Ezekiel's Wheel: The Escher of Habitats
I described the type of centrifuge habitat used by the River-class transports as being a species of Winchell Chung's Ezekiel's Wheel. I also described it as a maintenance nightmare, as anything that must hold pressure and spin is already a nightmare, and anything that spins on two axes is a nightmare squared.
Submarines in SPAAACE-ships!?