US Patent 7266446 Helmet mounted tracking system and method

A helmet mounted tracking system for target designation includes an airplane azimuth sensor, a helmet mounted azimuth sensor, an airplane pitch sensor, a helmet mounted pitch sensor, and a processor. The airplane azimuth sensor determines an azimuth heading for an airplane. The helmet mounted azimuth sensor determines an azimuth heading for a helmet that is worn by a pilot. The airplane pitch sensor determines a pitch for the airplane. The helmet mounted pitch sensor determines a pitch for the helmet that is worn by the pilot. The processor is in operative communication with the airplane azimuth sensor, the helmet mounted azimuth sensor, the airplane pitch sensor, and the helmet mounted pitch sensor and the processor is processes instructions from each of the sensors to determine a target pitch and a target azimuth.