This series contains indexes to the Registrar General of Shipping and Seamen's registers of cooks' certificates of competency and service. The volumes show surname, Christian name, [forename], year of birth, place of birth, discharge 'A' number - infrequently quoted, certificate number and occasional remarks. The indexes are split over two volumes the first covering Surnames with the initial letter A to L and the second M to Z.
The actual Registers of Cooks' Certificates of Competency and Service, are held at the National Maritime Museum, Greenwich.
RSS/CO/1, 1915-1922 5001-10000
RSS/CO/2, 1922-1930 10001-15000
RSS/CO/3, 1930-1940 150001-19760
RSS/CO/4, 1940-1944 19761-24935
RSS/CO/5, 1951-1955 30906-31094
RSS/CO/6, 1949-1958 35000-41021
If you do not know the Certificate Number you are advised to check these indexes before visiting the National Maritime Museum.