Late to this game so apologies for digging up this older thread.
I’ve not played a game yet (models in the post) so not sure of the impact my thought might have – for the bow/stern aspect, using Leopard’s 30 degree arc, I would consider declaring the target size being one smaller than normal.
How this would impact the ‘to-hit’ mechanic I’ve yet to work out; not even having read the rules !!!