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 39
ng Points or Degrees ofthe Quadrant, and the angle of the Course beips jrreater, the Latitude and Departure columns are reversed at fh<» BoV, and miUKet voordipi?!. 12 PLANE SAILING. CASE V. The Course and Departure given to find the Distance and Difference of Latitude. Example.—A Ship from Lat.… … PROJECTION BY THE PLANE SCALE. Draw a horizontal line to represent the parallel of Latitude sailed from. Take the Chord of 60° in th«dividers, and with one foot on this line as a Centre, make the Arc of a Circle towards the left downwards,which will represent the South-West quarter of the Compass.…
Navigation · Nautical astronomy
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