A new treatise on the practice of navigation at sea : containing all the details necessary to enable the mariner to become a good practical navigator. (1902)
Thoms, William · New York : Printed for the author and sold by John Bliss & Co · leaf 184
from Cape Henry 50 miles. A line drawn parallel to the Course made in the interval, through the True place of the Ship, back t9 the first linewill show the Ships place on that line, when the first Altitude was observed, in Latitude 37 18m N. and Longitude14° 43 W. Hence the Ships Latitude by Dead… … ■^k-POSITION
Navigation · Nautical astronomy
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