The submarine in war and peace; its developments and its possibilities (1918)
Lake, Simon, 1866-1945 · Philadelphia, London, J.B. Lippincott company · leaf 314
his oscillator andimproved sound detector, with which it is possible for sub-marines to carry on wireless conversations under water whenat a distance of several hundred feet apart, and to pick upthe characteristic sounds of different types of surface shipsat considerable distances. Sound detectors… … » . o ■f
Submarines (Ships)
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
