HMS Tuna (N94) was a T-class submarine of the Royal Navy, launched on 10 May 1940 by Scotts Shipbuilding and Engineering Company in Greenock, Scotland. Powered by German-built MAN Diesel engines, Tuna was designed for wartime operations in European waters, including the North Sea and off the French coast. Her construction was part of the extension of the 1937 naval building program, with her engines delivered prior to the outbreak of World War II, although spare parts were scarce, prompting crew ingenuity for repairs at sea. Throughout her active service, Tuna played a significant role in various naval operations. Notably, she sank the Norwegian merchant ship Tirranna on 22 September 1940, a vessel captured by the German auxiliary cruiser Atlantis, resulting in the loss of 87 lives. Tuna also engaged and sank the German submarine U-644, and attacked others such as U-302 and the Italian submarine Brin, as well as several unidentified contacts. Her patrols included efforts to protect convoys near Trondheim in February 1942, although she did not engage the enemy directly during this period. A highlight of Tuna’s service was her participation in Operation Frankton in December 1942, under Lieutenant-Commander Dick Raikes. The submarine inserted twelve Royal Marines commandos into the Gironde estuary for a daring attack on Bordeaux harbor. Despite delays and challenges, the operation was successful, leading to the formation of the Special Boat Service and earning Raikes the Distinguished Service Order. Tuna’s combat record earned her numerous awards, including her commanding officer’s DSO with two bars, and medals for other crew members. She returned to home waters in November 1943 after four war patrols, having destroyed three U-boats. Post-war, Tuna attended British Navy Week in Rotterdam in August 1945. She was adopted by Aldershot during Warship Week and survived the war, being sold for scrap in December 1945, with dismantling completed at Briton Ferry in June 1946. Her service exemplifies the versatility and bravery of Royal Navy submarines during World War II.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.