https://www.usmilitariaforum.com/forums/index.php?/topic/289432-naval-air-squadrons-rotary-h-helicopter-squadrons/&do=findComment&comment=3104071
Naval Air Squadrons - Rotary 'H' Helicopter Squadrons - NAVY, COAST GUARD AND OTHER SEA SERVICES...
Here is a Helicopter Mine Sweeping Squadron patch from the 1980s.
air squadronscoast guardnavalrotaryh