The elements of navigation : containing the theory and practice, with all the necessary tables, to which is added, a treatise of marine fortification ... (1754)
Robertson, J. (John), 1712-1776, Adams, Charles Francis, 1807-1886, former owner. BRL, Adams, John, 1735-1826, former owner. BRL, Boston Public Library) John Adams Library BRL · London : Printed for J. Nourse ... · leaf 275
n the Jhip departed from, and kept on a weft courfe 8 mi leihour: Required the Jbips direct courfe and prefeni latitude ? I P j^Now 3 days is 72 hours, which at 74 knotshour, makes 540 miles for the {hips run.And 2 days is 48 hours, which, at 8 knots an h<makes 384 miles for the floops run, and… … As Dift.ToRadSo Dep. ~ 540 m. 90° coy 7.26761 10,00000 2,58433 zz 384 m.To fin. Cou. = 45° 20 9,85 {94 6,0)38,0(6* 20 As Rad zz 90*00 10,00 To ibiii. zz 540 m. 2,73 So cof. Cou. = 450 20 9,84 To diff. lat. s= 379,6 2,57 . , J Courfe S. 45°- 20 W. or !And (380 25 4- 6° 20 5=) 440 453. Wer LPrefent…
Navigation · Nautical astronomy · Fortification
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