You are an 18-year retired vet of the Navy and you don't know the answer to these questions?
I'm very dissappointed in the US Navy training.
Dunno if it's different today, but I went through USN reserve boot camp and never handled a pistol. Once on active duty, I stood many a watch with loaded .45, never having recieved a bit of training in it's use. On one boring midwatch, I disassembled the .45 and it took almost the entire rest of the watch to get it back together ;-}
Hope things have improved since those days
"You are an 18-year retired vet of the Navy and you don't know the answer to these questions"?
The Navy doesn't give much in the way of firearms training beyond bootcamp anymore. That is, unless your rate includes firearms handling (such as Gunner's Mate or if you are in SeaBees). If you're lucky enough to get into the SEALs, you get advanced weapons training. I know that this was the case as recently as the early 80's, and probably still is.
And there are sources on the web that claim pistols and revolvers are different.
This site defines pistols as single-chambered and revolvers as multi-chambered.
The most common definition, however, is that a pistol is any firearm designed to be fired with one hand, and that revolvers are pistols.