While stationed in Key West , FL. the WWII sub I was on at that time ran operations with the UDT teams in training. We would go out at night, surface(miles off shore), place rafts and men(no motors) on the aft deck, and then submerge. As I remember these guys carried an assortment of firearms. I saw grease guns, Thompsons, 1911s, revolvers, sawed off pump shotguns, but most all there arms were small and compact! No 686s, they weren't invented yet!
jcelect SWCA#723