Celestial navigation simplified.THROUGHOUT the history of the world, many of man's most spectacular accomplishments have been the work of navigators. No matter whom you credit with the discovery of America--Columbus, Vespucci, Leif Ericsson Leif Ericsson (lēf ĕr`ĭksən), Old Norse Leifr Eiriksson, fl. A.D. 999–1000, Norse discoverer of America, b. probably in Iceland; son of Eric the Red. , or even some anonymous Irishman--the fact is that the skill of the navigator has changed the world forever by developing the trade and migration routes to new lands formerly separated, now connected, by great oceans. Before the advent of modern inertial and satellite navigation systems satellite navigation system satellite n → système m de navigation par satellite , the human navigator with a sextant sextant, instrument for measuring the altitude of the sun or another celestial body; such measurements can then be used to determine the observer's geographical position or for other navigational, surveying, or astronomical applications. was the primary means of guiding a ship or plane from one land mass to another over a body of water. It takes a good deal of training to produce a navigator, a fact that discourages most people from taking it up as a hobby. However, once one has finished with the academics, the practice of celestial ce·les·tial adj. 1. Of or relating to the sky or the heavens: Planets are celestial bodies. 2. Of or relating to heaven; divine: celestial beings. 3. navigation is fairly simple, involving mostly the addition or subtraction subtraction, fundamental operation of arithmetic; the inverse of addition. If a and b are real numbers (see number), then the number a−b is that number (called the difference) which when added to b (the subtractor) equals of a few numbers, and knowing which table to consult. There is no great math skill involved, at least since the advent of modern navigation almanacs Almanacs See also astronomy; calendar almanagist a person who compiles almanacs. ephemeris an astronomical almanac giving, as an aid to the astronomer and navigator, the locations of celestial bodies for each day of the year. and tables. If celestial navigation is so easy, then why would most people, even small-boat sailors with a presumed need to know it, rather have their wisdom teeth out than learn it? The reason is that courses teach why celestial works rather than simply how it works. Until now. William F. Buckley Jr. has advanced the cause of navigation by making the learning of it completely pain-less. In just forty entertaining minutes, Mr. Buckley gives you all the basics of celestial navigation--something that took me many long, painful weeks to learn. Mr. Buckley's videotape, Celestial Navigation Simplified, is clear, concise, accurate, and even fun. I can think of no better way to increase your enjoyment of sailing the seas (or just expanding your horizons) than by joining the ancient and honorable fraternity of navigators. |
|
||||||||||||||||||

Printer friendly
Cite/link
Email
Feedback
Reader Opinion