Navigational card sharp

Article Abstract:

Knowing the distances between turning points and the courses makes navigating a channel easier. These helpful statistics can be listed on a card. A sample card lists aids to navigation, their characteristics, new courses at turns, and the length of new legs.

Nautical charts, Navigation charts, Aids to navigation, Navigation aids

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Coast Guard issues DGPS warning

Article Abstract:

Differential global positioning systems (DGPS) are useful to sailors in charting their course. However, the US Coast Guard has warned that DGPS' unmonitored use may involve service interruptions without advance notice.

Safety and security measures, Geographic information systems, United States. Coast Guard

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Getting through VHF clutter

Article Abstract:

Digital Selective Calling will be a standard feature on VHF-FM radios and marine HF radios by 1997. The system will use channel 70 to send signals directly to the receiving boat.

Marine radio

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