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 285
ad zr 450 oo7 10,00000 Tot.Z.BCF,t.Co.= 14 55 9>4Z596 As fin. Cou. r: 140 55 0,58To Dep. = 28 m. 1,44 So Rad z: 90 co io.cp To Dift. = 108,8 2,03 Anfvver : Courfe is S. 140 15 W. or S. b. W. * W. Dift. 108,8 miles Quest. IX. A JJnp from latitude 140 25 N. and bound to a pomlatitude 50 18 N.… … Lat. IroinLat. to Diff. lat. AUAE »4 5 25 N.18 N. 9 07 ~ 547 miles. CF 547400 H7 Then cf : fbAnd f, Z.FCB DBEC FB Rad : t. Z.ecf. Or 147 : %z6 : : t. 450 : t. 650Rad : cb. 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…
Navigation · Nautical astronomy · Fortification
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