Through another watertight door was the forward engine room.
Both engine rooms were nearly identical with two diesel engines
occupying much of the space. A walking deck ran down the
center of the room and a watertight bulkhead separated the
forward and after engine rooms.
Both compartments contained two diesel main
engines. Each of the engines
were directly coupled to a high-powered electrical generator. Output from the engine-driven generators provided electrical
power to operate the electrical propulsion motors in the motor room when
the boat was operating on the surface.
While on the surface, the generators charged the batteries.
In the aft engine room, below deck level was a small auxiliary diesel engine (“dinky”).
It performed as a low power substitute for any main engine.
The forward engine room duplicated the aft engine room, except
that the forward had a small machine shop in place of the “dinky”.