HMS K4

HMS "K4" was a British K-class submarine built by Vickers in Barrow-in-Furness. She was laid down on 28 June 1915 and commissioned on 1 January 1917, one year before the end of World War I.
Accidents.
January 1917.
In January 1917 HMS K4 ran aground on Walney Island. The British submarine giant was stranded on its beach but was undamaged. She was refloated the next day. 
17 November 1917.
On 17 November 1917, "K4" collided with sister ship during an accident off the Danish coast. The light cruiser operating with "K1" had to make a sharp turn to avoid three units from the 4th Cruiser Squadron. And in the confusion, "K4" collided with "K1". The crew of "K1" were rescued and "K1" sunk by the "Blonde".
Loss.
"K4" was lost on 31 January 1918 during the night time fleet exercises later known as the Battle of May Island (Operation E.C.1) when she was attached to the 13th Submarine Flotilla. While attempting to avoid a collision with , she became the victim of collisions with and . She was lost with all hands. The wreck is designated as a "protected place" under the Protection of Military Remains Act 1986.
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