Acronym

Event description

Definition

MIL/ADACAR

Air defence action area

An air defence operations area and the airspace above it where air defence procedures are specified.

MIL/ADIDZN

Air defence identification zone

Airspace within which ready identification, location, and control of airborne vehicles are required.

MIL/ADVRTE

Advisory route

A designated route along which air traffic advisory service is available.

MIL/AIMPT

Aim point

The point to which a weapon is targeted.

MIL/AIRCOA

Airspace coordination area

A three-dimensional block of airspace in a target area, established by the appropriate ground commander, in which friendly aircraft are reasonably safe from friendly surface fire.  The ACA may be formal or informal.

MIL/AIRCSA

Airspace control subarea/sector

Sub-element of an airspace control area, established to facilitate the control of the overall area.

MIL/AIREWA

Airborne early warning area

Airspace established specifically for airborne platforms conducting early warning.

MIL/AIRH

Airhead

A designated area in a hostile or threatened territory which, when seized and held, ensures the continuous air landing of troops and material and provides manoeuvre space for operations.

MIL/AIRRFL

Air-to-air refuelling area

Airspace of defined dimensions set aside for air-to-air refuelling operations, excluding special operation forces air-to-air missions.

MIL/AIRRTE

Air route

Established to route non-operational and operational support traffic through air defences in the rear area.

MIL/AIRTSR

Air traffic services route

A specified route designed for channelling the flow of traffic as necessary for the provision of air traffic services (ATS).

MIL/ALTRAR

Altitude reservation area

Block of altitude reserved for aircraft to transit or loiter.

MIL/ALTSPL

Alternate supply route

A route or routes designated within an area of operations to provide for the movement of traffic when main supply routes become disabled or congested.

MIL/AMPDZN

Amphibious defence zone

Area encompassing the amphibious objective area and adjoining airspace as required for the accompanying naval force.

MIL/AMPHOA

Amphibious operation area

An area location that is the part of the objective area within which are conducted the landing operations of an amphibious force. It includes the beach, the approaches to the beach, the transport areas, the fire support areas, the air occupied by close supporting aircrafts and the land included in the advance inland to the initial objective.

MIL/AMPOZN

Amphibious objective area

Geographic area delineated for the purpose of command and control within which is located the objective(s) to be secured by the amphibious task force.

MIL/AOC

Area of coverage

The summation of geographical areas under surveillance or protected by supporting fire.

MIL/ARA

Artillery area

An area location assigned to artillery units for terrain management purposes on which the artillery manoeuvres..

MIL/ARSMTG

Area smoke target

Area in which fires with smoke bombs or rockets degrade temporarily the capability of enemy forces to see within.

MIL/ASLTPO

Assault Position

That position between the line of departure (LD) and the objective in an attack from which forces assault the objective.  Ideally, it is the last covered and concealed position before reaching the objective.

MIL/ATTFIR

Attack by fire position

An area against which fire is employed to destroy the enemy from a distance, normally used when the mission does not dictate or support occupation of the objective.

MIL/AXIS

Axis of advance

A general area through which the bulk of a units combat power must move to draw the enemies attention away from the location of the commanders decisive operation.  Forces conducting a feint make direct fire contact with the enemy.

MIL/BASDZN

Base defence zone

A zone established around airbases to enhance the effectiveness of local ground based air defence systems.

MIL/BCHH

Beachhead

A designated area on a hostile shore which, when seized and held, ensures the continuous landing of troops and materiel, and provides manoeuvre space requisite for subsequent projected operations ashore. It is the physical objective of an amphibious operation.

MIL/BERLIN

Bearing line

No definition given

MIL/BRDGH

Bridgehead

An area location held or to be gained on the enemy’s side of a water obstacle.  Army—In river-crossing operations, an area on the enemy’s side of the water obstacle that is large enough to accommodate the majority of the crossing force and that has adequate terrain to permit defence of the crossing sites, and that provides a base for continuing the attack.

MIL/BUFRZN

Buffer zone

Airspace designed specifically to provide a buffer between various airspace control measures.

MIL/BULEYE

Bull's - eye

A reference point from which bearing and distance are given.

MIL/CFL

Coordination fire line

A line beyond which conventional surface fire support may fire at any time within the area of operations of the establishing headquarters without additional co-ordination. NOTE Also known as Coordinated fire line.

MIL/CLSASP

Class-A airspace

An airspace in which only instrument flight rule flights are permitted; all flights are subject to air traffic control service and are separated from each other.

