Vessels: O
From Islapedia
- Ocean King
- O. D.
- O'Hara (Santa Catalina Island shipwreck 1924)
- O.K. (Santa Cruz Island shipwreck 1923)
- Old Glory (Santa Catalina Island shipwreck 1915)
- Old Timer (Santa Catalina Island shipwreck 1966)
- Olita
- Olympia
- Olympia (cruiser) (Santa Catalina Island shipwreck 1931)
- On the Way
- Onward (Santa Catalina Island shipwreck 1950)
- Orca
- Orient
- Orient (another) (San Nicolas Island shipwreck 1969)
- Orizaba (pic)
- Osprey
- Otter (pic)
- OUKid
- Ozella (Santa Catalina Island shipwreck 1963)
