Radio navigational aids : marine direction-finding stations, radiobeacons, time signals, navigational warnings, distress signals, medical advice and quarantine, Loran, weather, and radio regulations for territorial waters

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Radio navigational aids : marine direction-finding stations, radiobeacons, time signals, navigational warnings, distress signals, medical advice and quarantine, Loran, weather, and radio regulations for territorial waters

issued by the Hydrographic Office under the (authority of the Secretary of the Navy)

（H.O. pub., no. 205）

U.S. Govt. Print. Off., 1947

  • 1947

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Many parts are leaves

Includes index

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