A fifth Register of Seamen was compiled for this period, comprising seamen's pouches and docket books.

The docket books (BT 382) contain place and date of birth, discharge book (Dis.A.) number, rank or rating (with certificate numbers for officers), other qualifications, a list of ships with date and place of engagement, F or H (for Foreign or Home trade voyage), date and place of discharge and character.

Supplementary documents were placed in the seamen's pouches (BT 372), some of which may include details dating back to 1913. These documents are searchable by surname using the Catalogue.

Merchant seamen: Registers of service 1913-1972

Merchant seamen: Medals and honours

For a fee of £3.50 you can access records of World War Two Medals (BT 395 ) claimed and issued to more than 100,000 Merchant Seamen from 1946 to 2002 in DocumentsOnline.

My Ancestor was a Merchant Seaman, Second Edition, Christopher T. Watts and Michael J. Watts (Society of Genealogists)