day and sustain damage. 21 December 1944, off Norway: German cargo ship (formerly Latvian Gundega), 3,654 BRT, hits a mine laid on 19 December and sinks German auxiliary submarine hunter UJ 1113 / KUJ 7, 970 BRT, hits a mine laid on 19 December and sinks German auxiliary submarine hunter UJ 1116 / KUJ 11, 970 BRT, hits a mine laid on 19 December and sinks German auxiliary submarine hunter UJ 1702 / KUJ 16, 970 BRT, hits a mine laid on 19 December and sinks German minesweeper R 402, 140 t, hits a mine laid on 19 December and sinks See also List of submarines of France References External links FS Rubis, uboat.net Les bâtiments ayant porté le nom de Rubis File on Rubis on the Ordre de la Libération website Wreck of Rubis Panorama of the wreck of Rubis Saphir-class submarines (1928) Ships built in France 1931 ships World War II submarines of France Submarines of the Free French Naval Forces Companions of the Liberation