Two ships of the Royal Norwegian Navy have borne the name HNoMS Otra, after the Norwegian river Otra:
- HNoMS Otra (1939) 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.
- HNoMS Otra (M351) is an Alta-class minesweeper still in service.
This article includes a list of ships with the same or similar names. If an internal link for a specific ship led you here, you may wish to change the link to point directly to the intended ship article, if one exists.