Wilkinson, Henry Daniel, 1857- · London : "The Electrician" Printing and Pub. Co. Limited ; New York : D. Van Nostrand Co. · leaf 65
speed between 5 and 13 knots. Conse- TE TT EE I aT EE === eo Fic. 26.—Sentry overturned. quently, the apparatus stays at any fixed depth in the water (at which it is originally set), notwithstanding that the ship may alter her speed within the above limits. The moment the lower end of the striker… … Fic. 27.—Sentry Winch. “kite” action, and simply turns over and floats to the surface like any ordinary piece of wood (Fig. 26). The release of the strain on the towing wire resulting from this action causes a bell to ring, announcing to those on board that they have only so many fathoms under…
Cables, Submarine
Internet Archive · MBLWHOI Library · Public domain (published before 1931). Free to use for anything.
