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Author Topic: Glossary of Terms - Military and Fortifications  (Read 10156 times)

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Offline cptpies

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Re: Glossary of Terms - Military and Fortifications
« Reply #5 on: December 05, 2011, 13:26:05 »
These are an adaptation of the English heritage thesaurus of defence sites which I use in my DoB overlay.

25 Yard Small Arms Range  -  A small arms range built at most airfields for ground crew to practice with small arms for airfield defence

AA SEARCHLIGHT  -  Usually a circular pit with a low encircling mound for the projector, an AALMG pit and associated accomodation for the crew.

AIR RAID SHELTER  -  A fortified structure used to protect civilians and/or military personnel from enemy bombing.

AIRCRAFT DISPERSAL PEN (TYPE 11070/40)  -  An early design of dispersal pen designed to protect two aircraft. Made of banked earth it has a shelter at the end of the central arm.

AIRCRAFT DISPERSAL PEN (TYPE A)  -  An early design of dispersal pen designed to protect two aircraft. Made of banked earth it has a distinctive E shape.

AIRCRAFT DISPERSAL PEN (TYPE B)  -  A later design of dispersal pen designed to protect two aircraft. Its curved outer arms are similar to the type 11070/40 but the shelters are in located at the back of the pen in the outer arms.

Airfield Bombing Decoy (Q and K sites)  -  Airfield decoy sites. Q sites were daytime decoys imcorporating dummy landing strips and aircraft. K sites were night time decoys incorporating dummy runway lights and moving lights to simulate taxiing aircraft.

AIRFIELD DEFENCE SITE  -  A miscellaneous defence site. Can refer to defended shelters, gun pits, trenches etc.

ALLAN WILLIAMS TURRET  -  A transportable two man pillbox consisting of a steel dome on a roller ring to traverse it usually positioned over a trench. The dome has a front hatch and a circular roof hatch to allow the turret to be employed in both an AA and ground defence role. Often found close to airfields or important military sites.

AMMUNITION STORE  -  An building or installation used for the storage of ammunition.

ANTI BOAT LANDING OBSTACLE  -  Obstacles, including scaffolding and anti tank blocks designed to impede an enemy's attempts to land forces onto open beaches.

ANTI INVASION DEFENCE SITE  -  Sites, buildings and structures associated with the defence of the British Isles against invasion from seaborne or airborne forces.

ANTI LANDING OBSTACLE  -  Obstacles placed in open spaces and alongside roads designed to prevent the successful landing of enemy airborne forces.

ANTI LANDING POLE  -  Metal or wooden posts emplaced on open ground to prevent glider or light aircraft landings.

ANTI LANDING TRENCH  -  Trenches and banks dug in open ground to prevent glider or light aircraft landings.

ANTI SEAPLANE OBSTACLE  -  Cables or other obstructions such as moored craft on open stretches of water to prevent seaplane landings.

ANTI TANK BLOCK  -  A cuboid concrete block usually about 3 ft square. Normally emplaced in groups spaced about 3ft apart to block beaches or key access points. Sometimes have a metal loop in the top to string a metal cable through.

ANTI TANK BUOY  -  A portable cone shaped concrete obstacle with a rounded base to allow it to be rolled into position with others of its kind to form a hasty roadblock. They often have a hole in the top to insert a wooden or metal pole to assist in rolling.

ANTI TANK COFFIN  -  The drawing for a Coffin shows an elongated concrete three sided pyramid. No obstacles of this type have been found but the term is applied to large concrete blocks about 6ft high and 3ft wide with a sloping back face, generally only found in Sussex.

ANTI TANK CONE  -  A concrete cone shaped obstacle generally about 2ft high with a flat base. Often have a metal ring in the top for threading a metal cable or chain. These could be rolled into place to form a hasty roadblock.

ANTI TANK CYLINDER  -  Cylinders are concrete obstacles coming in two types. Small portable ones of a about 2ft height that can be rolled into place to form a hasty roadblock or large permanent ones constructed of a concrete sewer pipe filled with concrete. These are often found at canal bridges on the Kennet and Avon and elsewhere.

ANTI TANK DITCH  -  A man made ditch and bank with a V shaped profile offereing an impassable obstacle to tanks.

ANTI TANK DITCH (NATURAL IMPROVED)  -  A natural watercourse whose banks have been modified to be more of an obstacle to tanks.

