THREE AXIS REFERENCE SYSTEM FOR NAVIGABLE CRAFT
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Abstract
A THREE AXIS REFERENCE SYSTEM FOR MOUNTING ON A CRAFT WHICH INCLUDES A VERTICAL GYROSCOPE FOR PROVIDING SIGNALS REPRESENTATIVE OF THE PITCH AND ROLL ATTITUDES OF THE CRAFT WITH A MAGNETIC FIELD DETECTOR STABILIZED ON THE VERTICAL GYROSCOPE TO PROVIDE SHORT-TERM HEADING SIGNALS. ANOTHER MAGNETIC FIELD DETECTOR IS REMOTELY LOCATED TO PROVIDE
LONG-TERM HEADING SIGNALS. THE SHORT AND LONG-TERM HEADING SIGNALS ARE COMBINED TO PROVIDE AN ACCURATE COMPENSATED AZIMUTHAL SIGNAL.
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