Many nations have depicted ships on stamps, since ships have long been a means of transporting the mail over long distances. Ships are also symbols of economic or military prowess, and in some cases specific ships are associated with events of historical significance to the issuing nation.
The protocol for listing ships is similar to that for people on stamps. If a specific ship is listed, it is by name, and others are by type and/or era. While this list could conceivably include any sort of watercraft, the emphasis is on large seagoing vessels.
Abu Dhabi 1964-1972
Aden 1937-1965
French Territory of the Afars and Issas 1967-1977
La Aguera none 1920-1922
Aitutaki 1903-1976
Ajman none 1964-1971
Alaouites none 1925-1930
Albania 1913-1969
Alexandretta none 1938
Algeria 1924-1969
Allenstein none 1920
Andorra none 1928-1990
Angola 1870-1990
Angra none 1892-1905
Anguilla 1967-1975
Anjouan none 1892-1912
Annam and Tonkin none 1888
Antigua 1862-1969
Argentina 1858-1970