Auxiliary Machinery Space #1 
Artist's Notes: The first sketch is of the starboard side of Air Regen looking forward, showing the O2 generator, 400Hz gens for Nav and Sonar, etc. The second sketch is of the port side of Air Regen looking forward from almost the same vantage point, showing the air compressors, R12 plant, tank accesses, etc. These drawings gives a good idea what it *really* looks like inside a submarine! Both were drawn sitting on the steps leading into the reactor tunnel. I remember it took several days to complete both, and how many times I had to get up and down as someone came through the tunnel going forward or aft.