I've literally phoned in intel before lol
Snipers are ALL ABOUT recon and intel, that's pretty well their primary function lol
Marksmen go around shooting people, I'm a marksman with my BA rifle. I go sneak around stealthily and shoot people. That's pretty well all I do. I generally don't even carry a radio with me when I have my BA rifle, but I don't usually take it to ops either.
We had a pair of EXCELLENT snipers in Winnipeg, but they since stopped playing. They'd have their own comms channel on top of platoon comms. They'd sneak up and do recon on targets, set up traps for the enemy, distract them for our assault force, and very effectively relay information and take out squads.
So not only were they excellent at working together to kill people, but they also helped OTHER PEOPLE in accomplishing objectives.