SV Marion Lightbody was a Russian full-rigged ship that was torpedoed by the Imperial German submarine U-20 in the Atlantic Ocean near the Fastnet Rock on 8 July 1915 while she was travelling from Valparaíso, Chile to Queenstown, Ireland while carrying a cargo of barley.^[1]

Marion Lightbody was launched on 17 April 1888 and completed the same year at the Henderson D. & W. & Co. Ltd. shipyard in Meadowside, United Kingdom. The ship was 88 metres (288 ft 9 in) long, had a beam of 13 metres (42 ft 8 in) and had a depth of 7.3 metres (23 ft 11 in). She was assessed at 2,242 gross register tons (GRT) and had four masts.^[2]

Marion Lightbody was travelling from Valparaíso, Chile to Queenstown, Ireland while carrying a cargo of barley when on 8 July 1915, she was torpedoed by the Imperial German submarine U-20 in the Atlantic Ocean near the Fastnet Rock, just over a month after the same submarine had infamously torpedoed and sunk the RMS Lusitania in the same vicinity. The 25 crewmen escaped the ship in a dinghy and were later picked up by a British patrol boat before being brought to Queenstown.^[3]

The wreck of Marion Lightbody lies at (50°53′N 08°48′W / 50.883°N 8.800°W / 50.883; -8.800).^[4]

• 
  SV Marion Lightbody in harbour.
• 
  SV Marion Lightbody at wharf.
• 
  SV Marion Lightbody in an unknown port.
• 
  A Painting of SV Marion Lightbody at sea by Thomas G. Purvis