[Coffin, John Huntington Crane], 1815-1890. [from old catalog] · New York, D. Van Nostrand · leaf 29
dle Latitude Sailing suffices for the common pur-poses of navigation; but a more rigorous solution of pro-blems relating to the loxodromic curve is needed. Thesesolutions come under Mercators Sailing. Pkoblem 5. A ship sails from the equator on a givencourse, C, till she arrives in a given… … Fig. 7. P, its centre, is the pole (the eye or projecting point beingat the other pole).* The radii, PA, PB, PC, &c, are meridians making thesame angle with each other in the projection as on the sur-face of the sphere.* The distance P m, of any pointm from the centre of the projec-tion,…
Navigation · Nautical astronomy
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