MIL/CLSBSP

Class-B airspace

An airspace in which instrument flight rule and visual flight rule flights are permitted; all flights are subject to air traffic control service and are separated from each other.

MIL/CLSCSP

Class-C airspace

An airspace in which instrument flight rule and visual flight rule flights are permitted; all flights are subject to air traffic control service and instrument flight rule flights are separated from other instrument flight rule flights and from visual flight rule flights.  Visual flight rule flights are separated from instrument flight rule flights and receive traffic information in respect to other visual flight rule flights.

MIL/CLSDSP

Class-D airspace

An airspace in which instrument flight rule and visual flight rule flights are permitted; all flights are subject to air traffic control service and instrument flight rule flights are separated from other instrument flight rule flights and receive traffic information in respect to visual flight rule flights.  Visual flight rule flights receive traffic information in respect to all other flights.

MIL/CLSESP

Class-E airspace

An airspace in which instrument flight rule flights and visual flight rule flights are permitted; all flights are subject to air traffic control service and are separated from other instrument flight rule flights.  All flights receive traffic information as far as practical.

MIL/CLSFSP

Class-F airspace

An airspace in which instrument flight rule and visual flight rule flights are permitted; all participating instrument flight rule flights receive an air traffic advisory service and all flights receive flight information service if requested.

MIL/CLSGSP

Class-G airspace

An airspace in which instrument flight rule and visual flights are permitted; all flights receive flight information service if requested.

MIL/CLSHAR

Close air support holding area

Airspace designed for holding orbit and used by rotary and fixed-winged aircraft in close proximity to friendly forces.

MIL/CNTPTA

Contact point, air

A point that identifies the position at which a mission leader makes radio contact with an air control agency.  Note:  A point used for control purposes in air-to-air refueling and close air support missions.

MIL/CONCA

Concentration area

An area, usually in the theatre of operations, where troops are assembled before beginning active operations.

MIL/CONDRT

Conditional route

A non-permanent air traffic service route or portion thereof which can be planned and used only under certain conditions.

MIL/COOAAR

Coordinated air defence area

A mutually defined block of airspace between land-based air commander and a naval commander when their forces are operating in close proximity to one another.

MIL/COORLV

Coordination level

A procedural method to separate fixed and rotary wing aircraft by determining an altitude below which fixed wing aircraft normally will not fly.

MIL/CRCNZN

Carrier control zone

Area around a ship operating fixed/rotary wing aircraft.

MIL/CRDALT

Coordinating altitude

A procedural airspace control method to separate fixed-and rotary-wing aircraft by determining an altitude below which fixed-wing aircraft will normally not fly and above which rotary-wing aircraft normally will not fly. The coordinating altitude is normally specified in the airspace control plan and may include a buffer zone for small altitude deviations.

MIL/CRSVZN

Crossover zone

Airspace beyond the missile engagement zone into which fighters may pursue targets to complete interception.

MIL/DA

Direction of attack

A specific direction or assigned route a force must use to draw the enemies attention away from the location of the commanders decisive operation.  Forces conducting a feint make direct fire contact with the enemy.

MIL/DEFPOS

Defensive position

An area location that is designed to prevent the advance of the enemy (normally occupied by a unit).

MIL/DEFZ

Defence zone

The area extending from the forward edge of the battle area to its rear boundary.

MIL/DNPKPT

Downed aircrew pickup point

A point to where aviators will attempt to evade and escape to be recovered by friendly forces.

MIL/DPBSLN

Deep battle synchronization line

The forward boundary of the ground component commander's (GCC) area of operation.  The DBSL defines the geographic areas of responsibility of the GCC and air component commander.

MIL/ELCCAR

Electronic combat area

Airspace established specifically for airborne platforms engaging in electronic combat.

MIL/ENCRCL

Encirclement

An area location to indicate the loss of freedom of manoeuvre to one force resulting from an enemy force’s control of all routes of egress and reinforcement.

MIL/ENDARP

End aerial refuelling point

A point location that identifies the point that marks the end of a straight-line segment along which a tanker aircraft offloads fuel to a receiving aircraft.

MIL/ENGREG

Engineer regulating point

Checkpoint to ensure that vehicles do not exceed the capacity of the crossing means and to give drivers final instructions on site-specific procedures and information, such as speed and vehicle interval.

MIL/FALRAR

Falcon radials area

Planned magnetic bearings along which aircraft depart and return to ships.

MIL/FCZ

Forward combat zone

An area location compromising the territory forward of the corps rear boundary.

