Often, when on a gun it is impossible to tell the direction your ship is moving or turning. This makes it extremely difficult to factor ship movement into aiming. If I were a gunner on a ship, and I had this problem, the first thing I would do is place a small flag (or even a bit of yarn on a stick) in my field of view. This would give me at least a basic idea of the direction wind was moving over my gun, and thus how to adjust my aim.
Given that I have seen tiny flags flying off ropes all over ships, it doesn't seem that something like this would be hard to add in. Does anyone else think that this is a good idea?
