKS Seamount
44 14'N - 129 56'W
PARNAIBA Ridge
1 45'S - 37 00'W
12
PASCAL Seamount
15 49'N - 111 15'W
PASTOURET Spur
48 38'N - 13 30'W
GEBCO-SCGN - June 1988
PATHFINDER Seamount
50 55'N - 143 15'W
PATTON Escarpment
32 20'N - 120 00'W
PATTON Seamount
54 37'N - 150 25'W
PATTON Seamounts
54 50'N - 152 50'W to 54 00'N - 147 15'W
PAUL Seamount
23 26'N - 172 36'W
PAZ (Banco de la)
21 15'N - 79 48'W
* = PAZ Bank
PEARL AND HERMES Reef
27 50'N - 175 50'W
PEDRO Bank
17 00'N - 78 30'W
12-13-400-401-402-403-811
PEIRCE Seamount
53 44'N - 136 32'W
PELSAERT Seamount
31 15'S - 108 50'E
PENGUIN Bank
11 25'S - 175 30'E
21 02'N - 157 30'W
PENNELL Bank
74 30'S - 180 00'
* UK Chart 4065
PENRHYN Basin
9 00'S - 155 30'W
61-617
PENSACOLA Seamount
18 17'N - 157 20'W
PERNAMBUCO Abyssal Plain
7 30'S - 27 00'W
PERNAMBUCO Plateau
8 10'S - 34 15'W
12-13-202-215
* (March 1985) (See also RECIFFE Plateau) INT 202-215 = RECIFE Plateau
PERNANBUCO Seachannel
12 00'S - 33 15'W
PERNAMBUCO Seamounts
8 30'S - 32 00'W to 9 25'S - 29 50'W
12-20-202-215
PERRET Seamount
19 28'N - 157 19'W
PERSEJ Bank
78 00'N - 36 00'E
INT 10 = PERSEUS Bank, GEBCO-SCGN/7 = PERSEJ
PERTH Basin
30 00'S - 110 00'E
PERTH Canyon
32 00'S - 115 00'E
PERU Basin
14 00'S - 83 00'W
PERU-CHILE Trench
6 00'S - 81 50'W to 39 00'S - 75 00'W
PERVENETS Canyon
59 30'N - 178 00'W
* (September 1984) GEBCO-SCGN/6.
PESCADERO Trough
23 55'N - 108 45'W
PETACALCO Canyon
17 30'N - 102 00'W
PETELIN Seamount
22 49'S - 160 51'W
GEBCO-SCGN/7.
PETERSEN Bank
65 45'S - 110 20'E
PETERS Ridge
50 33'N - 137 30'W
50-500-801-810
PETREL Bank
52 10'N - 179 50'E
24 39'N - 112 47'W
PETREL Spur
52 35'N - 179 30'W
PHILIPPI Canyon
65 45'S - 78 30'E
PHILIPPINE Basin
16 00'N - 130 00'E
PHILIPPINE Trench
10 00'N - 126 45'E
PHYSALIA Seamount
39 51'N - 66 57'W
PICO Fracture Zone
39 00'N - 40 00'W to 37 30'N - 32 00'W
PICKET Seamount
39 38'N - 65 58'W
PICKLE Bank
20 25'N - 80 25'W
PILLSBURY Seamount
0 25'N - 17 05'W
12-14-21-209-215
PINTA Bank
0 45'N - 90 44'W
PIONEER Fracture Zone
36 30'N - 151 00'W to 38 40'N - 127 30'W
PIONEER Seamount
37 21'N - 123 25'W
PIONEER Tablemount
26 00'N - 173 26'W
PITT Bank
7 10'S - 71 25'E
PLANTAGENET Bank
31 59'N - 65 11'W
400-403
PLATO Seamount
33 15'N - 29 35'W
PLINY Trench
34 25'N - 26 05'E
POBEDA Canyon
63 00'S - 99 10'E
POCHNOI Canyon
52 00'N - 179 30'W
POCKLINGTON Trough
11 30'S - 155 40'E
POINCARE Seamount
5 15'N - 111 20'W
POLARSIRKEL Valley
64 50'S - 8 00'E
POLE Abyssal Plain
87 00'N - 120 00'E
POPCORN Ridge
29 26'N - 117 40'W
PORCUPINE Abyssal Plain
49 00'N - 16 00'W
PORCUPINE Bank
53 20'N - 13 40'W
PORCUPINE Seabight
50 30'N - 13 00'W
PORTLAND Bank
23 40'S - 134 25'W
PORTLOCK Bank
58 20'N - 150 30'W
POSADOVSKY Canyon
65 40'S - 89 30'E
POWELL Basin
62 00'S - 50 00'W
POWERS Seamount
19 37'N - 158 55'W
POYDENOT Shoal
9 50'S - 62 00'E
PRATT Guyot
56 15'N - 142 30'W
PRESIDENT JACKSON Seamount
42 33'N - 127 48'W
PRESIDENT THIERS Bank
24 40'S _ 145 55'W
PRESTRUD Bank
77 25'S - 159 30'W
PRIBILOF Canyon
56 15'N - 168 25'W to 55 30'N - 171 00'W
PRINCE ALBERT Sound
70 20'N - 115 45'W
PRINCE EDWARD Fracture Zone
47 30'S - 34 30'E to 42 00'S - 36 30'E
PRINCESSE ALICE Bank
38 5'N - 29 15'W
11-12-14-103
PRINCESS ELIZABETH Trough
64 10'S - 83 00'E
PRITCHETT Seamount
50 20'N - 161 05'W
50-810-813
PROA Seamount
11 20'N - 163 50'W
PROKOFYEV Seamount
25 51'N - 157 53'W
INT charts = PROKOFIEV
PROTEA Seamount
36 50'S - 18 10'E
PROTECTOR Basin
59 00'S - 49 00'W
PROTECTOR Shoal
55 59'S - 28 10'W
PROVENCAUX Bank
35 34'N - 2 27'W
PROVIDENCE Reef
9 30'S - 51 15'E
PTOLEMY Basin
27 30'N - 156 30'E
* (Septembre 1984) GEBCO-SCGN/6.
