Action of 15 August 1917

Action of 15 August 1917
Part of World War I
Date15 August 1917
Location52°57′00″N 2°25′00″E / 52.950000°N 2.416670°E / 52.950000; 2.416670
Result Two British ships sunk
Belligerents
 Royal Navy  Imperial German Navy
Commanders and leaders
Thomas Crisp 
William “Johnsey” Manning (MIA)
(possibly Kpt. Karsten von Heydebreck)
Strength
2 armed smacks 1 U-boat (possibly SM UC-63)
Casualties and losses
1 killed,
7 missing
2 ships sunk
unknown

The action of 15 August 1917 was a naval engagement which occurred during the First World War. The action was fought between a German U-boat (believed to be SM UC-63) and two naval trawlers, Nelson and Ethel & Millie, in the North Sea.