Basic Details Surname Gardner Forenames H R 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) D3 Rank / Title (Primary - Stated) ERA Our References Service (Primary - Our reference) Royal Navy Unit (Primary - Our reference) HMS D3 Rank / Title (Primary - Our reference) Engine Room Artificer Death and Burial details Year of death 1918 Month of death March Day of death 15 Manner of death as stated Lost their lives in Submarines or on Submarine Service