A new treatise on the practice of navigation at sea : containing all the details necessary to enable the mariner to become a good practical navigator. (1902)
Thoms, William · New York : Printed for the author and sold by John Bliss & Co · leaf 93
from the first point of Aries. Sidereal Time begins when the first point of Aries is on the Meridian, and is counted through the 84hours, till the same point returns again, which is called a Sidereal Day, and consists of 23 hours 56 mm-Btes 4 seconds of Common or Mean Time. The Hour Angle of the… … tK th%* Figure the Spectator ts supposed to be standing on the North Pole, facing toward tht South, havinr East on the Right hand and West on the Left. TO CONSTRUCT THE FIGURE. Take 60* from the Chords and describe a circle which will represent the Celestial Equator. Draw aperpendicular line to…
Navigation · Nautical astronomy
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