ST. MARYS RIVER LORAN-C PRECISION GUIDANCE SYSTEM--VOLUME I--SYSTEM DEFINITION
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 minicomputer, 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 +25 feet maximum cross-track error 95% of the time.
- Prepared for U.S. Department of Transportation, United States Coast Guard Office of Research and Development, Washington, D.C. 20590.
Teledyne Systems Company19601 Nordhoff Street
Northridge, CA United States 91324
- Publication Date: 1977-2
- Pagination: 141 p.
- TRT Terms: Equipment tests; Evaluation; Graphics; Loran C; Maneuvering; Navigation; Navigation devices; Navigation systems; Radio navigation; Rivers; Ship pilotage
- Geographic Terms: Great Lakes
- Old TRIS Terms: Graphic displays; Navigation equipment; Restricted water operation; River navigation
- Subject Areas: Marine Transportation; Operations and Traffic Management;
- Accession Number: 00188831
- Record Type: Publication
- Source Agency: United States Coast Guard
- Report/Paper Numbers: CG-D-57-77 Final Rpt.
- Contract Numbers: DOT-CG-61419-A
- Files: TRIS
- Created Date: Mar 14 1979 12:00AM