Yup one of the most frustrating choices for key commands ever.
Putting the fire torpedo right next to the most commonly used key in the game (time accellerate)... not a good idea.
Its the first thing I mod with a fresh install.
Ive probably wasted a dozen or so torpedos prior to changing it to ctrl+enter
Oh and wanted to add another pet peve of mine the 'surface' key S and the 'dive' key D being right next to each other, has gotten me killed during a couple of late night sessions after a few adult beverages.
"Surface the boat" (presses d)...soon the crew is crying out and taking damage... oops better suface NOW... press d again.... POP !