| Ship Name | Hull No. | IMO No. | ENI No. | Year Built | Date Taken | Location |
|---|---|---|---|---|---|---|
| Maud | 9247728 | 2003 | 2024-05-13 | Stromness | ||
| USS Mauna Kea | AE22 | 1957 | 1988-11-06 | San Francisco | ||
| rv Maureen | 1975 | 2013-12-28 | River Tyne | |||
| rv Maureen | 1975 | 2014-12-29 | River Tyne | |||
| Maurice | 1944 | 2010-06-21 | Rotterdam | |||
| Maurice | 1944 | 2012-06-25 | Rotterdam | |||
| RNLB Maurice and Joyce Hardy | 14-18 | 1996 | 1997-09-28 | Fowey | ||
| USNS Maury | T-AGS 66 | 9633484 | 2016 | 2023-06-29 | Belfast | |
| Mauve | PM29 | 1984 | 2008-08-10 | Marseille | ||
| Maveric | 9043055 | 1993 | 1999-01-24 | Southampton | ||
| Maverick Genesis | 9457464 | 2010 | 2011-06-28 | Rotterdam | ||
| RNLB Max Aitken III | 47-018 | 1987 | 2011-08-06 | Southampton | ||
| Max Brauer | 7904566 | 1980 | 1995-08-21 | Hamburg | ||
| Max Brauer | 7904566 | 1980 | 1998-05-27 | Hamburg | ||
| Max Waldeck | 6705949 | 1966 | 1997-06-08 | Rendsburg | ||
| Maximus | 1956 | 1995-10-06 | Ipswich | |||
| sb May | 1891 | 2001-08-28 | Portsmouth Harbour | |||
| sb May | 1891 | 2008-05-18 | River Thames | |||
| May Princess | 1991 | 2012-04-18 | Anstruther | |||
| pv Mayflower | 2022 | 2023-07-07 | Portsmouth Harbour | |||
| pv Mayflower | 2022 | 2024-04-19 | Portsmouth Harbour | |||
| Mayflower Garden | 1974 | 2005-07-17 | River Thames | |||
| Mayflower Garden | 1974 | 2006-05-01 | River Thames | |||
| Mayflower Garden | 1974 | 2009-06-11 | River Thames | |||
| Mayflower Garden | 1974 | 2009-06-14 | River Thames | |||
| Mayflower Garden | 1974 | 2023-07-06 | River Thames | |||
| fv Mayfly | LI111 | 1985 | 2012-07-21 | Portsmouth Harbour | ||
| Mazarine | 9376696 | 2009 | 2010-06-20 | Rotterdam | ||
| Mazzel | 1943 | 2011-06-27 | Rotterdam | |||
| MB Humber | 1991 | 1992-09-27 | Rotterdam | |||
| MCA Harrier | 2002 | 2012-04-08 | Portree | |||
| MCA Hawk | 2002 | 2014-08-07 | Firth of Clyde | |||
| USS Mckee | AS41 | 1981 | 1994-09-16 | San Diego | ||
| MCL Fortune | 9056038 | 1993 | 2002-06-19 | Vlissingen | ||
| MCS Kaver | 9694165 | 2013 | 2017-08-27 | Blyth | ||
| MCS Kaver | 9694165 | 2013 | 2017-09-16 | Blyth | ||
| MCS Marlene | 9252084 | 2001 | 2003-06-14 | River Mersey | ||
| MCS Nikky | 8891041 | 1994 | 1997-07-13 | Southampton | ||
| MCS Swath 1 | 9808962 | 2016 | 2024-09-12 | Peterhead | ||
| MCS Zephyr | 2011 | 2014-05-31 | River Mersey | |||
| MCT Almak | 9173109 | 1999 | 2011-06-29 | River Humber | ||
| Meander | 9032458 | 1992 | 2002-08-11 | Goole | ||
| Med Adriatic | 9410662 | 2013 | 2015-08-31 | River Mersey | ||
| Med Adriatic | 9410662 | 2013 | 2015-08-31 | River Mersey | ||
| Med Antarctic | 9462316 | 2017 | 2023-07-08 | Southampton | ||
| Med Arctic | 9410545 | 2009 | 2011-06-26 | Rotterdam | ||
| Med Sky | 1987 | 1996-04-14 | Rotterdam | |||
| Medea | 8016550 | 1982 | 2000-06-05 | Southampton | ||
| Medferry Express | 7705714 | 1978 | 1998-04-28 | Southampton | ||
