The shooter fires the shot while the spotter assists in observation of targets, atmospheric conditions and handles ancillary tasks as immediate security of their location, communication with other parties; including directing artillery fire and close air support. A flanker's task is to observe areas not immediately visible to the sniper or spotter and assist with the team's perimeter and rear security, therefore flankers are usually armed with an assault rifle or battle rifle. Both spotter and flanker carry additional ammunition and associated equipment.