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 31
Fig. 9. DEVIATION OF THE COMPASS. Art. 38. The Deviation is tne error of the compass caused by attraction of the iron of the snip, anddepends upon the quantity, the kind of iron, and its position with respect to the needle. It is named easterly or-ivesterly according as the north point of the…
Navigation · Nautical astronomy
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