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Series consists of Canadian Naval Mission Overseas (CNMO) and British Admiralty secret signal series during the Second World War, as well as Canadian Forces Headquarters (CFHQ) CANGENS for 1962-1966. The CMNO signal series included CANOPS, CANMO and CRYSTAL BALL. Whereas CANOPS reported on operational and other movements of HMC ships operated by the British Admiralty during 1944-1945, CANMO reported on general information regarding Operations OVERLORD (code name for the Allied landing on the coast of Normandy on D-Day, 6 June 1944) and NEPTUNE (title given to the actual landing phase of Operation OVERLORD) during 1944-1945. CRYSTAL BALL was concerned with the present and future movements of Canadian ships in 1945. The British Admiralty signal series included NATEL, OPTEL and STRATREP, and they reported information on operation in all theatres during 1943-1945.

Fonds consists of a volume entitled “Manual of Seamanship, Volume One” (BR 67) originally published in 1937 and reproduced in Canada in 1942. Admiralty printed books and pamphlets issued to the Navy in the BR (Books of Reference) series, which did not need inclusion in the security classified CB or SP series. They include regulations and instructions, handbooks and training manuals, reports and works of reference. The manual details marine life, giving information on naval routines, navigation, various parts of a ship and how to go about working with said parts, life saving, provisions and signals.