PUCCINI Seamount
32 15'N - 162 21'W
PUERTO RICO Trench
19 30'N - 68 30'W to 19 15'N - 62 00'W
PUKAKI Rise
49 30'S - 171 40'E
PUTNAM Seamount
51 33'N - 160 25'W
PUYSEGUR Trench
46 15'S - 165 10'E to 49 20'S - 163 45'E
5.10, 5.14
* GEBCO-SCGN/6 (formerly Trough)
QUEBRADA Fracture Zone
3 30'S - 107 00'W to 4 00'S - 101 00'W
QUEENSLAND Guyot
27 30'S - 155 06'E
QUEENSLAND Plateau
16 00'S - 150 00'E
60
QUEIROS Seamount
10 00'N - 108 50'W
QUINN Seamount
56 15'N - 145 15'W
QUIROS Fracture Zone
22 30'S - 100 00'W to 22 00'S - 92 00'W
* = QUEIROS
QUITA SUENO Bank
14 20'N - 81 15'W
RACHMANINOV Seamount
29 35'N - 163 24'W
* and INT charts = RACHMANINOFF
RAFF Seamounts
44 09'N - 141 48'W
RAITA Bank
25 37'N - 169 27'W
RAITT Seamount
42 39'N - 143 03'W
RANGER Bank
28 34'N - 115 30'W
RAPANO Ridge
26 40'N - 159 00'W
RAT ISLAND Canyon
51 30'N - 177 51'E
RAUKUMARA Plain
37 00'S - 178 30'E
RAVEL Seamount
27 16'N - 161 40'W
RECIFE Plateau
* = Discontinued (June 1985) (See also PERNAMBUCO Plateau) INT 12-13 = PERNAMBUCO Plateau
RECORDER Guyot
25 10'S - 154 55'E
REED Bank
11 20'N - 116 45'E
507-508
REINGA Ridge
33 20'S - 170 00'E
RENE Reef
16 44'N - 179 00'E
RENNICK Trough
69 25'S - 162 00'E
RESEARCHER Ridge
15 00'N - 50 00'W
RESEARCHER Seamount
27 50'N - 67 50'W
RESERVE Bank
43 30'S - 177 00'E
RETRIEVER Seamount
39 48'N - 66 15'W
REUNION Trench
24 00'S - 53 00'E
REVELLE Guyot
19 35'N - 179 30'E
REVERE Channel
49 15'N - 129 20'W
REYKJANES Ridge
57 00'N - 34 00'W to 63 00'N - 25 00'W
11-14-102-112
RHODES Basin
35 55'N - 28 35'E
RHONE Fan
42 30'N - 5 00'E
RIBATSCHI Bank
69 50'N - 33 30'E
RICHARDSON Seamount
40 12'S - 14 41'E
RICHARDS Seamount
42 50'N - 136 27'W
RIEMANN Seamount
12 03'N - 110 04'W
RIGAULT DE GENOUILLY Shoal
19 15'S - 151 30'W
RIO DE LA PLATA Canyon
36 45'S - 52 45'W
RIO GRANDE Abyssal Plain
36 00'S - 35 00'W
RIO GRANDE Fracture Zone
29 30'S - 22 00'W to 27 30'S - 4 00'W
INT Charts = 28 S - 31 W
RIO GRANDE Gap
30 30'S - 39 15'W
20-22-201
* (see also VEMA Channel) INT 20 and 22 = VEMA Channel, INT 201 = RIO GRANDE Channel
RIO GRANDE Plateau
31 00'S - 35 00'W
RIONAL Reef
17 16'N - 177 16'E
RITSCHER Canyon
68 15'S - 30 00'E
RIVERA Fracture Zone
19 10'N - 108 20'W
ROBBIE Ridge
10 30'S - 175 30'W
52-60-605-617
ROCARD :
See Yves ROCARD Seamount
ROCKALL Bank
55 30'N - 17 15'W to 58 10'N - 13 30'W
ROCKALL Plateau
56 20'N - 18 50'W
* = Rise (59 N - 14 W)
ROCKALL Trough
53 30'N - 15 40'W to 56 20'N - 12 00'W
ROCKALL :
See HATTON-ROCKALL Basin
ROCKAWAY Seamount
36 10'N - 52 15'W
RODRIGUES Ridge
19 30'S - 61 50'E
* = RODRIGUES, GEBCO and INT Charts = RODRIGUEZ, GEBCO-SCGN/6
RODROGUEZ Seamount
34 03'N - 121 04'W
50-801-802
ROE Bank
10 10'N - 96 40'E
71-73-706
ROGERS Seamount
17 00'S - 37 00'W
INT 202 (Brazil) = RODGER Bank
ROGGEVEEN Basin
31 30'S - 96 30'W
ROGGEVEEN Rise
31 15'S - 90 30'W
ROHAN Seamount
54 45'N - 22 20'W
ROMANCHE Fracture Zone
1 00'S - 28 00'W to 1 00'N - 15 00'W
215
ROMANCHE Gap
0 20'S - 18 00'W
12-14-21-209
RONCADOR Bank
13 32'N - 80 03'W
ROO Rise
12 15'S - 111 30'E
ROSALIND Bank
16 30'N - 80 30'W
ROSARIO Bank
18 30'N - 84 05'W
ROSA Seamount
26 12'N - 114 58'W
ROSE Bank
11 00'S - 179 45'E
ROSEMARY Bank
59 12'N - 10 15'W
ROSENGARTEN
63 30'N - 12 10'W
ROSS Bank
76 45'S - 175 30'E
ROSS Canyon
75 00'S - 163 10'W
ROSSINI Seamount
32 12'N - 163 00'W
