Oh, I think it could be much simpler than that JapLance:
You just have to be careful when you choose to make a mark, but it is easy enough to get a new point, so long as you don't lose the sharpener in all the bouncing and shaking and water spraying... It would be nice if the XO could do the counting for you, but that sounds like something buried in the game code. Even it (the game) probably doesn't know how many it drops on you... I've seen where ships are supposedly limited to 40 cans apiece, and they're on top of your boat for hours, seemingly dropping 40 cans per hour, each...
