Andrew,
Thanks for your kind replies. Great if you soon squash those pesky (but rare and relatively minor) bugs !
To continue discussion :
- Ship selection : I understand your point. In fact it's sometimes quite hard to select the wanted ship when there's many ships close together, grappled, etc..
I suggest that to handle this you add (optionnally) a "ship selector", something like a symbol/icon that would remain at all times over each (player) ship, with an automatic "go to foreground" of the selector that's under the mouse pointer whenever some selectors overlap.
Am I clear ? It's much more difficult to describe that it would be to draw it ...
- Ship handling : after rethinking on it, your solution looks fine...
- Pirates : ok too, but I've noticed during the battles that pirates were rather reluctant to board - though it should have been their sole way of success !
- Combat details : well, I'd have expected some formulas or tables to back up this "base rules" about what ammo is effective at some range ...
- Scenario editor : your suggestions are fine; if you know it I would suggest something resembling WS&IM (the boardgame) DIY scenario system, based on nation, period (limiting possible choice of ships), and a point system. I also think that a full free system should be proposed, with the player putting everything he wants where he wants. I'll post more later about this (some work to do...

).
Regards