The cramped maintenance spaces behind marine boilers

Which warship access spaces most suggest that designers hated the maintainers?

The narrow spaces between boilers and bulkheads still need access for cleaning where pipes emerge, and destroyers make the problem especially severe.

The tight passages behind marine boilers carry piping toward turbines and other machinery. These spaces still require periodic cleaning and inspection despite offering very little room to move, and the limited beam of a destroyer makes the access problem particularly unforgiving.