This idea is very similar to a game called 'guns of icarus', in this game 4 people work together to control and repair the ship and also shoot others, i am suggesting a game mode that lets you do this, for example - One captain, One/Two cannoneers (one for each side of the ship) and another to repair. This would look great in a first person view and also encourage team work even further - which i am a big fan of. There could be custom maps for this game mode.
This would make the game even more immerseive than it already is and create a greater sense of realism, i would love to see this idea come to life and i hope others share the same opinion as i do.