The American practical navigator : being an epitome of navigation and nautical astronomy (1888)
Bowditch, Nathaniel, 1773-1838, United States. Navy Dept. Bureau of Navigation, Cooper, Philip Henry, 1844-1912 · Washington : Govt. Print. Off. · leaf 61
current be corroborated by a change in the temperature or density of the water, then, and only after^carefitllyweighing all the circuDistanees, should the Navigator enter in tlie log that there is a current. It should be givenin knots and tenths of a knot pei hour, and its set to a definite whole… … INSTRUMENTS EMPLOYED IN NAVIGATION. 29 possible—lhe»(leviation for the particular course the ship was heading at the time shall, in all instances, be separ-ated from the wliole compass-orror, and only the 7ariatio)i proper shall be entered in the h{i;: Write before tlie vari-ation tlie latitude and…
Navigation · Nautical astronomy
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