Index of Undersea features

O Bank, pad
Oates Bank, pad
Ob Banc, Bank, banka, pad, Shoal
Golfe de l' Ocean
Tongue of the Ocean
Oenarang Rock
Oga Basin, medence, selfmedence
Ogamuko Bank, pad
Oga-Muko Se
Ogotoruk Seavalley, selfvölgy, Valley
O-Guri
Ohotszki-self
Okhotsk Shelf
Oki hasadék, Trough
Okino Bank, pad
Okino-se
Okinoyama Bank, pad
Old Viking Bank
Olga Basin, selfmedence
Onyx Reef, sziklazátony
Banc Oost Hinder
Oreti Bank, pad
Ormsbee Bank, Reef, sziklazátony
Ormsby Bank, banka
Orphan Bank
Orphelin Banc, Bank, pad
otmel': see the other part of the name
Sea Otter selfvölgy, Strath, Valley
Outer Shoal
Outer Gorda Bank
Outer Silver Pit
Owen Basin, selfmedence
Oyster Reef, sziklazátony