The new American practical navigator : being an epitome of navigation, containing all the tables necessary ... (1802)
Bowditch, Nathaniel, 1773-1838, Lee, Marvin, former owner. DSI, Stuart, Gilbert, 1755-1828 DSI, Burndy Library, donor. DSI · [Salem] : Printed at Newburyport, Mass., 1802, by Edmund M. Blunt, for Cushing and Appleton, Salem : Sold by every book-seller, ship- chandler, and mathematical-instrument-maker in the United States and West Indies · leaf 217
and it is done ; for AC is the courfe fleered by thefecond fhip, which is nearly E.S. E. i E. and BC is the diilance V of the fhips 17^ miles. By LOGARITHMS.■ The courfe from B to G is S. S. E. (oppofite to N. N. W.) and from Bto A is S. W. \ W. (oppofite to N. E. £ E.) the difference between… … i.301039.980871.20412 11.184991.30103 9.88396 To find the diilance of the fhips BC. . Add the angle C±=49° 57 to theangle B 730 7, the fum 1230 4 beingfubtradled from 180° leaves the angleCAB 560 S6;. As fi. ang.ABC 7 3°7 ar.cc-0.01913Is to the fide AC 20 miles 1.30103So is fine CAB 560 56 9.92326…
Navigation · Nautical astronomy
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