D/JX 126466 is his Official Number where D represents his Port Division as Devonport. Other common ones are C for Chatham, P for Portsmouth and L for Lee-on-Solent (Fleet Air Arm). JX indicates he belongs to the Seaman or Communications Branch. HMS Prince of Wales crew - S T U Tim Edited to add: Going back over this thread I see TD has A/PO Tucker listed at Post 12 with info from RN Casualty Lists as ex-HMS Repulse. This is incorrect. CWGC lists him as dying 14 Feb 42 (one day before Singapore surrendered). Casualty HMS Sultan was the Singapore Naval Base and was where many of the survivors of the sinking of the Prince of Wales and Repulse were taken.