ANTI TANK GUN EMPLACEMENT  -  A concrete emplacement of indeterminate type for an anti tank weapon.

ANTI TANK GUN POSITION  -  A temporary position for an anti tank weapon.

ANTI TANK HAIRPIN  -  A moveable anti tank obstacle consisting of bent steel rails with a vertical front face and sloping back face.The vertical was slotted into sockets in the road. These are sometimes permanent features.

ANTI TANK HORIZONTAL RAIL  -  An anti tank obstacle consisting of concrete blocks situated either side of a road with sockets to slot lengths of steel rail into to present a horizontal barrier.

ANTI TANK ISLAND  -  A town or village at a key road network hub given defences and obstacles to prevent tanks from passing through.

ANTI TANK OBSTACLE  -  An unspecified anti tank obstacle.

ANTI TANK PIMPLE  -  A four sided flat based concrete pyramid individually known as a tetrahedron but normally emplaced in rows at least three deep along beaches and across key access points.

ANTI TANK SCAFFOLDING  -  An obstacle emplaced on suspected invasion beaches consisting of scaffolding poles clamped together to form a continuous obstacle to tanks and landing craft.

ANTI TANK TETRAHEDRON  -  A triangular based 3 faced pyramid obstacle.

ANTI TANK VERTICAL RAIL  -  A moveable obstacle consisiting of lenghts of steel rail that could be slotted vertically into permanent sockets emplaced in the road way.

ANTI TANK WALL  -  A thick continuous concrete wall sometimes with small openings to allow pedestrian access. Usually found on beaches but sometimes along rail lines.

ANTI TANK WALL (ASSAULT TRAINING)  -  A concrete wall especially constucted to practice obstacle demolition in preparation for the Normandy landings.

ARMY BATTLE HEADQUARTERS  -  A building used for the administration of an army during battle.

Army Bombing Decoy (A Series)  -  Bombing decoy for an army site.

Assault Bombing Decoy  -  Bombing decoy sited to protect concentrations of troops and supplies in preparation for the Normandy landings.

AUXILIARY UNIT BOMB STORE  -  A structure, usually well concealed, used to store explosives intended for use by the Auxiliary Units (or British Resistance Organization) in the event of an invasion.

AUXILIARY UNIT OBSERVATION POST  -  An observation post, usually well concealed, intended for use by the Auxiliary Units (or British Resistance Organisation) in the event of an invasion to watch enemy movements without being seen.

AUXILIARY UNIT OPERATIONAL BASE  -  A well concealed structure, usually constructed undergound, intended for use by members of the British Resistance Organization in the event of invasion.

AUXILIARY UNIT SITE  -  A site intended for use by the Auxiliary Units (or British Resistance Organisation) in the event of an invasion.

AUXILIARY UNIT SPECIAL DUTIES CONTROL STATION  -  A site intended for use by the Auxiliary Units (or British Resistance Organisation) in the event of an invasion.

AUXILIARY UNIT SPECIAL DUTIES OUTSTATION  -  An underground hideout containing radio equipment to be used by the Special Duties sections of the Auxiliary Units to send information to the control station for relaying to headquarters.

AUXILIARY UNIT SPECIAL DUTIES ZERO STATION  -  A site intended for use by the Auxiliary Units (or British Resistance Organisation) in the event of an invasion.

BARBED WIRE ENTANGLEMENT  -  One or more coils of barbed wire intended to impede the advance of hostile troops.

BARRAGE BALLOON SITE  -  A site where a single large balloon was attached by fine wire cables to the ground to form an aerial obstruction to attacking enemy aircraft.

BARREL FLAME TRAP  -  An anti-personnel device consisting of a 40 gallon fuel drum placed on top of an explosive charge and detonator. When detonated the barrel would explode sending burning fuel over the intended target.

BATTERY ENGINE HOUSE  -  A purpose built structure to house a generator for powering an artillery battery.

BATTLE HEADQUARTERS  -  A structure designed to be the headquarters for the coordination of an airfield's defences. Constructed on the surface or partially underground it was only intended to be occupied during an attack

BATTLE HEADQUARTERS (11008/41)  -  A structure designed to be the headquarters for the coordination of an airfield's defences. Constructed on the surface or partially underground it was only intended to be occupied during an attack

BEACH DEFENCE BATTERY  -  A battery, usually a single gun often in a pillbox, situated so as to provide enfilading fire along a beach to prevent hostile forces from advancing inland.

