The submarine in war and peace; its developments and its possibilities (1918)
Lake, Simon, 1866-1945 · Philadelphia, London, J.B. Lippincott company · leaf 386
goes down to the bottom direct and thewater is forced out of the centre raking compartment so thatthe oysters may be seen by the operator in the control depart-ment. With only a few inches of water over them, headwayis then given to the submarine and the oysters are then auto-matically raked up,… … SUBMARINE OYSTER-GATHERING VESSEL By admitting water ballast into ballast tanks the vessel is allowed to sink to the bottomwith sufficient weight to afford traction to the toothed driving wheels in the central operatingcompartment. This compartment is open at the bottom; water is prevented from…
Submarines (Ships)
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