DSV – Deep Submergence Vehicle
	DSV Trieste	1
	DSV-1 Trieste II	1			mod. DSV Trieste Class
	DSV-2 Alvin	1
	DSV-2 Alvin (mod.)	1			mod. DSV-2 Alvin Class
	DSV-3 Turtle	2
DSRV – Deep Submergence Rescue Vehicle
	DSRV-1 Avalon	2
NR – Nuclear Research Submarine
	NR-1	1
X – Midget Submarine
	X-1	1
	X-2	-