BEACH DEFENCE LIGHT  -  A searchlight battery used to light a beach.

BEACH SCAFFOLDING  -  An obstacle emplaced on suspected invasion beaches consisting of scaffolding poles clamped together to form a continuous obstacle to tanks and landing craft.

BLAST SHELTER  -  A roofless shelter for 50 men to protect against blast effects. Also desgined to be an Ad Hoc fighting position for airfield defence.

BOOM DEFENCE  -  A bar, chain or other obstruction stretched across a waterway to obstruct navigation.

BUNKER  -  A bomb-proof structure, usually undergound, used as a command centre for military operations.

CABLE  -  A cable, usually erected between posts, used to prevent the landing or hostile aircraft.

CANADIAN PIPE MINE  -  A steel pipe buried into the ground and packed with explosives. They were intended to be detonated on the approach of a hostile amroured vehicle or tank in order to create an obstacle directly in its path.

CASL  -  Searchlight battery, which faces out to sea, used to locate and illuminate enemy shipping.

CENTRE OF RESISTANCE  -  An area, often a village, with fixed defences such as pillboxes, anti tank ditches and gun emplacements. Designed to stop the advance of an enemy force and to hold out for an agreed period of time.

CHAIN HOME EXTRA LOW STATION  -  A radar station with sets operating on a wavelength of about 15cm. Chain Home Extra Low Stations were intended for use in locating low-flying aircraft and ships but were also capable of detecting high-flying aircraft.

CHAIN HOME LOW STATION  -  A radar station with sets operating on a wavelength of 1.5m. Chain Home Low Stations were intended for use in locating low-flying aircraft and ships but were also capable of detecting high-flying aircraft.

CHAIN HOME STATION  -  A radar station using equipment based upon apparatus developed for ionospheric research. Chain Home was the backbone of British radar provision in the Second World War.

CHECKPOINT  -  A roadblock, usually manned by the Home Guard, where the credentials of civilians and military personnel where checked before allowing them to proceed.

Civil Bombing Decoy (C Series)  -  A bombing decoy sited to protect a city or important civil traget such as a rail yard or dock.

CIVIL DEFENCE SITE  -  Sites and buildings used in the coordination of the defence of the civilian population during times of war. Could also be used during times of national emergency.

COAST ARTILLERY BATTERY  -  A defensive battery positioned facing out to sea enabling the guns to be brought to bear on enemy shipping and amphibious craft.

COAST ARTILLERY BATTERY COMMAND POST  -   command post used to direct the guns of a coastal battery.

COAST ARTILLERY BATTERY OBSERVATION POST  -  A building used to observe the movements of hostile aircraft or shipping.

COAST ARTILLERY SEARCHLIGHT  -  Searchlight battery which faces out to sea, used to locate and illuminate enemy shipping.

COAST DEFENCE RADAR TOWER  -  A steel tower mounting a coast defence radar.

COASTAL DEFENCE SITE  -  A defence site used to defend against emeny shipping or invasion attempts.

COASTAL OBSERVATION POST  -  A building situated on the coast used for observing the movements of shipping.

COMMAND POST  -  A building used for directing the movements of artillery pieces or searchlights.

DEEP SHELTER  -  Shelter associated with artillery batteries

DEFENCE POST  -  Sites, buildings and structures involved in the passive or active defence of the country against hostile forces on land, sea and in the air. 

DEFENCE SITE  -  Sites, buildings and structures involved in the passive or active defence of the country against hostile forces on land, sea and in the air.

DEFENCE WORK  -  Sites, buildings and structures involved in the passive or active defence of the country against hostile forces on land, sea and in the air. 

DEFENDED BUILDING  -  A building which has been altered to increase its defensive characteristics.

DEFENDED LOCALITY  -  An area, with fixed defences, designed to act as a focal point for a defending force.

DEPTH CHARGE CRATER  -  A demolition site consisting of a buried depth charge to be detonated on invasion to crater a road.

DETONATION CHAMBER  -  A chamber built into a structure, such as a bridge, in which an explosive demolition charge could be placed. The charge could then be inserted in the event of an invasion.

DETONATION CHARGE SITE  -  A chamber built into a structure, such as a bridge, in which an explosive demolition charge could be placed. The charge could then be inserted in the event of an invasion.

