- Aallotar (1936)
- Aallotar (1952)
- A-ROSA Bella (2002)
- A-ROSA Donna (2002)
- A-ROSA Silva (2012)
- Acapulco Jet (1989)
- Achernar (1993)
- Adler (1905)
- Adler III (1975)
- Adler V (1979)
- Adler XI (1967)
- Adler Baltica (1984)
- Adler Dania (1980)
- Aegir (1896)
- Aegna (1905)
- Aegna (1979)
- Aero 1 Highspeed (2022)
- Aero 2 Highspeed (2022)
- Aero 3 Highspeed (2022)
- Africa Mercy (1980)
- Airone Jet (1988)
- Akademik Nikolay Pilyugin (1999)
- Akrotiri Express (1955)
- Aksu (1952)
- Albin (1899)
- Alexandra (1969)
- Alexandra (1974)
- Aliantares (1990)
- Aliarturo (1991)
- Alielba (1972)
- Alieolo (1986)
- Aliflorida (1989)
- Aligea (1987)
- Alikenia (1989)
- Alisaturno (1972)
- Alivesuvio (1973)
- Amadeus (1969)
- Amélia de Mello (1956)
- Anna (1898)
- Anna Maria Laura (2000)
- Annarita Prima (1942)
- Annexet (1950)
- Annie Johnson (1969)
- Arcturus (1899)
- Ariadne (1914)
- Arnö (1916)
- Arv 1 (1979)
- Arvo (1899)
- Asinara I (1990)
- Aspö (1967)
- Astraea (1891)
- Astrea (1941)
- Aulanko (1952)
- Aurora Explorer (1999)