Thinking of some ideas for a torpedo-heavy surface vessel.
Could submarine-like bow tubes be implemented, either above the waterline or below it on a surface vessel, firing forwards so as to not expose the broadside of the attacking vessel to the attacked?
Could multiple-tube torpedo banks be double-stacked, five wide and two high or similar, to allow a 2x5 bank in no greater space than a five-tube bank?
A little more extreme, thinking of some kind of revolver-like system holding 5 or so 18" torpedoes, with a power rammer to push torpedoes into tubes to give a torpedo boat or similar craft with fixed tubes the ability to rapidly fire and reload torpedo tubes?
Any of these at all possible?
What time period are you talking about?
Early torpedoes were slow so firing them forward would risk the torpedo ship running over their own torpedo's.
Later ones were faster but I don't know how fast they were when first fired.
Submarines are not fast so they can have a bank of torpedoes firing forward
PT boats are fast and they fired their torpedoes forward but to either side so that should work. Any surface ship firing torpedo's probably needs to be fast to avoid enemy fire.