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.


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    Titel :

    Saint Marys River LORAN-C. Precision Guidance System. Volume I. System Definition


    Erscheinungsdatum :

    1977


    Format / Umfang :

    141 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




    Precision Loran-C navigation on the St. Marys river

    Olsen, D.L. / Stoltz, J.R. | Tema Archiv | 1978


    Precision LORAN-C navigation on the St. Marys river

    Olsen, D.L. / Stoltz, J.R. | Tema Archiv | 1977



    Loran system

    Engineering Index Backfile | 1945