RMS Leinster

RMS Leinster

During World War I:

• one 12 pounder gun
• two signal guns

RMS Leinster was a vessel operated by the City of Dublin Steam Packet Company, served as the Kingstown (now Dún Laoghaire)-Holyhead mailboat until she was torpedoed and sunk by German submarine UB-123 on 10 October 1918, while bound for Holyhead. She went down just outside Dublin Bay at a point four miles (6 km) east of the Kish light. Over 500 people perished in the sinking — the greatest single loss of life in the Irish Sea.

The official death toll was 501. However, research by Roy Stokes, author of Death in the Irish Sea: The Sinking of RMS Leinster and fellow writer Philip Lecane, author of Torpedoed! The RMS Leinster Disaster, suggests the actual total was higher.