So the choice is an LP blow or EMBT blow? I never knew that. Strange that is a system that would be removed from the mix, although I guess I could count on one hand the number of times any 637-class I was on surfaced using a HP blow.
Yes - We drove the boat up on the ME's, kept it above water with the boat's angle riding the vents until the LP blower got the air out of the tanks, then "opened the hatch" and sent the OOD and lookouts topside.
Yeah, I always felt better having those two Marotta valves there on top of the Christmas Tree myself.