In irons should be a slightly negative number, since the wind drags the boat backwards at that point. Plus it will force the player to tack back and forth, which is a fun part of sailing. I bet A.I. can tell you the angle the sail ought to render at too (unless non-moving sail was part of the cartoon aesthetic)

I did that simply for arcadeyness and feel but I’m not married to it at all

Giving the ship a slight constant forward moment felt nice and forgiving when testing, and user still has to tack back and forth to get meaningful enough speed to strafe a ship. But I’m definitely open to sliding the realism scale here