 Smaller combat surveillance UAVs may be launched with a pneumatic, hydraulic, or electric catapult, with the very smallest launched by an elastic-bungee catapult.The tactical reconnaissance UAV is usually larger, jet powered, with longer range and higher speed.Like a combat surveillance UAV, it has an autopilot with radio control backup, but it relies more on the autopilot than on radio control, since its primary mission is to fly over predesignated targets out of line of sight, take pictures, and then come home.