ROST Bank
68 25'N - 12 25'E
ROWLEY Reefs
17 20'S - 119 20'E
* = Shoals
ROWLEY Shelf
18 45'S - 118 30'E
ROYAL Trough
16 10'N - 49 20'W
R.S.A. Seamount
39 30'S - 6 30'W
RUDE Knoll
51 00'N - 170 00'W
RUMBLE III Seamount
35 45'S - 178 30'E
RUSSER Bank
75 45'N - 13 00'E
RYOHU-DAINI Seamount
40 38'N - 146 50'E
* = SMETANIN Seamount
RYOHU Seamount
38 00'N - 145 58'E
* RYOFU Seamount
SAAVEDRA Seamount
10 18'N - 107 40'W
SABA Bank
17 30'N - 63 30'W
SAGITTARIUS Seachannel
48 45'N - 158 30'W to 53 00'N - 156 30'W
SAGLEK Bank
59 00'N - 61 30'W
SAHARAN Seamounts
25 30'N - 20 00'W
SAHUL Banks
12 20'S - 123 30'E to 10 50'S - 126 15'E
603
SAHUL Shelf
14 30'S - 124 00'E to 11 30'S - 129 00'E
ST. ANNA Trough :
* See  SVYATAYA ANNA Trough, GEBCO-SCGN/7
ST. HELENA Fracture Zone
17 30'S - 19 00'W to 16 00'S - 8 00'W
ST. LAZARUS Bank
12 15'S - 41 30'E
SAINT PAUL Fracture Zone
0 30'N - 30 00'W to 1 30'N - 17 00'W
13-215-216
ST. PIERRE Bank
39 00'S - 77 45'E
SAINT ROGATIEN Bank
24 20'N - 167 08'W
SALA Y GOMEZ Ridge
26 00'S - 100 00'W to 25 00'S - 88 00'W
SALDANHA :
See  ALMIRANTE SALDANHA Seamount
SALMON Bank
27 00'N - 176 30'W
SALSIPUEDES Basin
29 15'N - 113 30'W
SAMOA Basin
16 30'S - 165 00'W
SAMOAN Passage
9 30'S - 168 45'W
SANAE Canyon
68 30'S - 2 45'W
SANAK Bank
54 16'N - 162 00'W
810-813
SAN CLEMENTE Basin
32 15'N - 117 50'W
SANDERS Seamount
52 35'S - 1 55'E
SAN DIEGO Trough
32 40'N - 117 35'W
SANDWICH :
See  SOUTH SANDWICH Fracture Zone and SOUTH SANDWICH Trench
SAN JOSE Canyon
22 45'N - 109 50'W
SAN JUAN Seamount
33 02'N - 121 00'W
SAN MARTIN Canyon
67 20'S - 47 35'W
SAN MARTIN Seamounts
58 30'S - 95 00'W
SAN NICOLAS Basin
33 03'N - 119 05'W
SAN PABLO Canyon
27 15'N - 114 35'W
SAN PEDRO MARTIR Basin
28 20'N - 112 30'W
SANPUKU Seamount
22 52'N - 142 40'E
SAN QUINTIN Basin
30 00'N - 116 40'W
SANTA CRUZ Basin
33 40'N - 119 33'W
SANTA LUCIA Bank
43 35'N - 9 30'E
34 50'N - 121 24'W
SANTA LUCIA Escarpment
34 30'N - 121 42'W
SANTA MONICA Canyon
33 55'N - 118 38'W
SANTOS Plateau
26 30'S - 42 30'W
* INT Charts = SAO PAULO Plateau
SAO PAULO Channel
28 30'S - 40 30'W
SAO PAULO Fracture Zone
0 30'N - 29 00'W to 1 30'N - 18 30'W
215-216
GEBCO 5.08-5.12 = SAINT PAUL Fracture Zone
SAPMER Seamount
36 48'S - 52 07'E
SARDINO-BALEARIC Plain
39 30'N - 6 30'E
SARMIENTO Ridge
5 40'S - 82 40'W
SARS Seamount
59 45'S - 69 00'W
* = Bank, INT Chart = Bank
SAUNDERS Basin
76 50'S - 155 00'W
SAURY Seamount
12 30'N - 80 55'W
SAXTON Seamount
47 24'N - 157 30'W
SAVU Basin
9 30'S - 122 45'E
SAYA DE MALHA Bank
8 20'S - 60 10'E to 11 15'S - 61 50'E
SCARLATTI Seamount
27 37'N - 160 15'W
SCHAEFER Seamount
43 00'N - 132 26'W
SCHJETMAN Reef
16 08'N - 178 57'W
SCHMITT-OTT Seamount
39 26'S - 13 45'E
SCHOPPE Ridge
51 10'N - 139 30'W
SCHOTT Seamount
48 39'N - 155 52'W
SCHUBERT Seamount
31 56'N - 162 09'W
SCHULZ Bank
73 52'N - 7 30'E
SCHUMANN Seamount
25 42'N - 160 11'W
SCHWABENLAND Canyon
66 35'S - 18 00'E
SCHWABENLAND Seamount
46 00'S - 0 10'E
SCOTIA :
See  NORTH SCOTIA Ridge, SOUTH SCOTIA Ridge and WEST SCOTIA Ridge
SCOTT Canyon
71 35'S - 179 00'E
SCOTT Seachannel
49 55'N - 133 00'W
SCOTT Seamount
50 25'N - 141 20'W
SCOTT Seamounts
68 00'S - 179 50'W
* SCOTT ISLAND Bank
SCOTT Shoal
73 14'S - 177 45'E
SCRIPPS Guyot
23 50'N - 159 23'E
SCULPIN Ridge
18 00'N - 169 00'W to 13 00'N - 165 00'W
SEADRAGON Ridge