| Medi Venezia | 9302774 | 2005 | 2012-06-22 | Rotterdam | ||
| Medi Venezia | 9302774 | 2005 | 2012-06-24 | Rotterdam | ||
| Medina River | 6927573 | 1969 | 1992-08-16 | Newport, IOW | ||
| Méditerranée | 8705395 | 1989 | 2008-08-10 | Marseille | ||
| HMSDL Medusa | ML1387 | 1943 | 1989-03-27 | Portsmouth Harbour | ||
| HMSDL Medusa | ML1387 | 1943 | 2002-04-20 | Southampton | ||
| HMSDL Medusa | ML1387 | 1943 | 2010-08-15 | Portsmouth Harbour | ||
| Medway | 1977 | 1997-04-18 | Dunkerque | |||
| Medway Ranger | 1991 | 2006-05-06 | River Medway | |||
| rv Medway Surveyor | 1963 | 2010-05-22 | River Medway | |||
| Meeching | 5230686 | 1960 | 2001-09-01 | River Thames | ||
| Meera | 9368041 | 2009 | 2011-06-27 | Rotterdam | ||
| Meermin | 8433966 | 1983 | 2002-06-19 | Vlissingen | ||
| Mega Brook | 7405675 | 1977 | 1996-05-05 | Falmouth | ||
| Mega S | 7433672 | 1988 | 2001-05-29 | Hamburg | ||
| Megan M | 6515473 | 1965 | 2023-03-23 | Firth of Clyde | ||
| Mein Schiff 3 | 9641730 | 2014 | 2019-08-25 | River Tyne | ||
| Mein Schiff 3 | 9641730 | 2014 | 2023-07-08 | Portsmouth Harbour | ||
| Mein Schiff 3 | 9641730 | 2014 | 2024-05-12 | Cromarty Firth | ||
| Mein Schiff 3 | 9641730 | 2014 | 2024-07-15 | Southampton | ||
| Mein Schiff 3 | 9641730 | 2014 | 2025-09-08 | Firth of Clyde | ||
| Mein Schiff 5 | 9753193 | 2016 | 2019-08-02 | River Mersey | ||
| Meiyo Maru | 8020202 | 1981 | 1998-02-06 | Southampton | ||
| Mekhanik Cherevko | 1999 | 2000-01-18 | Southampton | |||
| Melar | 2008-05-04 | Haugesund | ||||
| Melas | 9409625 | 2010 | 2015-08-31 | River Mersey | ||
| Melissa | 1977 | 1992-09-27 | Rotterdam | |||
| Melton | 1996 | 1998-05-26 | Felixstowe | |||
| pv Melwey | 1989 | 1995-04-15 | Weymouth | |||
| Memel | 1967 | 1997-06-08 | Rendsburg | |||
| pv Menkar | 7605689 | 1977 | 2002-06-21 | Vlissingen | ||
| Merano | 1949 | 2006-08-10 | River Thames | |||
| Mercator | 7047356 | 1971 | 1990-04-13 | St. Helier | ||
| Mercedes | 5156658 | 1958 | 2005-07-03 | Portsmouth Harbour | ||
| Mercedes | 1960 | 1997-07-19 | River Thames | |||
| Mercedes | 1960 | 2009-06-14 | River Thames | |||
| Merchant Bravery | 7724253 | 1978 | 2006-06-16 | Dublin | ||
| Merchant Victor | 7800112 | 1978 | 1996-04-15 | Felixstowe | ||
| Merchantman | 9433523 | 2008 | 2023-06-29 | Belfast | ||
| Mercia | 1984 | 2002-04-22 | River Thames | |||
| Mercia | 1984 | 2005-07-16 | River Thames | |||
| Mercia | 1984 | 2006-08-06 | River Thames | |||
| Mercia | 1984 | 2008-05-18 | River Thames | |||
| Mercuria | 2006 | 2008-05-18 | River Thames | |||
| Mercuria | 2006 | 2009-06-11 | River Thames | |||
| Mercurius | 02322887 | 1953 | 2002-06-17 | Rotterdam | ||
| cs Mercury | 5232555 | 1962 | 1989-07-08 | Southampton | ||
| Mercury | 9106302 | 1997 | 1997-10-17 | Southampton | ||
| Mercury Clipper | 9820128 | 2017 | 2023-07-06 | River Thames | ||
| Mercuur | 1936 | 2011-06-26 | Rotterdam | |||
| Mercuur | 8432974 | 1956 | 2011-06-27 | Rotterdam |