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

An illustration from The elements of navigation : containing the theory and practice, with all the necessary tables, to which is added, a treatise of marine fortification ..., 1754, leaf 286 — ance is 999 miles. .Quest. XI. A Jhip from the lat. io° 38 N. and bound to a port lying©2 miles to STV. b. S. after three fuccejjive days of badiueatber, finds her-ff in lat. 30 58 N. and 120 miles to the eajlward: Required her prefenttirfe and dijlance to her intended port f A ivl The figure is… … AEAD ~ 400 — -^4>j ^ifr. lat. 6 40 = 400 m. de = cp = ^5,5 BD EC s6,6. — 276,6 In the triangle cfb find the courfe and diftance.s cf : fb : : R : t.z.FCB. Or 165,5 : 276,6 :: Rad : t. 590 06.s f. /_ fcb : fb : : R : cb. Or f.59°6^i 276,6 :: Rad : 322,4. \ Diftance is 3^2,4 miles. Qpfrr. 262…

Navigation · Nautical astronomy · Fortification

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The elements of navigation : containing the theory and practice, with all the necessary tables, to which is added, a treatise of marine fortification ... (1754)

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