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Maryland Nautical Sales is an international chart agent stocking worldwide nautical charts British Admiralty, NOAA, NIMA, Canadian, Oceangrafix, Imray nautical books, navigation instruments, etc.

Cruisers Forum is an online forum community of cruisers from around the world!

MathWorks is the world’s leading developer of technical computing software for engineers and scientists in industry, government, and education

SailNet OnLine Community

Pilothouse Nautical Books and Charts is a retail store specializing in maritime information. If you are a weekend sailor, a professional mariner, a fisherman, an admiralty lawyer, or someone who enjoys a salty read, we have a selection of books, ch...

The Offshore Voyaging Reference Site

Daft Logic features tools, reference and projects relevant to web applications

The Great Circle Mapper displays maps and computes distances along a geodesic path. It includes an extensive, searchable database of airports and other locations.

The United States Naval Academy, established in 1845, is the undergraduate college for the Navy that prepares young men and women to become professional officers in the US Navy and Marine Corps.

ProMar Software develops navigation and celestial software for the professional mariner