This is about Arma3 rangefinders in general, not only sniper/spotter ones.
- Remove constant ranging in favor of single "pings", commanded by player's input. "L" key could be useful here.
- There should be a timeout feature between the rangings, to simulate the need to cool down the laser emitter. Something between 5-7 seconds could be a good value, complete with onscreen countdown display ending with "RDY".
- It should be possible to detect working rangefinder, both for players and AI. Even nowadays, vehicles have laser warning systems and at least some rangefinders (as well as laser designators) can be seen with night vision and/or thermal imaging equipment, as a faint flash of light.
It would lead to important decisions to be made on the battlefield: can we risk detection, because of the rangefinder? Can we shoot and hit quickly enough, that the detection won't make a difference? Or maybe it would be better to obtain ranging information without using of rangefinder (map, MIL-crosshair, external source)?