DRILL HALL  -  A building or site used for the exercise and training of military personnel.

EMBARKATION HARD  -  Special concrete loading ramps nicknamed 'hards' had been constructed along river bank, beaches and inlets to enable orgainised embarkation onto various types of landing craft to take place irrespective of tides.

EMERGENCY COAST ARTILLERY BATTERY  -  A coastal battery constructed at short notice usually mounting a variety of artillery pieces.

EXTENDED DEFENCE OFFICERS POST  -  An observation post for a naval officer in charge of a marine minefield.

Factory Bombing Decoy (M series)  -  A bombing decoy sited to protect a factory or industrial area.

FIELD GUN EMPLACEMENT  -  A concrete emplacement designed to house a field artillery weapon.

FIRE TRENCH  -  A trench or firing position constructed from or lined with bricks or concrete.

FLAME BARRAGE PUMP HOUSE  -  Small concrete structure housing pumps for a flame fougasse or barrage.

FLAME FOUGASSE  -  A trench or pipe system constucted to pump ignited fuel onto a beach or road.

FUEL STORAGE SITE  -  A building used for the storage of materials used to provide power or heat.

GUN EMPLACEMENT  -  Generic site term for unidentified weapon emplacements.

Gun Testing Butts  -  Used for test firing aircraft weapons.

HAA BATTERY  -  An anti aircraft battery usually mounting weapons with a larger calibre ammunition such as the QF 3.75 inch (94mm) gun.

HOLDFAST  -  A plinth or pedestal, usually of concrete, to which an anti aircraft or coastal battery gun was fitted. Holdfasts are often the only evidence for a weapon which survive.

HOME GUARD SHELTER  -  A structure, often concrete or brick,  used as a shelter by members of the British citizen army during watch or patrol duties, or air raids in wartime.

HOME GUARD STORE  -  Place for the Home Guard to store equipment and ammunition, either structural or subterranean during the defence of Britain.

INFANTRY POST  -  A defensive position, often constructed from sandbags, designed to protect a group of infantry.

KEEP  -  An existing building which has been designated as the last point of defence in a defended locality, nodal point or centre of resistance. If all else failed the keep would be used as a last ditch defences.

LAA BATTERY  -  An anti aircraft battery usually mounting weapons with a small calibre  such as the 40mm Bofors or Lewis machinegun.

LOOPHOLED WALL  -  A wall containing apertures to allow a weapon to be fired through it.

LYON LIGHT EMPLACEMENT  -  An emplacement mounting a small, portable electrically-powered searchlight.

MACHINE GUN EMPLACEMENT  -  A structure, usually or concrete or sandbags, in which a machine gun was emplaced.

MACHINE GUN POST  -  An open walled structure built of concrete, brick or sandbags which enclosed one or more machine-guns mounted on pintels for light anti-aircraft and ground defence.

MAGAZINE  -  A building in which a supply of arms, ammunition and provisions for an army is stored.

MINED BRIDGE  -  A bridge which has had mines placed within its structure to enable it to be destroyed in the event of an invasion.

MINEFIELD  -  An area of ground or water containing explosive mines.

MINEFIELD CONTROL TOWER  -  An enlarged XDO post, only three are known to exist.

MINEWATCHERS POST  -  A building with small observation ports used for plotting mines dropped by parachute.

Naval Bombing Decoy (N Series)  -  A Bombing decoy sited to protect naval sites.

Naval Coast Bombing decoy (NC Series)  -  A Bombing decoy sited to protect naval sites.

NODAL POINT  -  A designated area, usually sited at a strategic crossroads, with fixed defences such as pillboxes, anti tank ditches and gun emplacements, designed to act as a rallying point for defenders.

OBSERVATION BUNKER  -  A building or site for watching specific military activities or the movement of enemy forces.

OBSERVATION POST  -  A building or site for watching specific military activities or the movement of enemy forces.

Oil Terminal Bombing Decoy (P Series)  -  A Bombing decoy sited to protect oil terminal facilities.

ORDNANCE DEPOT  -  A building or site used by the armed forces for the storage and issuing of military stores and materials.

PEDESTAL  -  A concrete, cylindrical pedestal on which a spigot mortar or gun was mounted. The pedestal is often the only evidence for a Spigot Mortar emplacement to survive.

PETROLEUM WARFARE SITE  -  A site, usually including fuel tanks, pipeworks and control buildings, where flaming petroleum was intended to be used as a weapon against a hostile invasion.

