Editing Black Swan-class sloop (section)

==History==
Like [[corvette]]s, sloops of that period were specialised [[convoy]]-defence vessels. Corvettes were based on a mercantile design with triple expansion engines, sloops were conventional naval vessels with turbines.  Sloops were larger and faster with a heavy armament of high angle 4-inch guns which had superior [[anti-aircraft warfare|anti-aircraft]] fire control via the [[Fuze Keeping Clock]], while retaining excellent [[anti-submarine warfare|anti-submarine]] capability. They were designed to have a longer range than a [[destroyer]] at the expense of a lower top speed, while remaining capable of outrunning surfaced [[German Type VII submarine|Type VII]] and [[German Type IX submarine|Type IX]] [[U-boat]]s.

In [[World War II]], ''Black Swan''-class sloops sank 29 U-boats. The most famous sloop commander was Captain [[Frederic John Walker]]. His sloop {{HMS|Starling|U66|2}} became one of the most successful submarine hunters, taking part in the sinking of eleven U-boats. After the war, sloops continued in service with the Royal Navy, [[Egyptian Navy]], [[Indian Navy]], [[Pakistan Navy]] and the [[German Navy|West German Navy]]. In April 1949, {{HMS|Amethyst|U16|2}} was attacked on the [[Yangtze River]] by the Communist [[People's Liberation Army]]. Several ''Black Swan'' sloops fought in the [[Korean War]].