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Celestial Navigation - Sextant Use & the Sun Noon Shot
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| Price: | $29.95 & eligible for FREE Super Saver Shipping on orders over $25. Details |
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Average customer review:
Product Details
- Amazon Sales Rank: #181259 in DVD
- Released on: 2007-06-28
Editorial Reviews
amazon.com
Magic Lamp skipper Gene Grossman conducts the first lecture in this 2 hour program, and thoroughly covers the basic theory of Celestial Navigation, and how a sextant measures the sun?s altitude at local apparent noon, to provide both latitude and longitude of the vessel. Gene covers all the basic vocabulary involved, and shows how valuable the Nautical Almanac is as a locator of the Sun for every second of the year. He then goes on to explain how certain corrections must be made when using a sextant, and the basics of the celestial sphere. The second lecture is done by Paul Miller, CEO of the California Sailing School, and a former instructor at the United States Naval Academy. Paul demonstrates how to hold, use, adjust, and read a sextant. He then goes on to take the viewer through a step by step Sun shot at apparent noon, filling in each blank on the worksheet until the latitude and longitude is determined. Chapters in this program include: * Latitude & Longitude * Declination & GHA (Greenwich Hour Angle) * Using the Nautical Almanac * Geographical Position (Ground Point, or GP) * Reading the Sextant * Sextant Corrections for Dip, Limb and Index error * The Sun Noon Shot Once the viewer has completed this program, he or she is ready to advance to the next stage of Celestial Navigation, using the Moon, Stars, and Planets. This next program is also two hours, and shows how to use the Sight Reduction Tables to navigate and night. More details about this program, Magic Lamp item number 203, can be seen at boatingdvd.com where many other nautical programs are shown on Navigation, Coastal Piloting, Sailing, Cruising, Power Boating, and just about every other nautical topic imaginable.
Customer Reviews
O.K. I guess for the ABSOLUTE beginner
No views through the Sextant, No animation. Just a guy sitting at a small desk with some paper charts on an easel, talking. I could have learned as much by reading a book. Not cheap either. I was personally disappointed.
