Simple ideas to make the game more fun .

[THE_MASK]

What about 2 people manning the deck gun .
Right side of the deck gun has the sight and vertical traverse .
Left hand side has the sight and horizontal traverse .
2 people needed to man the deck gun .

[Chromatix]

Unfortunately that would leave only 2 crew for the entire rest of the boat, and would preclude gun actions while playing solo.

[Cpt-Maxim]

The current game allows two operators (but doesn't require two) to sit in gun position right now, just choose to operate different controls ahead of time.