12 30'N - 158 45'W
SEAGULL Shoal
4 45'S - 54 10'E
SEALARK Fracture Zone
7 30'S - 65 30'E to 2 30'S - 69 30'E
SEAMAP Channel
51 45'N - 162 20'W
SEDLO Seamount
40 25'N - 26 55'W
SEDNA Ridges
47 30'N - 143 16'W
SEGUNDO Seamount
13 00'N - 165 05'W
SEINE Abyssal Plain
34 00'N - 12 30'W
SEINE Seamount
33 50'N - 14 20'W
SELFRIDGE Bank
20 55'S - 157 05'E
SELKIRK Rise
38 00'S - 81 15'W
SEMINOLE Seamount
49 46'N - 129 50'W
SENGFELLER Seamount
49 50'N - 157 45'W
SENGHOR Seamount
17 10'N - 21 55'W
Source : Woods Hole Oceanographic Institution
SENTINELLA Bank
38 02'N - 9 43'E
SERAM Trough
3 00'S - 131 20'E
* = CERAM
SERMILIK Deep
64 40'N - 38 05'W
* = Valley
SERRANA Bank
14 23'N - 80 12'W
SERRANILLA Bank
15 50'N - 79 50'W
SESOSTRIS Bank
13 05'N - 72 00'E
SEVER Spur
79 40'N - 118 00'W to 82 00'N - 128 00'W
SEYCHELLES Bank
5 00'S - 56 00'E
SHACKLETON Canyon
75 15'S - 166 00'W
SHACKLETON Fracture Zone
59 00'S - 61 00'W to 60 40'S - 56 30'W
SHACKLETON Seamount
36 57'S - 22 45'E
SHAKA Fracture Zone
53 30'S - 9 00'E
SHAKA Ridge
51 45'S - 11 50'E
SHALOVICH Seamount
46 09'N - 135 12'W
* and INT charts = SHALOWITZ
SHANNON Seamount
43 00'S - 2 30'E
SHATSKIY Rise
31 00'N - 156 00'E to 43 30'N - 167 30'E
SHCHERBAKOV Seamount
10 55'S - 104 40'E
707-708
SHEBA :
See EAST SHEBA Ridge and WEST SHEBA Ridge
SHELDRAKE Seamount
38 25'N - 62 10'W
SHEPARD Guyot
19 10'N - 179 45'W
SHEPHERD Seamount
17 32'N - 154 07'W
SHETLAND :
See FAEROE-SHETLAND Channel and SOUTH SHETLAND Trench
SHIMADA Seamount
16 52'N - 117 31'W
* GEBCO 5.07 = SHAMADA
SHIRASE Basin
76 40'S - 158 00'W
SHIRSHOV Ridge
58 15'N - 170 45'E
SHONA Ridge
51 00'S - 2 45'E
SHOR Seamount
42 30'N - 133 05'W
SHORTLAND Canyon
59 00'N - 45 00'W
* = 43 50'N - 58 15'W, GEBCO-SCGN/6
SHOSTAKOVICH Seamount
33 16'N - 164 53'W
SHOWA Guyot
43 00'N - 170 30'E
SHULEYKIN Seamount
41 15'N - 163 15'E
SHUMAGIN Bank
54 39'N - 159 22'W
SIBELIUS Seamount
27 13'N - 160 44'W
SIBERIA Abyssal Plain
86 30'N - 165 00'E
* = FLETCHER Plain
SIBONEY Seamount
33 20'N - 61 40'W
12-13-403
SIERRA LEONE Basin
4 45'N - 17 00'W
14-21-209
SIERRA LEONE Fracture Zone
6 00'N - 37 00'W to 7 00'N - 27 00'W
SIERRA LEONE Rise
8 40'N - 20 10'W
14-21-104-215
SIGSBEE Deep
23 52'N - 91 35'W
* = See MEXICO Basin
SIGSBEE Escarpment
26 00'N - 92 30'W
SIKOKU Basin
29 00'N - 137 00'E
SILVER Bank
20 30'N - 69 45'W
SILVERTOWN Bank
21 25'N - 79 55'W
SIMPSON :
See ERIC SIMPSON Fracture Zone
SINAIA Bank
38 56'N - 25 50'E
SIQUEIROS Fracture Zone
8 30'N - 105 30'W to 9 00'N - 101 00'W
SIRIBESI Seamount
43 33'N - 139 44'E
SIRIUS Bank
4 00'S - 35 55'W
SIRIUS Seamount
52 00'N - 160 50'W
SITITO-OZIMA Ridge
33 15'N - 139 30'E to 26 00'N - 141 00'E
SIXTYMILE Bank
32 03'N - 118 15'W
SKLINNA Bank
65 15'N - 10 15'E
10-101
SKOLPEN Bank
GEBCO = MURMAN Rise (See also MURMANSKOYE Rise)
SMETANIN Seamount
40 40'N - 146 50'E
SMOOK Seamount
55 09'N - 150 07'W
SNOWDEN Seamounts
16 00'N - 156 00'W
SOGA Guyot
43 20'N - 170 00'E
SOHM Abyssal Plain
34 00'N - 55 00'W
11-12
SOLANDER Trough
50 20'S - 164 50'E to 48 50'S - 165 30'E
60-600- 601
SOLEDAD Basin
30 10'N - 117 35'W
SOLEDAD Canyon
23 40'N - 109 32'W
SOLOMON Rise :
See ONTONG-JAVA Rise, GEBCO-SCGN/6
SOLOMON :
See  SOUTH SOLOMON Trench
SOMALI Basin
0 00' - 51 00'E
71-72-701-702-703
SOMALI Plain
5 00'N - 52 30'E
SOMERVILLE Bank
12 40'S - 60 50'E
