So you got your aircraft ready and modelled up but you're feeling that need to go fighter pilot on the world.... well lets go tactical then. You're gonna need a way for the aircraft to inform you if a hostile target, either air or ground has painted you as target or has fired a missile at you. This is your answer, an RWR. Through a small antennae on the nose, this little bugger detects radar signatures and displays the info on its whereabouts to the pilot through a small triangle or square in relation to the aircraft. Find a 4 inch by 4 inch area in the cockpit and slide this puppy on in. Guaranteed to inform you of incoming threats or your money back...... if you come back.