COGLAD: A Coast Guard Loran-C Assist Device.
JOHNS HOPKINS UNIV LAUREL MD APPLIED PHYSICS LAB
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The Coast Guard Loran-C Assist Device COGLAD was developed at the request of the Systems Development Branch of the United States Coast Guard to enhance the shipboard use of Loran-C. The Atlantic coast and most of the Great Lakes are within the range of high quality ground-wave Loran-C signals however, some form of data processing is necessary to make the awkward hyperbolic grid system of Loran-C easier to use. Using a commercial Loran-C receiver, a programmable calculator, and an interface unit, COGLAD provides the navigator with heading angle, relative position information, velocity information, and a real-time plot of ships position on standard navigation charts. COGLAD is currently installed on a buoy tender operating out of Port Huron, Michigan, and has been used successfully as a navigation aid since January 1971. Author
- Underwater and Marine Navigation and Guidance