Do not scan using someone else ' s drone or camera . When you scan an enemy the cameras light up bright red , it tells the player you just scanned they have been spotted , and it only briefly marks them . Only use scans sparingly if you really have to give people an idea where they are like for a through the wall shot . If you scan you should have a reason . When you scan someone they are going to stop dead , reposition , and take out your camera . Use voice chat to descript where they are . Pay attention to the compass on the bottom right of your screen . Rooms have names , there is a directional compass there . When on offense , take out the cameras . Learning their positions will be really helpful . To start with , there are 23 cameras on white poles outside . Watch some youtube videos .