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Shelves of wood or concrete are fitted below the embrasures in the principal direction. A specific sub-type of the section post is the Seagull trench named for its W-shaped plan view like a seagull's wings. These are predominantly found at airfields. 21 examples of the Seagull trench and 26 examples of Section posts remain extant. [66] [67]
A British soldier on a beach in Southern England, 7 October 1940. Detail from a pillbox embrasure.. British anti-invasion preparations of the Second World War entailed a large-scale division of military and civilian mobilisation in response to the threat of invasion (Operation Sea Lion) by German armed forces in 1940 and 1941.
In British and Canadian military argot it equates to a range of terms including slit trench, or fire trench (a trench deep enough for a soldier to stand in), a sangar (sandbagged fire position above ground) or shell scrape (a shallow depression that affords protection in the prone position), or simply—but less accurately—as a "trench".
A pillbox is a type of blockhouse, or concrete dug-in guard-post, often camouflaged, normally equipped with loopholes through which defenders can fire weapons. It is in effect a trench firing step, hardened to protect against small-arms fire and grenades, and raised to improve the field of fire.
The Ruck machine gun post or Ruck pillbox is a type of hardened field fortification built in Britain during the invasion crisis of 1940–1941. It was designed by James Ruck and was made from prefabricated concrete sections and paving slabs , sandbags and rammed earth .
The Tett turret is a type of hardened field fortification built in Britain during the invasion crisis of 1940–1941. [1] It was a small circular pillbox named after its inventor H.L. Tett and manufactured as a private commercial venture by Burbridge Builders Ltd of Surrey.
[3] [4] The exit may be via an open roof, through a hatch in the roof [5] or through a low entrance cut into the pipe to a slit trench. Norcon was not the only company to design a defence made from pipes. A similar design was the Croft pillbox developed by the Croft Granite, Brick and Concrete Company. [6]
Russian anti-tank obstacles near the horizon, Kherson Oblast, May 2022. Dragon's teeth on the left, Czech hedgehogs on the right In Belgorod Oblast, defensive lines of dragon's teeth were constructed in October 2022 under the supervision of the Wagner Group along the Russia–Ukraine border, intended as a second line of defense alongside trenches and a trained militia in the event the ...