Easy.
Lets take the good ol' Stormtroopers from the Imperial Guard.
Okay, you have 10 stormtroopers and there are 20 orks a bit aways but you dont know if they are in range or not. You think they are but you just arent sure.
Then you use your targeters to measure the range.
Whoops, they are 26" inches away...
Luckily there are 10 grots that are within 16"
Since the targeters measure the range you get to fire at the grots rather then forfeiting your turn because you chose to shoot at the orks which were out of range.
It basicly lets you check range for free |