After WWII, deck “guns” were removed from submarines but the small arms compliment remained, usually including a MK II for awhile. However when the large gun left, so did the Gunner’s Mate. (GMs were assigned to subs in WWII to handle the deck guns.) Naturally someone had to fill the void and the job fell to TM’s. Selected TMs went to various schools, out-numbered but never out-gunned by GMs, to learn SA mainitenance, ammunition administration and crew training. I have always felt honored and lucky to have been one of those.
BTW, I recall referring to a 5" gun once as a “cannon” and an old, crusty GMC climbed me like a bear climbing a tree! “It’s a Naval Gun you *** **** bubblehead! We ain’t used cannons since sails went away!” I sort of accepted that term to heart and have since referred to large caliber guns upon ships as Naval Guns. Based on that, I have always felt that if you loaded it from the muzzle, and it was to big to carry in your hands, it was a cannon. If it had wheels and loaded from the breech, it was artillary and if it was on a mobile platform, it was a gun.(a BIG one)
My toes are just fine Ray. Just couldn’t pass up the shot.