When cargo pump-room and compressor rooms are permitted
to be fitted at the after end of the aftermost hold space the bulkhead
which separates the cargo pump-rooms and compressor rooms from accommodation
and service spaces, control stations and machinery spaces of category
A should be so located as to avoid the entry of gas to these spaces
through a single failure of a deck or bulkhead. The same conditions
should also be satisfied when cargo pump-rooms and compressor rooms
fitted within the cargo area, have a bulkhead in common with accommodation
and service spaces, control stations and machinery spaces of category
A.