MIL/FEBA

Forward edge of the battle area

The foremost limits of a series of areas in which ground combat units are deployed, excluding the areas in which the covering or screening forces are operating, designated to coordinate fire support, the positioning of forces, or the manoeuvre or units.

MIL/FINAPF

Final approach fix

[No definition]

MIL/FIRING

Fire position area

The specific location within an Artillery area from which a fire unit delivers fire.

MIL/FIRUMB

Fire umbrella

The airspace over a naval force at sea within the fire of ships' anti-aircraft weapons can endanger aircraft, and within which special procedures are established for identification and operation of friendly aircraft.

MIL/FLINRG

Flight information region

An airspace of defined dimensions within which flight information service and alerting service are provided.

MIL/FLT

Forward line of troops

A line that indicates the most forward positions of forces in any kind of military operation at a specific time.  It normally identifies the forward location of covering and screening forces. Army—The FLOT may be at, beyond, or short of the FEBA.

MIL/FNCOLN

Final coordination line

A line close to the enemy position used to coordinate the lifting and/or shifting of supporting fires with the final deployment of manoeuvre elements.  It should be recognizable on the ground.  It is not a fire support coordination measure.

MIL/FNPRFR

Final protective fire

An area against which an immediately available prearranged barrier of fire to provide close protection to positions and installations and is designed to impede enemy movement.

MIL/FOACAR

Force air coordination area

An area surrounding a force within which air coordination measures are required to prevent mutual interference between all friendly surface and air units and their weapon systems.

MIL/FOOPLN

Forward operating location

An advanced position, usually of a temporary nature, from which air or ground units operate.

MIL/FREFIR

Free fire area

A specific designated area into which any weapon system may fire without additional coordination with the establishing headquarters.  Normally, it is established on identifiable terrain by division or higher headquarters.

MIL/FSCL

Fire-support coordination line

Designated by a line extending across the assigned areas of the establishing headquarters.  NOTE:  Designated by a line extending across the assigned areas of the establishing headquarters.  The indicator of the establishing headquarters is shown after the letters FSCL.

MIL/FUP

Forming up place

The last position occupied by the assault echelon before crossing the start line/line of departure.  Also called attack position.

MIL/FWDZON

Forward area air defence zone

A specifically defined air space in the combat zone for which air defence must be planned and provided.

MIL/HAMZON

High altitude missile engagement zone

A zone location that identifies the airspace of defined dimensions within which the responsibility for engagement of air threats normally rests with high-altitude surface-to-air missiles.

MIL/HDAZON

High density airspace control zone

Airspace designated in an airspace control plan or airspace control order in which there is a concentrated employment of numerous and varied weapons and airspace users.  A high-density airspace control zone has defined dimensions that usually coincide with geographical features or navigational aids.  Access to a high-density airspace control zone is normally controlled by the manoeuvre commander.  The manoeuvre commander can also direct a more restrictive weapons status within the high-density airspace control zone.

MIL/HIDE

Hide

An area in which a force conceals itself before operations or before moving into battle position.

MIL/HNDVGT

Hand over gate

A point at which the control of the aircraft, if radar hand over is used, changes from one controller to another.

MIL/IDSFPT

Identification safety point

A point at which aircraft, on joining a maritime force, will attempt to establish two-way communications with the surface force and commence identification procedures.

MIL/IFFOFF

Identification Friend Foe switch off line

Line demarking where friendly aircraft enroute to targets stop emitting an Identification-Friend-Foe signal.

MIL/IFFONL

Identification Friend Foe switch on line

Line demarking where friendly aircraft returning to friendly territory start emitting an Identification-Friend-Foe signal.

MIL/INFLIN

Infiltration line

An infiltration lane is a control measure that fixes fire planning responsibilities and coordinates forward and lateral movement of infiltrating units.

MIL/INIAPF

Initial approach fix

[No definition given]

MIL/INTOBJ

Intermediate objective

An area or feature between the line of departure and an objective that must be seized and/or held.

MIL/ISR

Identification safety range

Minimum range to which an aircraft may close to a maritime force without having been positively identified as friendly.

MIL/JEZ

Joint engagement zone

In air defence, that airspace of defined dimensions within which multiple air defence systems (surface-to-air missiles and aircraft) are simultaneously employed to engage air threats.

MIL/KEYTER

Key terrain

Any locality, or area, the seizure of which affords a marked advantage to either combatant.

MIL/KILBOX

Kill box

A volume of airspace where fighter aircraft operate in a weapons free mode and can use their weapons in beyond line of sight operations.

