74002911
Nov 16, 1989
Jun 9, 1992
AUTOMATIC SEXTANTS; AUTOMATIC SEXTANT SYSTEMS COMPRISING A SEXTANT, ANGULAR SETTING DETECTION SENSORS AND ENCODERS, UNITS TO CONTROL AND RECORD SEXTANT SETTING AND TIME READINGS, A CELESTIAL NAVIGATION COMPUTER, DISPLAY AND CONTROL PANELS, AND PARTS THEREFOR; SOFTWARE FOR AUTOMATIC CELESTIAL-NAVIGATION SYSTEMS
Electrical and Scientific Apparatus