1. Add bags of tools or supplies to the metal storage boxes. Replacement gauges, a few pipe wrenches, rags?
2. Bring the gauges to life a bit with labeling.
3. Did only U.S. Subs (on some) install ice cream machines? On a UBoat.. maybe a keg or two?

4. Again with the cork insulation on exterior wall surfaces and asbestos coating of pipes?