A Loran-C Precision Guidance System with the capability to be used as a research and development tool was designed and assembled for the purpose of examining the feasibility of using Loran-C to navigate ore carriers in the St. Marys River. The system consists of a Loran-C receiver, a mini-computer, a mini data station for displaying navigational data, a flexible disk system, a 17-inch graphics unit for displaying a prestored representation of the St. Marys River, and a gyrocompass interface unit for interfacing with ship's gyrocompass. The system was initially installed on the U.S. Coast Guard Cutter NAUGATUCK, a 110-foot tug boat, for calibration, verification, and demonstration, in conjunction with a special four-station Loran-C 'Mini-Chain' on the St. Marys River. Later the system was installed on the USCGC MACKINAW, a 290-foot icebreaker, for further evaluation and demonstration. Positional jitter of 50 to 75 feet (2dRMS, 95%) was achieved. Additional testing will be done aboard an ore carrier to determine how well the system meets the Coast Guard's accuracy objective of + or - 25 feet maximum cross-track error 95% of the time.
Saint Marys River LORAN-C. Precision Guidance System. Volume I. System Definition
1977
141 pages
Report
No indication
English
Precision Loran-C navigation on the St. Marys river
Tema Archive | 1978
|Precision LORAN-C navigation on the St. Marys river
Tema Archive | 1977
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NTRS | 1983
|Engineering Index Backfile | 1945