[2] For surface running, the boats were powered by two 950-brake-horsepower (708 kW) diesel engines, each driving one propeller shaft.

[5] Sibyl had a distinguished career, sinking numerous enemy ships, including the Italian merchant Pegli, the French (in German service) merchant St. Nazaire, the German auxiliary minesweeper M 7022/Hummer, five Greek sailing vessels and an unknown sailing vessel.

On being transferred to operate in the Pacific in early 1945, Sibyl continued to cause losses to enemy shipping.

After the atom bombs were dropped on Japan, Louis Mountbatten, Supreme Commander in the Far East wanted the surrender signed in Singapore and called for the fleet to be there.

It was noted that the entire harbour smelt of freshly baked bread for several days as the numerous ship's galleys were put to the task of feeding the starving prisoners of war.

[7] Sibyl survived the Second World War, and was sold off, arriving at Troon in March 1948 for breaking up.