MIL/KILLA

Killing area

A zone in which a commander plans to force the enemy to concentrate so as to destroy him.

MIL/LAMZON

Low altitude missile engagement zone

A zone location that identifies that airspace of defined dimensions within which the responsibility for engagement of air threats normally rests with low to medium altitude surface-to-air missiles.

MIL/LATR

Lateral route

A line location that indicates a route generally parallel to the forward edge of the battle area, which crosses, or feeds into axial routes.

MIL/LGHTLN

Light line

A designated phase line forward of which vehicles are required to use black-out lights at night.

MIL/LIMADV

Limit of advance

An easily recognizable point location beyond which attacking elements will not advance.

MIL/LINTGT

Linear target

A target that is linear in nature, for example a vehicle convoy.

MIL/LLTR

Low level transit route

A temporary corridor of defined dimensions established in the forward area to minimize the risk to friendly aircraft from friendly air defences or surface forces.

MIL/LNFEZN

Land fighter engagement zone

Airspace of defined dimensions within which the responsibility for engagement of air threats normally rests with a fighter aircraft.

MIL/LNKPPT

Linkup point

A point location with an easily recognizable point location on the ground where two forces conducting a linkup meet.  When one force is stationary, linkup points normally are established where the moving force’s routes of advance intersect the stationary force’s security elements.  Linkup points for two moving forces are established on boundaries where the two forces are expected to converge.

MIL/LNMEZN

Land missile engagement zone

Airspace of defined dimensions within which the responsibility for engagement of air threats normally rests with the surface based air defence system.

MIL/LNSMTG

Linear smoke target

A line along which fires with smoke bombs or rockets degrade temporarily the capability of enemy forces to see through.

MIL/LOA

Line of advance

A general trace delineating the location where two opposing forces are engaged.

MIL/LOC

Line of contact

The designation of forward friendly positions as the LD when opposing forces are in contact.

MIL/LODLND

Line of departure, land

A line designated to coordinate the departure of attack elements (commitment of attacking units or scouting elements at a specific time).

MIL/LODSEA

Line of departure, sea

A suitably marked offshore coordinating line to assist assault craft to land on designated beaches at scheduled times.

MIL/LOGNET

Logical network

A chain of interconnecting communications elements logically designed to function in a specified manner.

MIL/LOGNOD

Logical node

A point location that participates as a logical element in a communications network.

MIL/LRADLN

Left radial line

A line drawn between points identified from the left side from the cloud top height, cloud bottom height and 2/3-stem height on the fallout vector plot.

MIL/MEZ

Missile engagement zone, general

In air defence, that airspace of defined dimensions within which the responsibility for engagement of air threats normally rests with short-range air defence weapons.  It may be established within a low or high altitude missile engagement.

MIL/MLOPAR

Military operations area

Airspace established outside class "A" airspace to separate or segregate certain non-hazardous military activities from instrument flight rule traffic and to identify for visual flight rule traffic where these activities are conducted.

MIL/MNSFD1

Minimum safe distance 1

The minimum safe distance for warned, protected personnel measured to the nearest 100 metres from the planned ground zero.

MIL/MNSFD2

Minimum safe distance 2

The minimum safe distance for warned, exposed personnel measured to the nearest 100 metres from the planned ground zero.

MIL/MNSFD3

Minimum safe distance 3

The minimum safe distance for unwarned, exposed personnel measured to the nearest 100 metres from the planned ground zero.

MIL/MRFEZN

Maritime fighter engagement zone

The airspace beyond the crossover zone out to limits defined by the officer in tactical command, in which fighters have freedom of action to identify and engage air targets.

MIL/MRMEZN

Maritime missile engagement zone

A designated airspace in which, under weapons control status weapons free, ships are automatically cleared to fire at any target which penetrates the zone, unless known to be friendly, adhering to airspace control procedures or unless otherwise directed by the anti-air warfare commander.

MIL/MRR

Minimum risk route

A temporary corridor of defined dimensions recommended for use by high-speed, fixed-wing aircraft that presents the minimum known hazards to low-flying aircraft transiting the combat zone. Army—An MRR is a temporary flight route recommended for USAF use.  It presents the minimum known hazards to low-flying aircraft in the control zone (CZ).  The MRR must be approved by the airspace control authority and avoids fire support targets such as air defence weapons, landing zones, pick-up zones, FARPs, and Army airfields.

MIL/MRSHGT

Marshalling gate

A point to which aircraft fly for air traffic purposes prior to commencing an outbound transit after takeoff or prior to landing.