SONNE Seamount
15 07'N - 156 40'W
* June 1985, GEBCO-SCGN/6
SOQUEL Canyon
36 48'N - 122 00'W
SORBAKKEN
73 47'N - 19 00'E
Island slope
SOUDAN Bank
18 35'S - 58 45'E
SOUTH ADRIATIC Basin
42 00'N - 17 30'E
* and INT Charts = ADRIATIC Basin, GEBCO-SCGN/7
SOUTH AUSTRALIAN Basin
38 30'S - 129 00'E
60-709
* GEBCO = SOUTH AUSTRALIA
SOUTH BANDA Basin
6 30'S - 127 30'E
SOUTH CHINA Basin
14 30'N - 115 30'E
SOUTHEAST INDIAN Ridge
26 00'S - 71 30'E to 61 00'S - 156 00'E
5.09, 5.13, 5.14
SOUTHERN Bank
10 30'N - 116 40'E
SOUTH FIJI Basin
26 00'S - 176 00'E
60-602-605
* Australia proposal : FIJI Basin
SOUTH FIJI Ridge
28 24'S - 179 25'W
* = LAU Ridge
SOUTH INDIAN Abyssal Plain :
See AUSTRALIAN-ANTARCTIC Basin, GEBCO-SCGN/7
SOUTH MAKASSAR Basin
4 15'S - 118 30'E
SOUTH NEW HEBRIDES Trench
17 45'S - 167 20'E to 22 45'S - 174 10'E
60-61-602
* = NEW HEBRIDES Trench
SOUTH ORKNEY Trough
60 10'S - 44 00'W
SOUTH SANDWICH Fracture Zone
60 45'S - 24 00'W to 60 30'S - 17 30'W
SOUTH SANDWICH Trench
57 30'S - 24 00'W
SOUTH SCOTIA Ridge
60 45'S - 53 30'W to 60 45'S - 42 15'W
* (June 1987) Formerly SCOTIA Ridge
SOUTH SHETLAND Trench
61 15'S - 60 00'W
SOUTH SOLOMON Trench
11 20'S - 162 45'E
52-60-604
* INT Charts (AUS) = SOUTH SOLOMONS
SOUTH TASMAN Rise
46 00'S - 146 00'E to 49 00'S - 150 00'E
60-601
* INT Charts = SOUTH TASMANIA Ridge
SOUTH TRINCO Canyon
8 40'N - 81 38'E
SOUTHWEST INDIAN Ridge
27 00'S - 66 30'E to 54 45'S - 0 00'
5.09, 5.13, 5.16
21-70-72-700
SOUTHWEST PACIFIC Basin
23 00'S - 170 00'W to 42 00'S - 132 00'W to 57 00'S - 170 00'E
5.10, 5.11, 5.14
* GEBCO-SCGN-6
SPAR Fracture Zone
69 00'N - 17 40'W
SPEAKERS Bank
5 00'S - 72 20'E
SPIESS Seamount
54 40'S - 0 15'E
SPILHAUS Seamount
42 40'N - 141 45'W
SPITSBERGEN Bank
* GEBCO = BJORNOYA
SPRINGFIELD Seamount
48 04'N - 130 12'W
SRIVASTAVA Seamount
44 31'N - 136 07'W
STALEMATE Bank
53 05'N - 170 55'E
STALEMATE Canyon
52 50'N - 171 25'E
STANDARD Seamount
35 10'S - 157 50'E
STANLEY Seamount
43 08'N - 143 35'W
STEEL VENDOR Seamount
40 23'N - 129 27'W
STEMBEL Knoll
29 07'N - 136 33'W
STETSON Guyot
19 40'N - 176 05'E
* (January 1985) GEBCO-SCGN-6
STEVENS Seamount
48 09'N - 158 00'W
STIRNI Seamount
49 08'N - 132 18'W
STOCKS Seamount
12 10'S - 32 00'W
STOKES Bank
38 51'N - 25 20'E
STOR Bank
77 40'N - 33 00'E
STOREGGA
63 00'N - 5 30'E
STOREGG Bank
67 10'S - 64 10'E
STORFJORD Bank
76 35'N - 23 00'E
STORFJORD Deep
67 15'N - 31 00'W
STORFJORD Channel
76 12'N - 19 00'E
STORNESET
63 43'N - 4 50'E
STRADBROKE Seamount
29 05'S - 155 45'E
STRAUSS Seamount
33 18'N - 164 09'W
STRAVINSKI Seamount
31 29'N - 164 36'W
* and INT charts = STRAVINSKY
STREDE Bank
66 50'N - 28 40'W
STVOR Guyot
9 53'S - 5 25'W
* = Seamount(August 1985) GEBCO-SCGN-7
SUB-ANTARCTIC Slope
51 00'S - 177 55'E
SUIKO Guyot
44 35'N - 170 20'E
* = Seamount GEBCO-SCGN-6
SUITCASE Seamounts
21 00'N - 112 30'W
SULU Basin
8 00'N - 121 00'E
SULZBERGER Basin
77 00'S - 152 30'W
SUNDA Shelf
2 00'N - 106 30'E
SUNDA Trench
4 30'S - 100 E to 11 10'S - 119 E
70-71-73-508-603-706-708
* = JAVA Trench GEBCO-SCGN/7
SUNDA Trough
8 30'S - 108 30'E
SUN RAY Seamount
0 32'S - 88 33'W
SUR Canyon
36 06'N - 122 04'W
SURVEYOR Channel
57 20'N - 145 30'W
* = Seachannel, INT 50 = seachannel
SURVEYOR Fracture Zone
43 00'N - 155 00'W to 43 30'N - 150 00'W
SURVEYOR Gap
56 30'N - 144 30'W
SURVEYOR Seamount
