Two ships of the
Royal Norwegian Navy have borne the name HNoMS ''Otra'', after the Norwegian river
Otra:
* was an ''Otra''-class
minesweeper launched in 1939 and captured by the Germans in 1940. Reverting to Norwegian service after the German capitulation in 1945, ''Otra'' was finally decommissioned in 1959, and scrapped in 1963.
* is an still in service.
{{DEFAULTSORT:Otra
Royal Norwegian Navy ship names