Ключевые слова: 412ep, aerospace, air force, aircraft, aircrew, armed forces, aviation, aviator, bell, bell 412, bell griffin, bell helicopters, chopper, cobham, cobham aviation, defence, defense, flight, fly, flying, griffin ht1, helicopter, hover, ht1, military, military aviation, officer, pilot, pilot training, raf, rotary wing, rotor, rotor blades, rotors, royal air force,