Fifty-eight selected navigational stars are given a special status in the field of celestial navigation.
2.
Celestial navigation systems are based on observation of the positions of the Sun, Moon, Planets and navigational stars.
3.
We set a steady course that was the best course for us, and our polar star, our navigational star, was hard news.
4.
In addition to tables, star charts provide an aid to the navigator in identifying the navigational stars, showing constellations, relative positions, and brightness.
5.
Historically, the star was frequently used in celestial navigation in the maritime trade, because it is listed as one of the 57 navigational stars.
6.
For purposes of identification, the positions of navigational stars & mdash; expressed as declination and sidereal hour angle & mdash; are often rounded to the nearest degree.
7.
The second typical use of the navigational stars is to determine gyrocompass error by computing the azimuth of a star and comparing it to an azimuth measured using the ship's gyrocompass.
8.
The sun is most commonly used, but navigators can also use the moon, a planet, Polaris, or one of 57 other navigational stars whose coordinates are tabulated in the nautical almanac and air almanacs.
9.
The people of Hawaii called it " Humu ", the people of the Tuamotus called it " Tukituki " ( " Pound with a hammer " )-they named Beta Aquilae " Nga Tangata " ( " The Men " )-and the people of Pukapuka called Altair " Turu " and used it as a navigational star.
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