PICKETT HAMILTON FORT  -  A sunken, circular, concrete pillbox used on airfields. They remained flush with the surface to permit the free movement of aircraft, but if attack threatened could be raised hydraulically or by a counterbalance and manned to give covering fire.

PILLBOX  -  An often squat building with thick loopholed walls and a flat roof, designed to accommodate a variety of weapons, usually strategically positioned to cover a vulnerable point in a defensive system.

PILLBOX (AIR MINISTRY PATTERN)  -  A pillbox built to a design drawn up by the Air Ministry. Usually found near airfields.

PILLBOX (ASSAULT TRAINING)  -  A pillbox constructed for use in training exercises forming part of a simulated defensive position.

PILLBOX (BEEHIVE)  -  A type unique to Northumberland circular in shape and constructed of concrete filled sandbags

PILLBOX (CANTILEVERED)  -  A pillbox in which the roof is detached from the walls and supported by a central pillar  thus leaving an embrasure allowing a 360 degree field of fire, Also known as a mushroom, FC or Oakington type.

PILLBOX (D TYPE)  -  A type unique to Northumberland D shaped and constructed of concrete.

PILLBOX (DOVER SQUARE) -  A type unique to the Dover area. Square in shape with an overhanginging roof supported on pillars to form large embrasures.

PILLBOX (EARED)  -  A type unique to the east coast consisting of two square machinegun pillboxes merged to form a V shaped pillbox designed for enfilading fire along beaches. The eared reference is to the two forward facing doors looking like ears when viewed from the front.

PILLBOX (EASTERN COMMAND)  -  A type unique to the eastern command line in Essex and Suffolk this large square pillbox has a thick detached blast wall to the rear.

PILLBOX (ESSEX LOZENGE)  -  A type unique to the seawalls of Essex this elongated lozenge shaped pillbox is octagonal and perched on the original seawall with embrasures to both seaward and landward. The seawall heights have since been raised so many of these are now partially buried.

PILLBOX (LINCOLNSHIRE 3 BAY)  -  A type unique to Lincolnshire this variant consists of two type 23 pillboxes merged back to back to create a long rectangular pillbox with a central well for an AA machinegun.

PILLBOX (LOZENGE)  -  A type unique to the northern eastern counties this lozenge shaped pillbox is an elongated hexagon with an entrance to the rear.

PILLBOX (MOWLEM DRUM) -  A type unique to Surrey and a modification of a standard Type 24 pillbox. Constructed by Mowlem this type is a internally the same as a type 24 but externally is circualr creating a very thick walled pillbox sometimes known as a Shellproof.

PILLBOX (PENTAGON)  -  Probably an Air Ministry type as these are only found at airfields. The pillbox is a regular pentagon sometimes with a square well for an AA machinegun at the rear.

PILLBOX (PREFABRICATED)  -  A Type 26 variant constructed of prefabricated concrete panels used as shuttering.

PILLBOX (TYPE 20/2)  -  A type unique to Norfolk similar to an eared pillbox but without the forward facing doors.

PILLBOX (TYPE CP/6/40/111)  -  Also known as a Norcon. A circular pillbox constructed of either prefabricted curved panels or sewer pipe segments. Often has no roof.

PILLBOX (TYPE FW3/22 AA)  -  A type unique to the eastern command line in essex and suffolk this is an enlarged type 22 pillbox with a central well for an AA machinegun, often mistaken for a type 27.

PILLBOX (TYPE FW3/22)  -  A hexagonal pillbox with an internal anti-ricochet wall and loopholes for five Light Machine Guns and one rifle. Originally designed to have walls 15in bulletproof walls many were built with 42in thick shellproof walls. Designed by DFW branch 3.

PILLBOX (TYPE FW3/22CRE)  -  A pillbox built to a design by the commander of the Royal Engineers for the Colchester Garrison. This is an enlarged type 22 pillbox.

PILLBOX (TYPE FW3/23)  -  A rectangular pillbox with an enclosed square plan section for three Light Machine Guns and an adjacent open area housing a mounting for a Light Anti Aircraft weapon. Designed by DFW branch 3.

PILLBOX (TYPE FW3/24)  -  A hexagonal pillbox with an internal anti-ricochet wall and the rear wall lengthened to take two rifle loopholes in addition to five Light Machine Gun loopholes. Both 15in and 42in thick walls are common. Designed by DFW branch 3.

