The Boeing AH-64 Apache is an American four-blade, twin-turboshaft attack helicopter with a tailwheel-type landing gear arrangement and a tandem cockpit for a two-man crew. It is one of the most advanced attack helicopters in the world. It can carry 16 Hellfire Missiles, 72mm Rocket Pods, and a 30mm Chaingun underneath. The pilots can wear a helmet that aims the gun in the direction they are looking. Also it features a nose-mounted sensor suite for target acquisition and night vision systems. The AH-64 has a large amount of systems redundancy to improve combat survivability.