Six four-inch guns gave the Black Swans a substantial anti-aircraft battery, supplemented by close-range weapons whose fit varied. Depth-charge loads of roughly forty to 110 allowed repeated attacks with less risk of exhausting the ship's supply. Specialist capability did not protect the class from every threat: Italian torpedo bombers sank Ibis, while an acoustic homing torpedo damaged Woodpecker, which later sank under tow. Kite, Lark, and Lapwing illustrate the dangers of Arctic operations, including damage severe enough to end a ship's service without an immediate sinking. Service extended beyond the Royal Navy to the Royal Indian Navy, and Amethyst later became known for the 1949 incident.
Chapter · 8:22:41-8:25:32
Black Swan armament, endurance, and wartime losses
Heavy dual-purpose guns, abundant depth charges, and respected builders made the sloops formidable, but they still suffered losses to aircraft, torpedoes, and U-boats.