Help with Firing Arcs

[Xenoche]

Hi, I am making a map like the game "Sid Mires Pirates", where the cannons can only fire if an enemy is to the left and right of your ship. Ive tryed using triggers by im not quite competent enough to do so .
If any1 knows, or has some ideas it would be greatly apreiciated as it is a major strategic point in my ship combat system.

 

[Myzteryz]

under object editor, change the range of the "cannons" to low enough so they can't atk on the opposite side