Were effective anti-submarine sloops basically coastal boats?
Short answerNo. Black Swan-class sloops and even wartime trawlers served beyond a coast-only role.
NotesEffective anti-submarine sloops were not basically coastal craft. The Black Swan class is the clearest counterexample, and even the trawlers do not fit a coast-only description. The exchange distinguishes ship type and operating role from a misleading shorthand about patrol area. This matters when comparing specialist escorts with corvettes and converted destroyers.