Navigation Sensor System Interface (NAVSSI)

Kevin J. Cowley

Abstract:	NAVSSI is a State-of-the-Art Integrated Shipboard Navigation System being developed by NCCOSC and Naval Sea Combat System Engineering Station (NSCSES) under the joint direction of the Space and Naval Warfare Systems Command (SPAWAR) and the Naval Sea Systems Command (NAVSEA). The system will provide a major upgrade in the Navy’s Navigation capability. It will meet the fleet requirement to automatically accept and process data from the Global Positioning System (GPS) and other ship Navigation sensors and send precise, uniform, real-time position, velocity, almanac and time data to the Navigator, Combat systems and Command, Control, Communications, Computers, and Intelligence (C41) systems. The system is planned for installation on 284 Surface Ships by 1997. Specific topics addressed in the paper and presentation include: Fleet Requirements for NAVSSI NAVSSI Development History (Extension of the Navy’s GPS Program) Architecture of the Basic System Principles of Operation and Selection Algorithms Relationship with GPS and Inertial Systems Pre-Planned Product Improvements (P3I) Electronic Charting (Possible ECDIS/ Legal Charting) NAVSSI is being developed as a basic unit with added capabilities provided through P31 efforts. The system is composed of primarily Of f-the-Shelf and government developed items, which allows reduction of procurement cost and time. GPS, Inertial Navigation System (INS), Radio Navigation Sensors, gyrocompass, speed log and the Navigator’s workstation (NWS) and provides Navigation data to the Navigator, Combat , C41 and INS. If GPS is degraded, selection algorithms determine the best source of data for distribution throughout the ship. A bridge work station provides the bridge watch team with numerous mission planning capabilities.
Published in:	Proceedings of the 1992 National Technical Meeting of The Institute of Navigation January 27 - 29, 1992 Catamaran Resort Hotel San Diego, CA
Pages:	225 - 234
Cite this article:	Cowley, Kevin J., "Navigation Sensor System Interface (NAVSSI)," Proceedings of the 1992 National Technical Meeting of The Institute of Navigation, San Diego, CA, January 1992, pp. 225-234.
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