| Ship Name | Hull No. | IMO No. | ENI No. | Year Built | Date Taken | Location |
|---|---|---|---|---|---|---|
| Oak | 8029636 | 1981 | 1996-05-05 | River Fal | ||
| Oakgarth | 1984 | 2000-08-04 | River Mersey | |||
| RFA Oakleaf | A111 | 7915814 | 1981 | 1987-12-05 | Portsmouth Harbour | |
| Oarsman | 1980 | 2001-07-07 | River Mersey | |||
| Oasis | 2008-05-18 | River Thames | ||||
| Oasis | 1967 | 2023-07-06 | River Thames | |||
| RMAS Oban | A283 | 9201580 | 2000 | 2000-06-07 | Poole | |
| Obbola | 9087350 | 1996 | 2001-05-12 | River Thames | ||
| Obbola | 9087350 | 1996 | 2011-06-26 | Rotterdam | ||
| HMS Oberon | S09 | 1961 | 1984-08-25 | Portsmouth Harbour | ||
| Oberspritzenmeister Repsold | 1980 | 1995-08-23 | Hamburg | |||
| Oberspritzenmeister Repsold | 1980 | 1997-06-09 | Hamburg | |||
| Ocala | 9032068 | 1994 | 2010-05-23 | River Thames | ||
| fv Oceaan VII | SCH333 | 8519071 | 1986 | 2002-06-16 | Ijmuiden | |
| Ocean Ace | 8300418 | 1983 | 1999-04-09 | Southampton | ||
| Ocean Atlantic | 8325432 | 1986 | 2015-05-18 | Lerwick | ||
| Ocean Atlantic | 8325432 | 1986 | 2015-05-20 | Lerwick | ||
| Ocean Atlantic | 8325432 | 1986 | 2019-05-29 | Aberdeen | ||
| Ocean Beauty | 8025850 | 1982 | 2010-06-20 | Rotterdam | ||
| Ocean Breeze I | 1980 | 1996-04-14 | Rotterdam | |||
| Ocean Clever | 7402477 | 1975 | 2015-05-22 | Aberdeen | ||
| Ocean Cobalt | 9439137 | 2008 | 2010-06-20 | Rotterdam | ||
| Ocean Cobalt | 9439137 | 2008 | 2010-06-21 | Rotterdam | ||
| Ocean Dragon | 9576662 | 2009 | 2014-05-31 | River Mersey | ||
| Ocean Earth | 7112448 | 1971 | 1989-08-23 | Lorient | ||
| Ocean Falcon | 9698915 | 2015 | 2015-05-17 | Aberdeen | ||
| Ocean Geograph | 9267388 | 2007 | 2022-05-13 | Aberdeen | ||
| Ocean Glory | 1935 | 1989-09-24 | Portsmouth Harbour | |||
| Ocean Guardian | 8025989 | 1985 | 2012-04-14 | Cromarty Firth | ||
| fv Ocean Harvest | PD198 | 2008 | 2011-04-28 | Peterhead | ||
| fv Ocean Harvest III | FR145 | 1988 | 2012-04-15 | Fraserburgh | ||
| fv Ocean Herald III | KY97 | 1968 | 2010-08-08 | River Tyne | ||
| Ocean Hope II | 9108594 | 1995 | 2002-06-20 | Antwerp | ||
| fv Ocean Hunter | SY503 | 1969 | 2012-04-08 | Mallaig | ||
| Ocean Interceptor | 2019-05-30 | Aberdeen | ||||
| Ocean Irene | 8408703 | 1986 | 2002-06-18 | Rotterdam | ||
| Ocean Kmir | 7638727 | 1977 | 1999-09-14 | Southampton | ||
| fv Ocean Maid | BA55 | 1974 | 2010-08-10 | River Tyne | ||
| Ocean Majesty | 6602898 | 1966 | 2002-08-15 | Dublin | ||
| Ocean Mist | 1919 | 2010-03-20 | Leith | |||
| Ocean Ness | 9224829 | 2001 | 2014-10-12 | Aberdeen | ||
| Ocean Nova | 8913916 | 1992 | 2014-05-09 | Stornoway | ||
| Ocean Nova | 8913916 | 1992 | 2019-05-30 | Aberdeen | ||
| rv Ocean Observer | 8511275 | 1987 | 2011-04-29 | Aberdeen | ||
| Ocean Osprey | 9666962 | 2014 | 2015-05-23 | Aberdeen | ||
| rv Ocean Pearl | 9125140 | 1997 | 2015-07-03 | Leith | ||
| Ocean Predator | 2010 | 2013-09-12 | Aberdeen | |||
| Ocean Pride | 1974 | 1997-04-19 | Antwerp | |||
| fv Ocean Reaper IV | FR273 | 1999 | 2012-04-15 | Fraserburgh | ||
