My stepson is a fire fighter at the Point Loma sub base in SD and part of his training is learning how to navigate around a ship during a fire/smoke situation using nothing but reference points and bulkhead markings. He has remarked that while it’s cramped - especially when carrying 70+ lbs of rescue breathing gear, it’s an incredible labyrinth of rooms and compartments inside.
A fire on a submarine is probably the worst possible situation imaginable. Because of the design for ventilation most of the decks are not actually attached to the sides which provides a ready path for flames and smoke to quickly permeate thru the entire ship. Suffice to say that quick fire suppression by the crew is critical otherwise the entire ship is at grave risk.
