Maritime History of the Great Lakes

Marine Review (Cleveland, OH), June 1928, p. 1

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Nerime Review a Se ie Sex ‘‘The Fathometer has solved the problem of depth sounding in a way that has been needed for centuries, and by giving a constant knowledge of depth has made it possible also to nia know our position.” ik Whate Ansda | Captain N. Johnsen, Master of ¢. s. Columb North German Lloyd S. S. Company Modern depth sounding as accomplished by the E dehouiotee — means thousands of accurate soundings shown visually ee ames 1 the wheel-house at a touch of the hand. | Submarine Signal Corporation _ 160 State Street, Boston, Massachtsctic t

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