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 150
de 25* (f Suns Polar Distance 107° True Altitude 25 Latitude. 38 5 S.0 6 0 Log. Secant 30 Log. Secant Sum ..170° 36 Half Sum 85° 18. Log. Co-Sine ) Difference 21° 47 Log. Co-Sine ) Table XXVII Table XXVIII 0.042720.10646 3.918494.9678S Fig. 19, Supplement of the Angle in Time, 2h 32m 578, Table… … In the above fi^re, (to the left), both Azimuths are on the same side of the Meridian, and their Difference is the Variation Westerly, because the True Azimuth is to the Left of the Magnetic Azimuth. EXAMPLE 2. April 16th, 1864. Sea Time, in Latitude 40° N., Longitude 120° W.. the Observed Altitude…
Navigation · Nautical astronomy
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
