The premise of the mod is to take the factional warfare aspect of Stalker: Clear Sky and make it the entire focus of the game, rather than a neglected feature.
You can radio in squads with a nice variety of options. It's even posible to micro manage each squad! Doing so may prove to be counterproductive: the zone is full of traps and Death waits around the corner. Not every squad is going to make it to their destination...
How do you get these options?
Click on the "Menu" option and select "Squads".