Basic Details Surname Traill Forenames David Gender Male Information stated on memorial War First World War (1914-1918) Served or died Served Primary Service As stated on memorial Unit (Primary - Stated) R.N.V.R. (Secret Service) Rank / Title (Primary - Stated) Petty Officer, Hydrophone-Instructor Our References Service (Primary - Our reference) Royal Navy Unit (Primary - Our reference) Royal Naval Volunteer Reserve Rank / Title (Primary - Our reference) Petty Officer