Operating off Stavanger in September 1944, the boat's mines claimed two auxiliary submarine chasers and two merchant ships.

On 21 December, the boat's mines claimed three auxiliary submarine chasers, a German merchant ship, and a minesweeper.

Throughout the war, Rubis made 22 operational patrols, laying nearly 683 mines and sinking some 21,000 GRT of shipping.

With 22 ships sunk (14 of them German, including 12 warships), Rubis achieved the highest kill number in the FNFL.

The wreck lies 41 metres (135 ft) underwater between Cavalaire and Saint-Tropez, and has become a popular diving attraction.