A treatise on surveying and navigation: uniting the theoretical, practical, and educational features of these subjects (1857)
Robinson, Horatio N[elson], 1806-1867. [from old catalog] · Cincinnati, J. Ernst; Toledo, Anderson, Burr, & co. · leaf 181
at right angles with the other, the whole balanced by acentral weight which keeps the compass card nearly steady and hori-zontal, whatever be the motion of the vessel. The card is attached to the needle, and is moved by the needle.The card is divided into 32 equal parts, called points, and to… … The figurebefore us re-presents thecard of themarinerscompass. Thefour quadrantpoints aremarked by asino-le letter as2\T. for north,E. for east.The midwaypoints betweenthese by twoletters, as JV.E. for north-east, N. W. for north-west, &c. One point either way from any oneof these eight points…
Surveying · Navigation
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