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CruisingWiki

The Earth Science text book

The Earth Science text book has a nice interactive site. Imagine that you had a sailboat available for your use and you were asked to participate in an around-the-world race beginning tomorrow. Use what you know about global winds and ocean currents to choose a route you would follow to sail around the world in the shortest time.

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Sextants as a backup ;-)

GPS is wonderful. World-wide coverage and reasonably priced receivers (both installed and handheld) contribute to maritime safety through accurate positioning of vessels. Yet, some back-up is needed. Celestaire produce a traditional sextant that can be used as an effective backup

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HMNAO

HMNAO also produces astronomical data suitable for a wide range of users, including professional and amateur astronomers, mariners, aviators, surveyors, the armed forces, lawyers, religious groups, architects, schools, diary and calendar publishers, photographers and film crews. This information can be accessed via the web by using Websurf.

This facility is in a beta test phase and the data produced by this service are for personal use only. Those without web access should contact the Astronomy Information Service of the Royal Observatory, Greenwich. All commercial users should contact HMNAO directly

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