Two articles from our FOM make it quite easy to stay up front, close to the cockpit, unless you want to immediatly fall illegal in an emergency. Simply because the skipper would NOT be able to comply in the torpedo tube:
The following are occasions on which the Captain is required to assume the
duties of PF irrespective of prior allocations:
During a rejected takeoff.
During certain emergency or abnormal procedures.
[the Captain has to ensure ]... that in an emergency situation that requires immediate decision and action, the Commander or the pilot to whom conduct of the flight has been delegated may deviate from rules, operational procedures and methods to take any action he considers necessary under the circumstances in the interest of safety
Interpretation is up to the individual skipper, to me though it is crystal clear: In an emergency in the torpedo tube we are illegal and would be held accountable.