Hydrographical surveying : a description of means and methods employed in constructing marine charts (1920)
Wharton, W. J. L. (William James Lloyd), 1843-1905, Field, Arthur Mostyn, 1855- · London : J. Murray · leaf 542
Fig. Ill-—Illustrating a Beacon Triangulation connected by Station-PointerFixes and True Bearings to triangulated Shore Objects at Night byTwo Ships simultaneously intervisible at Beacons i and 13 by means ofSearchlights. The Co-ordinates of the Shore Objects are known. CHAP. XX r] SCHEME OF… … Haisboro Lt.VI.Lt. Gp.FI. eu. 30 sec.Vis. 11m.Stan t from Z Isteuening Haisboro\Lt.Ho.Lt. Occ. ek 30 sec. Vis. 11m,Not \laited fig. IV. — Illustrating a Floating Triangulation connected to the ShoreObjects, where it is desired to fix the Positions of the Lightvessels in add.tion to examining the…
Hydrographic surveying · Nautical charts
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