Timerover51
SOC-14 5K
I don't think "double occupancy staterooms" would describe 20th century naval accommodations. An enlisted bunk might be half the size of a low berth, including an allowance for the narrow walkway between the racks (3 high on each side in some cases). An officer's room would certainly be no more than 1 dton, and that would include about ¼ dton for it's share of the corridor.
Try 4 high for enlisted bunks, along with some “hot bunking”. Junior officers quarters would have 2 to 4 in occupancy, while CPO quarters would between 2 and 6. A lot of men would sleep on deck if the weather was good. Those ships were very crowded.