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 476
ld be slightly shortened, or, ifpreferred, the speed of boat sUghtly reduced, which will havethe effect of making them close, though reduction of speed willalso cause sweep to be slightly deeper owing to otters then beingtowed shghtly below surface. A man is stationed at each machine watching… … Length 35!2 inchesDepth 18 inchesMade of lls Kauri PineTotal weight 46 lbs.Screw Eije-boHs 2in. fronr ends ,, ,, „ 7 in. from Top and bottom Fig. 105. wire to ease strain till boat has gathered sternway; the kitewires are then hove in, otter boards taken off, and sweepcleared. If sweep is badly…
Hydrographic surveying · Nautical charts
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