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 286
Or f. 650 44 : 326 :: f. 90° : 35 Aafwer. Courfe is S. 65 44 E.; or SE. b. E, | E. Diftance 357° nQv £T 6 . PLANE SAILING. 261 Quest. X. Four days ago we were in lat. 4«- 39 S. long. S^* 16 E.t London ; and now we are in lat. o° 35 N. having made 200 miles of1fling: Required our prefent courfe… … Long, from 830 i6E.Long, to 95 55 E. DifF. long. 12 39 = 759 miles. AD AE 5943H ed —: 280 =: cf. db = 759 FD — 200FB ±; 959. CE In the triangle cfb, to find the courfe and diftance.IscF : fb :: Rad : t.z_FCB. Or280 : 959 :: t.45°oo : ^73*43.if.Z.FCB : fb :: Rad : cb. Orf.73°43: 959 : : f. 9c0 00:…
Navigation · Nautical astronomy · Fortification
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