Consecutive fire on the same target accumulates splash markers that improve accuracy.
How it works
After shooting, the firer places one of its two splash markers in the target's space, and the second on a subsequent turn's shot at the same ship; each gives -1 to the shooting number. Markers move with the target ship and are all removed if the firer switches targets.
After shooting, place one of your Splash Markers in the enemy space. Place your second Splash Marker when you fire at the ship on a subsequent turn. (All Splash Markers are removed when you shoot at a different ship.)