2026-04-05T18:36:08+01:0012,43717415https://marinefinds.org.uk/datalabs/terminology/objects/format/jsonhttps://marinefinds.org.uk/datalabs/terminology/objects/format/xmlhttps://marinefinds.org.uk/datalabs/terminology/objects11340160345ANTI LANDING TRENCHYA purpose built trench designed to prevent the successful landing of enemy glider-borne and airborne forces.1P11387160396ANTI MOTOR TORPEDO BOAT BATTERYYA coastal battery containing one or more artillery pieces for to defend the coast against hostile motor torpedo boats.1P10744143173ANTI SEAPLANE OBSTACLEYSubmerged obstacles to stop the landing of Seaplanes1P10769143368ANTI SUBMARINE DEFENCEYSecond World War defence work usually consisting of securinng points for a boom defence, associated gun, and searchlight, emplacements1P10094107993Anti Submarine Searchlight BatteryN1N2157100263ANTI SUBMARINE VESSELYA small warship (often adapted from a trawler or drifter) used to hunt enemy submarines.143P689491052ANTI TANK BLOCKYA reinforced concrete block designed to obstruct the progress of a tank or armoured vehicle. Use more specific type where known.1P11292160296ANTI TANK BUOYYBlocks of solid concrete, in the shape of a round bottomed cone usually 2 feet 6 inches across x 2 feet 9 inches high. Buoys were mainly used in road blocks intended to impede enemy movement in the event of invasion.1P11293160298ANTI TANK CALTROPYBlocks of concrete with four protruding arms so that, whichever way up the caltrop is placed, one arm will always point upward. Used in imitation of the iron caltrops thrown on the ground to impede cavalry.1P11295160300ANTI TANK COFFINYRectangular slabs of concrete with a sloping top usually with sides of 5 feet by 3 feet and 3 feet high which when placed in rows were intended to form a substantial barrier to enemy armoured divisions in the event of invasion.1P11305160310ANTI TANK CONEYCones of solid concrete usually 3 feet 6 inches in diameter x 2 feet high which, when placed in rows or groups were intended to form a substantial barrier to enemy armoured divisions in the event of invasion.1P11296160301ANTI TANK CUBEYCubes of solid concrete, usually with sides of 3 feet 6 inches or 5 feet which when placed in rows were intended to form a substantial barrier to enemy armoured divisions in the event of invasion.1P11298160303ANTI TANK CYLINDERYBlocks of solid concrete, in the form of cylinders usually 2 feet across x 2 feet 6 inches or 3 feet high. Cylinders were mainly used in road blocks intended to impede enemy movement in the event of invasion.1P10643141942ANTI TANK DITCHYStop-line against invading tanks in form of a ditch during the defence of Britain.1P11313160318ANTI TANK DITCH (ARTIFICIAL)YA man made ditch designed to obstruct the progress of a tank or armoured vehicle. Ditches were often reveted with concrete or wood.1P11314160319ANTI TANK DITCH (NATURAL IMPROVED)YA natural ditch the depth and/or width of which has been increased so as to prevent the progress of a tank or armoured vehicle.1P11311160316ANTI TANK GIRDERYA metal girder, usually of iron or steel, embedded in the ground designed to obstruct the progress of hostile tanks or armoured vehicles.1P10554140527ANTI TANK GUN EMPLACEMENTYA defensive structure or site where an anti-tank gun is emplaced.1P11468162562ANTI TANK GUNNERY RANGEYAn area of ground on which anti tank guns can be placed for testing purposes and to practice firing at targets.1P11312160317ANTI TANK HAIRPINYA road block formed by placing curved rails, "hairpins", in sockets in the road surface.1P11469162563ANTI TANK ISLANDYA designated area within a town or village with fixed defences such as pillboxes, anti tank ditches and gun emplacements, designed to threaten the flanks of an enemy force which had broken through a stop line.1P10650141949ANTI TANK OBSTACLEYObstacles like concrete cubes, cylinders or pimples erected in the defence of Britain.1P11300160305ANTI TANK PIMPLEYBlocks of solid concrete,in the form of truncated pyramids usually 3 feet square x 2 feet high which could be placed in rows to impede enemy movement in the event of invasion. Pimples were recommended for use on soft ground.1P11315160320ANTI TANK SCAFFOLDINGYScaffolding intended to impede the advance of enemy armoured divisions. Often found in association with "one way" anti tank ditches.1P11304160309ANTI TANK TETRAHEDRONYTriangular concrete pyramids with 6 feet long sides and 5 feet high, intended to impede enemy movement in the event of invasion. Thought to be confined geogaphically to Southern Command.1P11471162565Anti Tank TrapN1N11472162566Anti Tank TrenchN1N11316160321ANTI TANK VERTICAL RAILYA road block formed by placing rails or girders in an upright position in sockets in the road surface, forming a moveable barrier.1P978194378ANTI TANK WALLYA wall, usually of reinforced concrete, designed to obstruct the progress of a tank or armoured vehicle1P11470162564ANTI TANK WALL (ASSAULT TRAINING)YAn anti tank wall constructed specifically to be used for training purposes.1P