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 36
other on large portions of the Earths surface. Plane Sailing also supposes the parallels of Latitude to be at right angles to the Meridians, and thi»ngth of a degree on the Meridian, Equator, and parallels of Latitude, everywhere equal. CASE L , The Course and Distance given to find the Difference… … Draw a horizontal line representing the parallel of Latitude sailed from; then with the Chord of 6P uthe dividers, and one foot on this line, describe a Semicircle; divide this Semicircle ,into equal parts of fOeach, (oi a Quadrant); divide the right hand Quadrant into 8 equal parts, which transfer…
Navigation · Nautical astronomy
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