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Show Searching Ocean's Dspths. The latest Invention in nautical devices de-vices now In use on a pilot boat Is a machine which throws a beam of light to the sea bottom allowing the depth of the water below the ahlp to be gauged. Soundings may thus be done away with. The Invention may be usefully use-fully employed by the big liners In entering en-tering shallow water. The searchlight Is worked through a hole In the lower part of the ship, while an observation observa-tion window is placed nearby through which the beam of light my be seen. A mirror Is set at the end of a long observation tube running vertically through the ship to the bridge. |