The forward section starts at the bow with the peak tank. Next aft is the Underwater Sound Room and Rodmeter Compartment. The next space is hedgehog storage magazine. The next area is small arms storage magazine and ordnance stores with hatch to second platform. The next area is S. D. Stores. This is followed by diesel oil tanks and there is no access further aft through the engine and motor sections.

The middle section consists of the Forward Engine Room, Forward Motor Room, Aft Engine Room and Aft Motor Room. These are all accessed independently from hatches in the main deck passageway on the starboard side of the galley and muffler rooms. There are emergency exit hatches on the main deck on the port side. There is no interconnectivity between the engine and motor rooms.