| rv Ocean Reliance | 8616609 | 1987 | 2013-09-12 | Montrose | ||
| rv Ocean Reliance | 8616609 | 1987 | 2013-09-16 | Montrose | ||
| rv Ocean Reliance | 8616609 | 1987 | 2022-05-22 | Aberdeen | ||
| rv Ocean Researcher | 8207941 | 1984 | 2012-09-13 | Montrose | ||
| rv Ocean Researcher | 8207941 | 1984 | 2013-09-16 | Montrose | ||
| fv Ocean Reward IV | BCK83 | 1997 | 2011-04-28 | Peterhead | ||
| fv Ocean Rover | SN2 | 1980 | 2015-08-20 | River Tyne | ||
| fv Ocean Rover | SN2 | 1980 | 2016-12-27 | River Tyne | ||
| Ocean Scene | 8633865 | 1994 | 1998-04-28 | Southampton | ||
| Ocean Searcher | 7401306 | 1975 | 2012-09-15 | Aberdeen | ||
| Ocean Searcher | 7401306 | 1975 | 2014-06-10 | Aberdeen | ||
| Ocean Searcher | 7401306 | 1975 | 2014-06-14 | Aberdeen | ||
| rv Ocean Seeker | 7012179 | 1970 | 2013-05-13 | Aberdeen | ||
| rv Ocean Seeker | 7012179 | 1970 | 2013-05-15 | Aberdeen | ||
| Ocean Shanghai | 9304576 | 2006 | 2013-01-01 | River Tyne | ||
| Ocean Spartan | 2019-05-27 | Aberdeen | ||||
| Ocean Spey | 9224817 | 2000 | 2013-05-10 | Lerwick | ||
| Ocean Spirit | 8321747 | 1985 | 2000-06-09 | Southampton | ||
| Ocean Spirit of Moray | 1995 | 2014-08-06 | Firth of Clyde | |||
| Ocean Splendor | 9622825 | 2013 | 2014-08-23 | River Tyne | ||
| Ocean Sprite | 7402544 | 1975 | 2014-06-08 | Aberdeen | ||
| Ocean Sprite | 7402544 | 1975 | 2014-06-09 | Aberdeen | ||
| Ocean Star | 8103183 | 1982 | 2005-07-17 | River Thames | ||
| Ocean Surf | 9165906 | 1998 | 2012-09-15 | Aberdeen | ||
| Ocean Swan | 8201519 | 1983 | 2014-05-04 | Aberdeen | ||
| Ocean Swift | 5288396 | 1957 | 2012-09-15 | Aberdeen | ||
| Ocean Swift | 5288396 | 1957 | 2014-06-09 | Aberdeen | ||
| Ocean Troll | 8316900 | 1984 | 2014-06-14 | Aberdeen | ||
| fv Ocean Venture II | PD340 | 1992 | 2012-04-15 | Peterhead | ||
| fv Ocean Venture II | PD340 | 1992 | 2014-05-05 | Peterhead | ||
| Ocean Victory | 1972 | 1996-05-05 | River Fal | |||
| rv Ocean Victory | 7121140 | 1972 | 2015-10-16 | Firth of Clyde | ||
| Ocean Viking | 2019-05-27 | Aberdeen | ||||
| fv Ocean Way | FR349 | 1974 | 2011-04-28 | Fraserburgh | ||
| fv Ocean Way | FR349 | 1974 | 2012-04-15 | Fraserburgh | ||
| fv Ocean Way | BF878 | 1987 | 2011-04-28 | Fraserburgh | ||
| fv Ocean Way | BF878 | 1987 | 2012-04-15 | Fraserburgh | ||
| fv Ocean Way | BF878 | 1987 | 2013-05-06 | Macduff | ||
| fv Ocean Way | LK207 | 1996 | 2013-05-10 | Lerwick | ||
| rv Ocean Wind 3 | 2008 | 2010-05-22 | River Thames | |||
| Ocean Wind 8 | 9770490 | 2015 | 2016-12-27 | Blyth | ||
| Oceana | 9169550 | 2000 | 2003-05-03 | Southampton | ||
| Oceana | 9169550 | 2000 | 2006-04-21 | Southampton | ||
| Oceana | 9169550 | 2000 | 2011-08-06 | Southampton | ||
| fv Oceana | BF840 | 2000 | 2015-06-08 | Troon | ||
| Oceanic Enterprise | 9086978 | 1995 | 1999-07-19 | River Mersey | ||
| HMS Ocelot | S17 | 1964 | 2002-06-04 | River Medway | ||
| rv Octans | 7013898 | 1969 | 1996-04-15 | Rotterdam | ||
| Odda | 8112641 | 1982 | 2005-05-12 | Haugesund | ||
| Oderstern | 1992 | 2001-08-18 | Manchester Ship Canal | |||
| Odin | 1964 | 2003-06-14 | River Mersey |