This is an odd one but I wonder if Arma 3 players can relate here, there is a function on an Arma 3 mod called ACE3 to "point" at a location, nearby people see a ring appear at the location pointed to.
like this:
http://www.armaholic.com/datas/users...er-v11-2_4.jpg
(it's a big pic so link only)
the idea is that an officer can use the key combo (on ACE3 it's ctrl+~) and it'll allow the line to see where he wants them to shoot, the kicker should be it could only affect people "in formation" #
perhaps senior sergeants with the ability too?
It's a little immersion breaking yes, but it's that old chestnut of "you can't point or gesture in a game" vs "why haven't I got dystentry yet?" life vs realism.
thanks
Pete