File:Tnm 12 1 39-52.pdf

Revision as of 09:59, 5 March 2020 by Bleridon (talk | contribs) (This article describes the first tests of sonar made by Langevin during world war I and how "Langevin's invention was by far the most effective device developed during the war for the hunting of submarines".)
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Summary

This article describes the first tests of sonar made by Langevin during world war I and how "Langevin's invention was by far the most effective device developed during the war for the hunting of submarines".

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current09:59, 5 March 2020 (391 KB)Bleridon (talk | contribs)This article describes the first tests of sonar made by Langevin during world war I and how "Langevin's invention was by far the most effective device developed during the war for the hunting of submarines".
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