PILLBOX (TYPE FW3/25)  -  A circular pillbox designed by the Engineering and Metals Company using 'Armco' corrugated iron sheets as the inner and outer skins into which concrete was poured  -   giving a 12in wall thickness. The design was taken up by DFW and assigned a drawing number.

PILLBOX (TYPE FW3/26)  -  A square pillbox with loopholes for four Light Machine Guns and walls 18in thick. Probably designed by DFW branch 3 although it may have been adapted from an external source as Southern Command correspondece refer to the type as 'Stent'.

PILLBOX (TYPE FW3/27)  -  A large octagonal pillbox with a projecting entrance equipped with loopholes for eight Light Machine Guns and a Light Anti Aircraft mounting sited in a central well which was accessed from inside the pillbox. Designed by DFW branch 3.

PILLBOX (TYPE FW3/28 TWIN)  -  A square pillbox with walls up to 48in thick designed to emplace a 2 pounder anti tank gun. A large opening in the back allowed the gun to be wheeled into position at the large embrasure in the front wall. Designed by DFW branch 3. The twin type is unique to the Sulham valley and has two large embrasures at right angles rather than one.

PILLBOX (TYPE FW3/28)  -  A square pillbox with walls up to 48in thick designed to emplace a 2 pounder anti tank gun. A large opening in the back allowed the gun to be wheeled into position at the large embrasure in the front wall. Designed by DFW branch 3.

PILLBOX (TYPE FW3/28A)  -  A large rectangular pillbox based on the FW3/28 with the addition of a small infantry chamber to one side of the main gun chamber.

PILLBOX (VARIANT)  -  A pillbox which varies from the standard designs.

PILLBOX (WW1)  -  Usually found in Norfolk WWI pillboxes are either circular and constructed of concrete blocks or a rare type is hexagonal with no internal ricochet wall and similar to a type 22. They often have metal doors rather than a blast wall.

RADAR STATION  -  A building or site incorporating equipment used for detecting the presence of enemy aircraft or ships.

RADIO TELEGRAPHY STATION  -  A building or group of buildings incorporating radio masts built to intercept radio transmissions from enemy vessels and aircraft during WWI.

RAILBLOCK  -  Obstacles, often semi permanent, which are placed on railway lines to prevent the enemy from using them. Set up during the defence of Britain.

REDOUBT  -  An earthwork defence site.

RIFLE PIT  -  A pit dug to protect a small group of infantry men.

ROADBLOCK  -   combination of obstructions used either to stop enemy forces or force them off the road.

ROYAL OBSERVER CORPS SITE  -  A site or structure associated with the activities of the Royal Observer Corps. The Corps was formed on 1 January 1947 and disbanded in 1991.

RUCK MACHINE GUN POST  -  A machine gun post designed by James Ruck constructed from hollow concrete blocks and prefabricated concrete sheeting with loopholes allowing for a garrison of eight.

SEA BARRIER  -  A permanent barrier constructed of posts blocking access to shallow water or easturies.

SEA FORT  -  A fort emplaced offshore to protect shipping

SEAGULL TRENCH  -  A trench in the form of a flattened 'W' with a flat concrete roof covered in turf supported on concrete pillars. The name derives from the resemblance to a child's drawing of a seagull in flight.

SEARCHLIGHT BATTERY  -  A site in which one or more searchlights were positioned to locate enemy aircraft or surface vessels for the benefit of batteries and night fighter aircraft.

SECTION POST  -  A large pillbox-like structure, often L-shaped or angular, with numerous loopholes used as a defensive position.

SHELTER  -  Air raid shelter of unknown type.

SLIT TRENCH  -  A short trench used to protect troops or to provide defensive fire from, often dug for practice purposes.

SPIGOT MORTAR EMPLACEMENT  -  A pit or emplacement surrounding a concrete pedestal or 'thimble' which was used to mount a spigot mortar. Deployed by the Home Guard during WWII as an anti invasion measure.

STANTON SHELTER  -  An air raid shelter constructed of prefabricted curved concrete panels often found on airfields.

Starfish Bombing Decoy (SF Series)  -  A decoy site designed to simulate a burning urban area during a bombing raid in order to lure enemy bombers away form legitimate targets.

