Some records of births, marriages and deaths at sea from 1831 to 1958 are included in the Miscellaneous Foreign Returns in RG 32 (indexed by RG 43).

An official registration system operated from 1851, and the registers created by this system are available in the returns made to the Registrar General of Shipping and Seamen - see BT 158, BT 159, BT 160, BT 334 and BT 341

These are held by The National Archives, and should cover all the events that were later transmitted to the various General Register Offices of England, Scotland and Ireland.