The submarine in war and peace; its developments and its possibilities (1918)
Lake, Simon, 1866-1945 · Philadelphia London : J.B. Lippincott Co. · leaf 346
at parts ofthe year, and also for purposes of exploration and ofscientific study. All navigators know the difficulty of attempting to breaktheir way through the ice fields, since it requires a vesselof tremendous power and great weight to break down orthrough solid ice. A vessel of this type was… … THE SUBMARINE IN TIMES OF PEACE Professor Nansen, in his North Polar explorations, hasstated in his book that his average rate of progress duringeighteen months, in attempting to reach the North Pole,was only three-quarters of a mile per day, and that thethickest ice he found during these months of…
Submarines (Ships)
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