The North Sea Mine Barrage, also known as the Northern Barrage, was a large minefield laid easterly from the Orkney Islands to Norway by the United States Navy during the First World War. The objectiv
A Mk 6 mine atop its anchor. Two horn fuzes are visible, but the antenna fuze cannot be seen in this image.
Only the two smallest of the eight steamships converted to lay the barrage remained in commission for conventional minelaying operations. USS Shawmut, shown laying the North Sea mine barrage, sank 23 years later during the attack on Pearl Harbor after being renamed Oglala.
USS Eider (Minesweeper No. 17) (left) in port with submarine chasers alongside during the clearance of the North Sea Mine Barrage in 1919. The leftmost submarine chaser is either SC-254, SC-256 or SC-259 and the others are (left to right) SC-45, SC-356, SC-47, and SC-40.
The Otranto Barrage was an Allied naval blockade of the Strait of Otranto between Brindisi in Italy and Corfu on the Greek side of the Adriatic Sea in the First World War. The operation consisted of o
North Sea Mine Barrage
…when the Swedish steamship Hollander sank, minutes after striking a mine in October; and the steamer Kerwood struck a mine and sank on 1 December. Otranto Barrage Armstrong, Harry C. (1988). "The Removal of the North Sea Mine Barrage". Warship International. XXV (2): 134–169. ISSN 0043-0374…
British drifters sailing from their base in the Adriatic to man the Otranto Barrage
The damaged Austro-Hungarian cruiser Novara after the battle of the Otranto Straits, 15 May 1917