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 151
quantities whichithey carry to and fro, and stowed in different parts of the vessel as cargo, renders every Ship liable tonave her Compasses deranged by Local Attraction. And the general effect which Iron, s^ituated in th»» lor-ward part of a vessel, has on the Compass, is to draw the North end of… … fflten the Attracting Force is Forward. In the above figure, the dotted line will show the course intended to be steered, which in the one ca*e u4!ast. But the North end of the Needle being drawn forward from the effect of the Local Attraction,.{Caused by the Iron forward acting on it), the Ship is…
Navigation · Nautical astronomy
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