The compartment in the narrow part of the stern aft of the aft peak bulkhead.
Forepeak Tank - an overview
APT - Aft Peak Tank
Titanic's Hidden Deck
Titanic's Hidden Deck
Aft End Arrangement: by Group 1, PDF, Stern
Peak Tank - an overview
04-Aship LBP is 152 m , floating at draughts Fd;4.60m
Titanic's Hidden Deck
Aft Peak Tank
File:Libertyship linedrawing en.jpg - Wikipedia