Author(s): Thomas A. Coulet
Published in: NAVIGATION, Journal of the Institute of Navigation, Volume 17, Number 2
Pages: 136 - 141
Cite this article: Coulet, Thomas A., "THE USE OF PULSED DOPPLER SONAR FOR NAVIGATION OF MANNED DEEP SUBMERGENCE VEHICLES", NAVIGATION, Journal of The Institute of Navigation, Vol. 17, No. 2, Summer 1970, pp. 136-141.
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Abstract: This paper describes the doppler sonar navigation system recently developed for deep submergence vehicles and other similar advanced doppler systems currently employed for a variety of ocean navigation purposes. A discussion of the doppler principle and its utilization in pulsed rather than CW operation is presented. The pulsed techniques have sub- stantially increased the altitude above bottom capabilities for navigation with respect to the ocean floor. For altitudes above 600 feet, accurate navigation is obtained by utilizing volume reverberation from the water mass beyond the boundary layer of the vehicle. The doppler navigator developed for deep submergence accurately determines instantaneous velocities in each of the three vehicle coordinate axes. This information plus heading and attitude information from a precision inertial platform is utilized in the general purpose computer to form a self contained navigation system. In other applications, the heading reference may be obtained from a gyro compass while an inclinometer provides attitade information which again is processed with the doppler velocities providing a complete navigation capability. Other advanced systems currently in operation on surface ships utilize satellite derived position fixes for continually updating and correcting the doppler determined velocity and position information. Operational experience and test data obtained during development testing of doppler navigation systems is presented and discussed.