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 504
, with occasionallya white strip. The darker colours are generally the more easilydistir.guished. CHAP. XXI.] SURVEYING FLOATING BEACONS 4-75 These large-sized flags require to be spacially strengthenedwith sacking or canvas material about 6 inches wide, sewnon both sides of the cahco along the… … Fig. ii6. ponent parts. Such design best withstands the strain occa-sioned in a strong wind, and if so constructed will last a longtime (first gradually frajdng from the fly), and are well worththe additional time involved in making them. When the loss of time that is involved should it…
Hydrographic surveying · Nautical charts
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