 In fulfilling its then primary mission of training all CH-46E pilots and crew chiefs, HMT-204 has trained over 1,800 CH-46E replacement aircrew (basic, refresher, modified refresher and conversion pilots), over 275 instructor pilots and over 450 crew chiefs.Additionally, over 100 AV-8B pilots have completed the vertical flight familiarization syllabus, in the CH-46.In December 1995, HMT-204 broke new ground for training pilots and crew chiefs in night formation, night vision goggle operations, terrain flight, navigation and formalized aircrew coordination training.