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Celestial Navigation by Tom Cunliffe PDF

By Tom Cunliffe

ISBN-10: 0470666331

ISBN-13: 9780470666333

Guiding a craft utilizing one of many oldest of the mariner's arts-celestial navigation As romantic--sounding as crusing to Tahiti did centuries in the past, utilizing the sunlight, moon, planets, and stars to lead one's boat at the seas is having fun with a comeback. if you happen to don't desire to be stuck brief while sleek expertise fails on board, realizing easy methods to chart a course by means of a sextant is a necessary navigating ability. In Celestial Navigation , veteran yachtsman, Tom Cunliffe, finds how any boat proprietor can grasp this seafaring procedure, with no complicated arithmetic, utilizing his simplified strategy. Readers start with a valid beginning of uncomplicated ideas and definitions, prior to relocating directly to the hardware-the sextant and the way to exploit it. inside of a number of pages, you may be figuring out your range from a midday sight, and studying the way to plot a place from staring at the sunlight, planets, moon or stars-or anywhere you will be at the world's oceans.Helps readers arrange for the RYA Yachtsmaster Ocean examination, such as celestial navigation as a demand contains transparent diagrams and labored examples to aid advisor the amateur navigator re-creation has downloadable fabric, a brand new bankruptcy on digital navigation in addition to the bonus function of on-line video demonstrations no matter if getting down to sea on a quick or lengthy trip, Celestial Navigation is an important consultant to utilizing the sunlight, moon, planets, and stars as your guideposts domestic

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Example text

Sight reduction You will almost certainly be reducing your sights using sight reduction tables. These come in Using Sun sights to give a running fix. Taking the distance run between sights indicated on the log, the forenoon PL has been transferred along the bearing of the track to intersect with the noon latitude. The afternoon sight has been run back to the noon line in the same way to give a ‘cocked hat’. This should give a good indication of the noon position, but owing to the AM intrinsic inaccuracies of the running fix the technique cannot be run relied upon.

DISTANCE RUN BETWEEN STAR SIGHTS We have seen that the great benefit of a set of ‘simultaneous’ star sights is that the element of a ‘run’ between sights is removed and the resulting fix can be far more accurate in consequence. Unfortunately, if your boat is sailing at six knots and it takes you 25 minutes to shoot all your stars, she will have travelled two and a half miles through the water between the first and the last sight. If you’re racing an ‘Open 50’, the distance may well be seriously significant.

7/14/2010 3:53:30 PM 28 CELESTIAL NAVIGATION Table 1. Daily page from The Nautical Almanac. indd 28 7/14/2010 3:53:30 PM TABLES 29 Table 2. Daily page from The Nautical Almanac. indd 29 7/14/2010 3:53:30 PM 30 CELESTIAL NAVIGATION Table 3. An increment (yellow) page from The Nautical Almanac. indd 30 7/14/2010 3:53:31 PM TABLES 31 Table 4. An increment (yellow) page from The Nautical Almanac. indd 31 7/14/2010 3:53:31 PM 32 CELESTIAL NAVIGATION Table 5. Increments and corrections from The Nautical Almanac.

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Celestial Navigation by Tom Cunliffe

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