Implementation of the U.S. Coast Guard's Differential GPS Navigation Service

Douglas H. Alisp, Jean M. Butler, and James T. Radice

Abstract:	The U.S. Coast Guard has a project to provide Differential Global Positioning System service for harbor and harbor approach (HHA) areas of the coastal United States. The Great Lakes, Puerto Rico, and most of Alaska and Hawaii will also be covered by the service. The Coast Guard’s DGPS system will fulfill the 5-20 meter navigation accuracy requirement for HHA with a signal availability exceeding 99.9%. The Coast Guard intends to provide this service to the general public and other government agencies, as well as use the system for its own missions. This capability is expected to enhance maritime safety in keeping with the National Transportation Policy by providing an all-weather radionavigation service to supplement existing radar and visual piloting techniques, as well as a highly accurate position sensor for future electronic chart displays. This paper provides an update on the Coast Guard’s program. Various aspects of the Coast Guard’s plan for implementing DGPS are described along with present and anticipated levels of performance. The involvement of other Federal Agencies is also described and a project time line is presented.
Published in:	Proceedings of the 49th Annual Meeting of The Institute of Navigation (1993) June 21 - 23, 1993 Royal Sonesta Hotel Cambridge, MA
Pages:	707 - 716
Cite this article:	Alisp, Douglas H., Butler, Jean M., Radice, James T., "Implementation of the U.S. Coast Guard's Differential GPS Navigation Service," Proceedings of the 49th Annual Meeting of The Institute of Navigation (1993), Cambridge, MA, June 1993, pp. 707-716.
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