Using TAG with Artillery - MegaMek/megamek GitHub Wiki
In the artillery phase, shoot the Arrow IV Homing Missile or Copperhead round (Thumper/Sniper/Long Tom).
Wait until it lands (at least one turn unless the artillery is on board and the destination is 17 hexes or shorter).
Fire TAG at the target the turn the artillery lands.
If the TAG hits and:
- you have only one valid TAG hit in the area, all the homing/copperhead will try to attack that target.
- you have more than one valid TAG hit, you may choose which one to attack.