I was wondering whether the weapons mount would have different set of range and limited firezone, so that you can do something like crossing the t and broadside and stuff.
And a bug: the hovercraft is smaller than it looks, even the model have made contact with some objects like a tree would not affect them -- then just go right through the model. and it cannot crush, fence or tree or anything, which might be rather inconvinent.

Limited firezone is not possible for turreted weapons. They can either be fixe 0° or 360°, no exceptions. Only if the weapon isnt turreted (or not visible and said to be turreted), it can be set to have limited firezone. It can be done with turreted too, but you will see how the turret ad gun faces forward, but projectiles flies in completely weird angle, even through the barrel. This is SAGE engine limitation, which cannot be overcome, if I am not mistaken.

Also, if you are thinking of weapons that may be pointing into your broadsides (3 and 9 hour), and from here have some limited firezone, its also not possible. Again engine limitation.