56 05'N - 144 20'W
SVERDRUP Canyon
55 25'S - 65 35'W
SVYATAYA ANNA Trough
77 20'N - 70 00'E to 82 30'N - 68 00'E
* GEBCO-SCGN/7 (Formerly St. ANNA)
SWAN Shoal
4 00'S - 54 30'E
SWATCH OF NO GROUND
21 15'N - 89 28'E
* Canyon
SWAZI Seamount
48 20'S - 9 30'E
SWORDFISH Seamount
18 25'N - 158 25'W
SYOYO Seamount
22 29'N - 142 59'E
SYUN-YO Bank
37 09'N - 132 20'E
TADJURA Trough
12 00'N - 44 30'E
TAGUS Basin
37 50'N - 11 40'W
* (September 1983) GEBCO-SCGN/6 (formerly Abyssal Plain)
TAHOMA Canyon
51 45'N - 175 23'E
TAHOMA Reef
51 53'N - 175 50'E
TAIWAN Banks
23 00'N - 118 30'E
* = FORMOSA Reefs
TAKASU Seamount
23 12'N - 141 31'E
TAKUYO-DAIITI Seamount
41 16'N - 145 57'E
* (March 1985) = DAIICHI
TAKUYO-DAINI Seamount
34 17'N - 143 52'E
TAKUYO-DAISAN Seamount
34 13'N - 144 21'E
TAMAYO Fracture Zone
23 00'N - 108 00'W
TAMPEN
61 45'N - 2 00'E
Continental borderland
TANADAK Basin
50 45'N - 179 34'W
TANEY Seamounts
36 45'N - 125 20'W
TANNER Bank
32 42'N - 119 08'W
TANNER Basin
32 52'N - 119 40'W
TASMAN Abyssal Plain
35 00'S - 155 00'E
TASMAN Basin
40 00'S - 155 00'E to 45 00'S - 160 00'E
TASMAN :
See  EAST TASMAN Plateau and SOUTH TASMAN Rise
TATAR Trough
46 00'N - 140 00'E
TAUPO Bank
33 10'S - 156 10'E
* = Tablemount, INT Charts = Seamounts
TAURUS Seachannel
47 30'N - 155 00'W to 53 00'N - 154 00'W
GEBCO-SCGN/6 (formerly Channel)
TAUSSIG Seamount
48 30'N - 158 15'W
TCHAIKOVSKY Seamount
29 23'N - 162 05'W
TEAHITIA Seamount
17 34'S - 148 49'W
TEHUANTEPEC Fracture Zone
11 00'N - 99 30'W to 15 00'N - 96 00'W
TEHUANTEPEC Ridge
13 30'N - 98 00'W
TEHUELCHE Fracture Zone
55 00'S - 49 00'W to 54 30'S - 44 00'W
TEMA Reef
11 00'S - 165 50'W
TENJI Guyot
49 00'N - 168 35'E
53-813
* = Seamount, GEBCO-SCGN/6, INT 53 = TENTI, INT 813 = TENCHI
TERRA NOVA Canyon
68 40'S - 159 00'E
TERRY Seamount
43 24'N - 139 52'W
THARP Fracture Zone
52 00'S - 142 00'W to 57 45'S - 115 00'W
THE GULLY
44 15'N - 59 15'W
THE PAPS Seamount
25 55'N - 20 25'W
14-104
Source : UK/DISCOVERY II - 1962, * and INT 104 = PAPP Seamount
THE SWATCH
23 16'N - 67 16'E
INDUS Canyon
THETA Gap
43 45'N - 12 50'W
THETIS Bank
24 56'N - 112 36'W
THOMPSON Seamount
46 03'N - 128 35'W
THOMSON :
See  WYVILLE THOMSON Ridge
THOR IVERSEN Bank
73 10'N - 34 00'E
THREE KINGS Ridge
32 45'S - 172 30'E to 28 00'S - 173 00'E
* = Rise, INT Charts = Rise
THULEAN :
See  EAST THULEAN Rise and WEST THULEAN Rise
THUNDER Knoll
16 27'N - 81 20'W
* (November 1986) = Bank
THURMOND Knoll
50 51'N - 177 59'E
THURSTON Seamount
17 00'N - 155 58'W
TIBURON Basin
29 00'N - 112 50'W
TIKI Basin
13 30'S - 135 30'W
TIMOR Trough
9 45'S - 127 45'E
TINRO Basin
56 30'N - 153 20'E
TIRU Seamount
20 35'N - 166 57'W
TITOV Seamount
0 30'S - 176 00'W
TITTMAN Seamount
45 10'N - 157 45'W
TOBA Guyot
33 15'N - 171 40'E
TOBAGO Basin
12 30'N - 60 30'W
216-400-402
TOFINO Bank
35 30'N - 3 55'W
TONGA Ridge
25 30'S - 177 00'W to 21 40'S - 175 30'W
TONGA Trench
24 30'S - 175 10'W to 16 00'S - 172 10'W
TONGUE OF THE OCEAN
24 30'N - 77 30'W
* Trough
TOPAZE Bank
4 35'S - 56 25'E
TORRES Seamount
8 31'N - 106 58'W
TOWNSEND CROMWELL Seamount
29 50'N - 179 04'E
TRAENA Bank
66 00'N - 10 00'E
TRAENA Deep
67 06'N - 9 25'E
TRANSKEI Basin
35 00'S - 30 00'E
TREGROSSE Reefs
17 40'S - 150 30'E
TRES MARIAS Basin
20 50'N - 106 25'W
TRINCOMALEE Canyon
8 30'N - 81 15'E
TRINDADE Seachannel
