Admiralty Compass Observatory, 1842-1971

Installation Specification for Mark 23 Modulations C2 and C1, ACO publication, text and diagrams.

Record Details

Item reference: ACO/S&T/24/4
Catalogue Section: Public records: records of the central administration of the Royal Navy and the Merchant Navy
Level: ITEM
Date made: 1966 - 1966; 1966
Creator: Admiralty Compass Observatory
Credit: © Crown copyright. National Maritime Museum, Greenwich, London
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