Basic Details Surname Roberts Forenames Vivian W L Gender Male Information stated on memorial War Military Service Served or died Died Primary Service As stated on memorial Unit (Primary - Stated) HM Submarine A1 Rank / Title (Primary - Stated) PO 1st Class Our References Service (Primary - Our reference) Royal Navy Unit (Primary - Our reference) HMS A1 Rank / Title (Primary - Our reference) Petty Officer 1st Class Death and Burial details Country of death English Channel Year of death 1904 Month of death March Day of death 18 Manner of death as stated Lost life after collision off Nab Light Vessel