The Uskok class was a class of two motor torpedo boats, Uskok and Četnik, built for the Royal Yugoslav Navy. Laid down on 15 September 1926 and launched in May 1927, they were lightly built using mahogany and powered by two petrol engines. Their main armament was two British-designed 456 mm (18 in) torpedoes. They were also fitted with hydrophones and could carry depth charges instead of torpedoes if used in an anti-submarine role. When the Axis invaded Yugoslavia in April 1941, Italian forces captured both boats. Commissioned in the Royal Italian Navy, the boats operated out of the Dalmatian port of Šibenik, their pre-war base. Their aged condition meant they were only used for patrolling and second-line duties. Uskok sank near the Dalmatian island of Mljet in July 1942 when its hull failed. Četnik was no longer fully operational by September 1943. Soon after Italy capitulated, its crew escaped and sailed it to Taranto in Allied-held southern Italy. Četnik survived the war but sources differ on its fate. (This article is part of a featured topic: Ships of the Royal Yugoslav Navy.)