Basic Details Surname Casson Forenames R J Gender Male Information stated on memorial War Military Service Served or died Died Primary Service As stated on memorial Service (Primary - Stated) HM Submarine Service Unit (Primary - Stated) D6 Rank / Title (Primary - Stated) AB Our References Service (Primary - Our reference) Royal Navy Unit (Primary - Our reference) HMS D6 Rank / Title (Primary - Our reference) Able Seaman Death and Burial details Year of death 1918 Month of death June Day of death 28 Manner of death as stated Lost their lives in Submarines or on Submarine Service