After waiting for 3–5 seconds, it turns red and the missile is locked on. When pointed at a vehicle, the marker is green. Unlike the Rocket Launcher, the Heat-Seeking Rocket Launcher automatically selects the nearest available target. Performance Grand Theft Auto: San Andreas The Heat-Seeking Rocket Launcher is based on the Russian/Soviet SA-7 Grail, only that the version depicted in-game is up-sized, with a shorter length and wide tube.