Basic Details Surname Cockburn Forenames Alexander Gender Male Information stated on memorial War Second World War (1939-1945) Served or died Died Primary Service As stated on memorial Unit (Primary - Stated) ROYAL NAVY Sub-unit (Primary - Stated) H. M. Submarine "SEAHORSE" Rank / Title (Primary - Stated) Warrant Engineer Our References Service (Primary - Our reference) Royal Navy Unit (Primary - Our reference) The Honourable Artillery Company Death and Burial details Country of death At sea Town of death Heligoland Bight Year of death 1940 Month of death January Day of death 1 Age at death 35 Manner of death as stated Lost at sea, Heligoland Bight, between 1st and 5th January 1940 Manner of death reference Killed in Action