The perch starts wwii two engines down and doesn't keep them repaired long. During the opening of the war it suffers a series of mishaps (a circular running torpedo detonates close, loss of the comm gear, hole at the base of the sail, cracked and bowed shafts with only one engine providing propulsion. Scopes out, depth gauge out, numerous electrical grounds take sonar out, interior communications out-can't call for help., "Can't fight, can't run, - can't even dive. "