SUBMARINE MINE ESTABLISHMENT  -  A complex of purpose-built or adapted buildings used for the maintenance, storage, assembly and control of sea mines and minefields.

TETT TURRET  -  A small concrete turret placed on top of a standard 4ft diameter concrete pipe sunk into the ground intended for use in defending road junctions.

TORPEDO STATION  -  A land based establishment armed with torpedoes and used to defend the coast from enemy shipping.

TRENCH  -  A linear fieldwork dug as a means of concealment, protection or both.

VICKERS MACHINE GUN EMPLACEMENT  -  A square concrete pillbox-like structure with 36in thick walls and a single large embrasure used to emplace a Vickers Medium Machine Gun. The entrance was protected by an external blast wall.

VULNERABLE POINT  -  A location vulnerable to attack from the enemy but essential for the movement of troops and which if captured could divide a defending force. As a result such locations are defended with anti invasion defences such as pillboxes.

WEAPON PIT  -  Usually a small two or three man trench dug as an isolated fieldwork rather than as part of a defensive system. A WWI and WWII feature.
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Offline Paul

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Re: Glossary of Terms
« Reply #4 on: November 13, 2011, 01:49:28 »
RML - rifled muzzle-loading, a rilfled gun loaded through its muzzle
BL - breech-loading, a gun loaded through its breech    
ML - muzzle-loading, a gun loaded through its muzzle
AA - anti-aircraft
HAA - heavy anti-aircraft, Large caliber guns firing fragmentation shells using range finders/searchlights or radar(normally fixed units)
LAA - light anti-aircraft, Light to medium calibre guns.(normally mobile units)
AAA - anti-aircraft artillery
Z Battery - multiple projectors that fire two 3inch unrotated projectiles (anti-aircraft rockets) having a maximum altitude of 19,000ft. and a ground range of 10,000 Yards. The heavy finned rockets were about six feet long and each had an adjustable nose fuse to be set to explode the warhead at the correct altitude.
Z Rocket - a 3inch unrotated projectile about 6ft long with a range of 19,000ft/10.000yds(also see Z-Battery)
XDO(ExDO) Post - Extended Defence Officers Post.http://www.pillbox-study-group.org.uk/exdopostpage.htm
OP - Observation Post
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Offline kyn

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Re: Glossary of Terms
« Reply #3 on: November 12, 2011, 14:22:25 »
Post any you think should be included below and I can add them to the post when placed in the right board.

Offline Paul

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Re: Glossary of Terms
« Reply #2 on: November 12, 2011, 13:36:34 »
Great stuff :)

How do we add to this? Only, Embrasure,Merlon and a few others are not there..
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Offline Leofwine

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Glossary of Terms - Military and Fortifications
« Reply #1 on: November 12, 2011, 00:19:48 »
Bailey -The outer courtyard of a castle, surrounded by a curtain wall or palisade. Also used to mean the outer defensive wall that surrounds the outer courtyard of a castle.

Barbette - Gun mounted on a free standing carriage behind ramparts.

Barrack - A building providing accomodation for soldiers.

Bastion - Projection from the general outline of a fortress from which the defenders can see and give flanking fire to the ground in front of the ramparts.

Banquette  - Firing step along the interior of a parapet.

Battery - A position for mounting a number of guns, usually all with a similar field of fire.

Blockhouse - A small, fortified barrack.

Boom - A removable floating barrier to close a channel to shipping.

Cannon - A large, heavy piece of artillery, typically mounted on wheels, that fires heavy projectiles. Cannon include guns, howitzers, and mortars.

Caponier - Covered passage within a ditch of a fort either for sheltering communication with the outworks or for providing flanking fire in the ditch.

Carronade - A naval gun of short barrel and large bore produced by the Scottish Carron Iron Co.

Casemate - Bomb proof vault, usually arched, providing an emplacement for a gun.

Counterscarp - The outer side of a ditch.

Couvre-Porte - A defendible gate way.

Covered way - A protected communication road/path, usually around the works of a fortress on the outer edge of the ditch, protected from enemy fire by earthworks.

Crenel - An open space or notch between two merlons in a battlement or crenelated wall.

Crenelation - A rampart or wall built around the top of a castle with regular gaps for shooting arrows or guns.

Crownwork - A crownwork serves a similar purpose to a Hornwork, but unlike a hornwork, it contains full bastions.

Curtain, Curtain Wall - Portion of a wall or rampart which connects two adjacent positions.