23 00'S - 32 36'W
TRINIDAD Canyon
41 09'N - 124 50'W
TRIPP Seamount
29 37'S - 14 15'E
TRISTAN DA CUNHA Fracture Zone
38 00'S - 25 00'W to 37 30'S - 13 30'W
TROMSO Bank
71 40'N - 18 00'E
* (October 1986) = TROMSOFLAKET
TROPIC Seamount
23 50'N - 20 40'W
TRYAL Ridge
31 00'S - 102 45'E
TUAMOTU Fracture Zone
12 30'S - 127 00'W
TUCKER Seamount
49 50'N - 133 30'W
TUI Seamount
30 20'S - 173 00'E
TURPIE Bank
11 25'S - 175 50'E
TUSCALOOSA Seamount
22 02'N - 157 02'W
TUSIMA Basin
36 30'N - 131 00'E
TYRRHENIAN Basin
39 30'N - 13 00'E
UDINTSEV Fracture Zone
54 00'S - 150 00'W to 59 00'S - 131 00'W
ULLOA Knoll
22 35'N - 108 55'W
ULM Plateau
54 50'N - 176 30'E
UMNAK Basin
52 35'N - 167 50'W
UMNAK Canyon
53 35'N - 170 45'W to 53 20'N - 169 25'W
UMNAK Plateau
54 15'N - 170 15'W
UNALASKA Basin
52 50'N - 166 05'W
UNICORN Bank
34 45'N - 14 30'W
UNIMAK Seamount
53 40'N - 162 30'W
UNION Seamount
49 35'N - 132 40'W
URDANETA Seamount
9 23'N - 111 09'W
URUGUAY Canyon
72 00'S - 39 00'W
VACQUIER Seamount
42 30'N - 139 59'W
VALDIVIA Bank
25 30'S - 6 00'E
VALDIVIA Fracture
42 15'S - 95 00'W to 41 00'S - 84 30'W
VALENCIA Basin
39 20'N - 0 40'E
VALENCIA Trough
40 10'N - 2 00'E
VALERIE Guyot
41 25'S - 164 15'W
VANCE Seamount
45 30'N - 130 40'W
VARIAG Seamount
14 05'S - 106 08'E
VAVILOV Seamount
46 55'N - 150 30'E
39 51'N - 12 35'E
VEMA Channel
* and GEBCO = RIO GRANDE Gap, INT 201 = RIO GRANDE Channel (See also RIO GRANDE Gap)
VEMA Fracture Zone
11 00'N - 46 00'W to 10 30'N - 38 30'W
* (April 1986 = 10 S - 66 30'E)
VEMA Gap
23 30'N - 67 00'W
VEMA Seamount
31 42'S - 8 21'E
VEMA Trench
9 00'S - 67 25'E
VINES Bank
18 50'S - 42 58'E
VENEZUELA Basin
14 00'N - 67 00'W
VENING MEINESZ Seamounts
10 50'S - 101 30'E
70-71-73-707-708
VENUS Bank
40 13'N - 25 00'E
VERCELLI Seamount
41 00'N - 11 05'E
VERDI Seamount
32 09'N - 163 31'W
VERNADSKI Fracture Zone
7 15'N - 30 00'W to 7 15'N - 40 00'W
VERYAN Bank
44 15'S - 176 05'E
VESTBAKKEN
74 23'N - 16 10'E
VESTERIS Seamount
73 30'N - 9 10'W
* (December 1985 = Bank)
VICTORIA Fracture Zone
8 00'N - 175 00'E to 2 00'N - 176 30'E
VIKING Bank
60 20'N - 2 30'E
VITIAZ Fracture Zone
5 30'S - 68 30'E
VITIAZ Seamount
13 30'N - 173 30'W
VITIAZ Trench
10 20'S - 170 20'E
VITIAZ Valley
61 50'N - 176 45'E to 60 45'N - 176 50'E
VITORIA Fracture Zone
19 31'S - 34 05'W
VITORIA Seamount
20 45'S - 37 45'W
VITORIA-TRINDADE Seamounts
20 40'S - 38 00'W to 20 30'S - 30'40'W
* (December 1981) GEBCO-SCGN/6 (formerly Ridge)
VIZCAINO Canyon
39 35'N - 124 28'W
VOGT Guyot
19 50'N - 149 00'E
VOLADOR Seamount
26 32'N - 168 39'W
VOLCAN Bank
9 34'N - 80 23'W
VON HOCHSTETTER Seamount
34 58'S - 81 10'E
VORING Plateau
67 20'N - 3 15'E
VORONIN Trough
80 00'N - 86 00'E
VYSOKAYA Bank
59 43'S - 27 58'W
WACHUSETT Ridge
49 20'N - 135 30'W
WAGNER Seamount
31 46'N - 162 54'W
WAIRUNA Shoal
5 12'S - 162 18'W
51-617
WALKER Seamount
55 07'N - 140 20'W
WALLABY Plateau
22 10'S - 104 40'E
WALLS Plateau
52 15'N - 175 12'E
WALLS Seamount
53 45'N - 156 00'W
* and INT Charts = Knoll
WALTERS Shoals
33 12'S - 43 50'E
* and GEBCO = Shoal
WALTON Bank
17 32'N - 78 19'W
WALVIS Ridge
32 50'S - 1 45'E to 23 30'S - 6 00'E
WANGANELLA Bank
32 30'S - 167 25'E
WARD Basin
51 04'N - 179 48'E
WARWICK Seamount
48 04'N - 132 48'W
WASHINGTON Seamount
18 53'N - 157 58'W
WEBER Basin
5 30'S - 131 00'E
60-603
WEDDELL Abyssal Plain
