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 224
ine of 7-stranded sounding-wire or cod-line, with Sounding7 pounds lead, will enable soundings in shoal water to be 9^ ^^^^obtained at intervals of a few feet merely by lifting the lead Scales,off the bottom and letting it go again for a fresh cast withouthauling it up and heaving it in the… … In sounding a harbour channel on a large scale, it is often soundingconvenient to stretch a lead-line across from side to side, and Sections,sound at regular distances apart by this line, shifting it foreach section required. Sweeping for a reported pinnacle rock is resorted to when…
Hydrographic surveying · Nautical charts
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