Virtual Cockpits

.Virtual Coupled Airborne System Simulator (USAF)

.Virtual Enviroment configurable training aid(Brough, British Areospace)

.Real and virtual enviroment configurable training aid(Brough)
 - mix a virtual world with a real world.
 - concept:
  mount a color TV camera onto a HMD and couple the resulting video 
  into HMD via a chroma processing system.