65 30'S - 40 00'W to 64 00'S - 10 00'W
* = Plain (June 1987)
WELKER Guyot
55 10'N - 140 20'W
WEST CAROLINE Basin
3 30'N - 137 30'E
WEST COCOS Seamount
5 30'N - 88 30'W
WEST EUROPEAN Basin
52 45'N - 28 00'W
WESTFALL Seamount
30 15'N - 120 02'W
WEST MARIANA Basin
* GEBCO = PARECE VELA Basin
WEST MARIANA Ridge
21 30'N - 142 00'E to 14 00'N - 143 00'E
WEST MELANESIAN Trench
* and INT Charts = WEST MELANESIAN, GEBCO = MANUS (See also MANUS Trench)
WEST NORFOLK Ridge
32 00'S - 167 00'E to 34 50'S - 169 20'E
* Aus.proposal : SOUTH NORFOLK Ridge
WEST O'GORMAN Fracture Zone :
GEBCO-SCGN/6, See  O'GORMAN Fracture Zone
WEST SCOTIA Ridge
56 50'S - 56 30'W
WEST SHEBA Ridge
13 00'N - 49 00'E
WEST THULEAN Rise
52 15'N - 41 15'W to 52 00'N - 38 50'W
WHALES BAY Deeps
77 50'S - 170 00'W
* = WHALES BAY Furrows
WHARTON Basin
23 00'S - 93 00'E to 14 00'S - 110 00'E
WHITE MARSH Seamount
53 08'N - 143 29'W
WHITNEY Ridge
51 30'N - 140 00'W
WIGHT Bank
7 25'S - 71 30'E
WILD Canyon
66 00'S - 67 00'E
WILDE Guyot
21 07'N - 163 30'E
WILDER Seamount
8 17'N - 173 25'W
WILKES Fracture Zone
9 00'S - 110 00'W
WILKES Rise
GEBCO-SCGN/6, See ASQUITH Bank
WILKES Seamount
17 10'N - 154 05'W
WILKINS Canyon
65 00'S - 70 00'E
WILLIAM'S Seamounts
53 20'S - 81 15'E
WILSHAW Ridge
16 30'S - 57 15'E to 21 00'S - 53 45'E
WILSON Canyon
70 35'S - 176 15'E
WINI Seamount
19 02'N - 153 52'W
WINSLOW Reef
1 36'S - 174 57'W
WISCONSIN Seamount
21 16'N - 165 08'W
WOODLARK Basin
10 15'S - 153 45'E
WOOD Seamount
17 27'N - 156 05'W
WOODWORTH Seamount
52 15'N - 149 30'W
WORMLEY Seamount
13 45'S - 57 55'E
WRANGEL Abyssal Plain
82 30'N - 170 00'E
WRECKS Reefs
22 10'S - 155 18'E
WUST Seamount
33 50'S - 3 30'W
WYANDOT Seamount
37 45'S - 15 40'E
WYER Seamount
54 25'N - 148 40'W
WYOMING Seamount
33 28'N - 56 57'W
WYVILLE-THOMSON Ridge
60 00'N - 7 15'W
XAGUA Bank :
See JAGUA Bank
XAUEN Bank
35 23'N - 4 18'W
XHOSA Seamount
46 50'S - 10 32'E
YAGHAN Basin
56 00'S - 61 30'W
YAKUTAT Valley
59 30'N - 140 00'W
YAMATO Basin
38 10'N - 135 00'E to 39 45'N - 138 00'E
YAMATO Bank
39 00'N - 134 00'E to 39 35'N - 135 55'E
* and GEBCO = Ridge, INT 511 = Tai or Bank
YAMATO Rise
39 00'N - 133 40'E to 40 30'N - 137 00'E
* Feature to be checked. Does not appear to be a "Rise"
YAMATO Seamount
38 53'N - 135 59'E
* (October 1986)
YAP Trench
8 30'N - 138 00'E
YAQUINA Trough
3 00'N - 80 00'W
YELCHO Canyon
66 40'S - 48 00'W
YERMAK Plateau
81 15'N - 5 00'E
YUCATAN Basin
20 00'N - 85 00'W
12-13-400-401-402
YUNASKA Canyon
53 15'N - 170 50'W
YUPANQUI Basin
20 00'S - 102 00'W
YURYAKU Seamount
32 45'N - 171 50'E
YVES ROCARD Seamount
17 39'S - 148 35'W
ZAMBEZI Canyon
20 00'S - 41 30'E
ZAPIOLA Ridge
45 00'S - 40 00'W to 45 00'S - 44 00'W
ZAPIOLA Seamount
38 10'S - 26 15'W
ZAVADOVSKI Canyon
65 30'S - 87 00'E
GEBCO = ZAVADOVSKY
ZEEWYK Knoll
22 50'S - 101 15'E
ZELEE Bank
12 30'S - 46 10'E
ZENKER Seamount
41 00'S - 6 00'W
* GEBCO = ADMIRAL ZENKER
ZENKEVICH Rise
* = 51 N - 161 E, GEBCO = ZENKEVICH Rise (See also HOKKAIDO Rise) INT Charts = HOKKAIDO Rise
ZEPHIR Shoal
15 52'S - 176 42'W
ZHEMCHUG Canyon
57 15'N - 175 45'W to 58 45'N - 175 15'W
ZHEMCHUG Spur
57 10'N - 176 00'W to 58 30'N - 175 15'W
ZINGU Seamount
38 45'N - 171 15'E
ZINMU Seamount
ZOROASTER Shoal
5 00'S - 56 40'E
ZUBOV Seamount
15 42'N - 160 00'E
ZULU Seamount
47 45'S - 10 00'E