HMS K4, British steam-powered submarine near Isle of May, Scotland
The K4 submarine measured 339 feet in length and carried eight torpedo tubes, four positioned at the bow and four along its beam.
The submarine perished with all hands during the Battle of May Island in 1918 when multiple naval vessels collided in misty conditions.
The K4 represents British naval engineering from World War I, when the Royal Navy developed steam-powered submarines for fleet operations.
The vessel remains at coordinates 56.25°N, 2.183333°W, where marine researchers conduct studies of World War I naval archaeological sites.
Sonar images from a 2011 wind farm survey revealed the wreck location, providing new data about this steam-powered submarine's final position.
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