Popplewell, William Charles, 1865- · London, New York [etc.] Longmans, Green and co. · leaf 215
rd station onshore, C, that is, the angles OA, C^A, OA, G/A, etc. No one ofthese angles should be less than 30°, and the position of C mustbe chosen accordingly. When plotting it is only necessary to draw a 198 THE ELEMENTS OF SURVEYING AND GEODESY line CX parallel to AB, and from it to set off the… … FIG. 156. ranges, AB and EF (Fig. 157), whose intersection is the point in question. Soundings.—The object of nautical surveying is mainly to fix on a chart the positions of a number of soundings. These may be taken on a fixed line (Fig. 156) so as to provide a section of the shore on the line; or…
Surveying · Geodesy
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