This series contains correspondence and other papers of the Marine Survey Service and the Consultative Marine Branch of the Board of Trade and its successors relating to survey and inspection of ships, engines, boilers, wireless, etc., in the interest of safety. Some files contain plans of ships.
Until 1922, the technical papers dealing with survey work were registered in the Marine Department's comprehensive series (M. Files).
Selected records within this series are available to download as digital microfilm.
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