Drawbridge - A moveable wooden bridge which can be raised towards a gateway by means of chains or ropes attached to its outer end.

Embrasure - An opening in a thick wall for a door or window, especially one with sides angled so that the opening is larger on the inside of the wall than on the outside, usually a flared opening for a gun in a wall or parapet.

Enceinte - Main line of bastions and curtains as distinguished from outworks.

Enfilade Fire - Weapons fire which sweeps a line of fortifications from end to end along its length.

Expense magazine - A magazine, usually attached to a battery containg additional ammunition to resupply the guns quickly.

Fausse-Braye - Secondary enciente, exterior and parallel to the main rampart and considerably below its level.

Flank - Part of a fort constructed at an angle to the general line in order to command the ground before the latter by side or flanking fire.

Garrison - The troops stationed at a particular place for its defence.

Glacis - Parapet of the covered way extended in a long slope to meet the natural surface of the ground.

Gorge - Rear of a defensive work, whether open or closed.

Haxo Casemate - Casemate built into a rampart singly or in pairs to protect a gun enclosure.

Hornwork - A defensive outwork consisting of a pair of demi-bastions with a curtain wall connecting them and with two long sides directed upon the faces of the bastions, or ravelins of the inner fortifications, so as to be defended by them. often used to prevent the enemy occupying an area of high ground or simply strengthen the overall fortifications in the expected direction of attack.  

Howitzer - A cannon that combines certain characteristics of guns and mortars. The howitzer delivers projectiles with medium velocities, either by low or high trajectories.

Invalid - Soldier either too old or not physically fit for active service but capable of garrison duty.

Keep - The main tower within the walls of a medieval castle or fortress

Lines - A system of regular defensive earthworks.

Loopholes - Openings through which a musket or rifle can be fired.

Magazine - A building to store ammunition.

Merlon - The solid upright section in a crenellated battlement.

Mortar - A muzzle-loading cannon having a short barrel and relatively wide bore that fires low-velocity shells in high trajectories over a short range.

Motte - A natural or man-made mound on which a castle was erected.

Musket - A long-barrelled muzzle-loading shoulder gun used between the 16th and mid-19th centuries by infantry soldiers.

Outworks - All the works constructed beyond the mainbody of a fortification such as ravelins, covered ways, etc.

Palisade - A wall or fence, usually of sharpened logs, used as a fortification. Usually atop a rampart.

Palisade Fence - Iron railed spike topped fence designed to be unclimbable.

Parapet - A raised wall or screen at the top of a fortification protecting troops from enemy fire and observation.

Platform, Gun Platform - Floor on which the cannon in a battery are placed.

Rampart - A mass of excavated earth on which the troops and guns of the garrison are elevated, usually associated with a ditch.

Ravelin - A triangular fortification or detached outwork, located in front of the innerworks of a fortress. The edges of the ravelin are placed so that the guns there can sweep fire upon the attacking troops as they approach the curtain. The wall facing the inner fortifications is low and designed so that it will not provide shelter to attacking forces in case the ravelin is overtaken by the attackers or abandoned by the defenders.

R.A. - Royal Artillery, an army regiment.

Redoubt - Small enclosed work without flank defence from its own parapet, ofton forming a final strongpoint for the defenders.

Revetting - Lining a ditch wall with bricks or wood to strenghten it and to make it more regular.

R.E. - Royal Engineers, an army regiment.

R.F.C. - Royal Flying Corps, forerunner to the R.A.F.

Rifle - A firearm with a rifled bore, designed to be fired from the shoulder.

Rifling - Spiral grooves cut within a gun barrel to improve accuracy.

R.O.C. - Royal Observer Corps.

Salient - Angled defensive work jutting out from the main fortification.

Sally-Port - Subsidiary gate or opening which serves as a communication or egress for troops engaged in a sally.

Scarp - The side of a ditch cut nearest to and immediately below a rampart.

Spur - Outwork consisting of two faces forming a salient angle.

Talus - The sloping side of a wall ot rampart, usually behind the rampart

Tenaile - A raised area to protect an exposed area of wall.

Terre-plein - Surface of a rampart behind the parapet where guns are mounted.

Trace - Plan of a fortified place with its angles of fire.

Transverse - Mound of earth or wall thrown up to stop enfilading fire along any line of work which is vulnerable to it.

And since a picture is worth a thousand words.
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