MIL/MSLARC

Missile arc

An area of 10-degrees or as large as ordered by the officer-in-actual command, centred on the bearing of the target with a range that extends to the maximum range of the surface-to-air missile.

MIL/NAMAIN

Named area of interest

A point or area along a particular avenue of approach through which enemy activity is expected to occur.  Activity or lack of activity within an NAI will help to confirm or deny a particular enemy course of action.

MIL/NUCTGT

Nuclear target

No definition given

MIL/OBFARE

Obstacle free area

An area the commander designates as restricted from the emplacement of man-made obstacles, normally to facilitate future operations.

MIL/OBJA

Objective area

A defined area within which is located an objective to be captured or reached by the military forces.

MIL/OBRARE

Obstacle restricted area

A command and control measure used to limit the type or number of obstacles within an area.

MIL/OBSBLT

Obstacle belt

Normally, a brigade-level obstacle control measure that specifies the intent and location of subordinate obstacles.  It also supports the intent of the higher headquarters obstacle zone.

MIL/OBSGAP

Obstacle gap

An area within a minefield or obstacle belt, free of live mines or obstacles, whose width and direction will allow a friendly force to pass through in tactical formation.

MIL/OBSLAN

Obstacle lane

A route through an enemy or friendly obstacle that provides a passing force safe passage.  The route may be reduced and proofed as part of a breach operation, or constructed as part of a friendly obstacle.  A clear route through an obstacle.

MIL/OBSLIN

Obstacle line

A single line of natural or man made obstacles.

MIL/OBSZON

Obstacle zone

A division-level command and control measure, normally done graphically, to designate specific land areas where lower echelons are allowed to employ tactical obstacles.

MIL/PHLINE

Phase line

A line used for control and coordination of military operations, usually a terrain feature extending across the zone of action.  Army—A line used for control and coordination of military operations.  It is usually along a recognizable terrain feature extending across the sector or zone of action.

MIL/PIRAZN

Positive identification radar advisory zone

An area within which navy ships separate friendly from hostile aircraft.

MIL/PNTRBX

Penetration box

No definition given

MIL/POPUPT

Pop-up point

The location at which aircraft quickly gain altitude for target acquisition and engagement.

MIL/PRIMPT

Predicted impact point

The point at which a projectile, bomb or re-entry vehicle is expected to strike on earth.

MIL/RBFA

Rear boundary of the forward area

A line delineating the rear of an area in proximity to combat.

MIL/RCZ

Rear combat zone

An area location usually compromising the territory between the corps rear boundary and the army group rear boundary.

MIL/RDCOSP

Reduced co-ordination airspace

A portion of defined dimensions within which general air traffic (GAT) is permitted "off-route" without requiring GAT controllers to initiate co-ordination with operational air traffic (OAT) controllers.

MIL/RELL

Release line

Phase line used in river-crossing operations that delineates a change in the headquarters controlling movement.

MIL/RELPT

Release point

A well-defined point on a route at which the elements composing a column return under the authority of their respective commanders, each one of these elements continuing its movement toward its own appropriate destination.

MIL/RETFRT

Return to force route

Planned route profiles for use by friendly aircraft returning to an aircraft-capable ship.

MIL/RFL

Restricted fire line

A line established between converging friendly forces (one or both may be moving) that prohibits fires or effects from fires across the line without coordination with the affected force.  It is established by the commander of the converging forces.

MIL/RIPL

Reconnaissance and interdiction planning line

A line location to divide responsibility for the nomination of ground targets.  Short of the RIPL the ground commander has this responsibility for nominating targets that have a direct bearing on the land battle.  Beyond this, the targeting authority lies with the Air Commander.

MIL/ROTAAR

Release other than attack (ROTA) isolation and hazard area

The predicted or confirmed contour of the toxic industrial material isolation and hazard area.

MIL/RRADLN

Right radial line

A line drawn between points identified from the right side from the cloud top height, cloud bottom height and 2/3-stem height on the fallout vector plot.

MIL/RSFARE

Restricted fire area

An area in which specific restrictions are imposed and into which fires that exceed those restrictions may not be delivered without prior coordination with the establishing headquarters.

MIL/RSOPAR

Restricted operations area

Airspace designated by the airspace control authority, in response to specific operational situations/requirements within which the operation of one or more airspace users is restricted.

MIL/RSOPZN

Restricted operations zone

A volume of airspace of defined dimensions designated for a specific operational mission.  Entry into that zone is authorized only by the originating headquarters.

MIL/SAFELN

Safe lane

A bi-directional lane connecting an airbase, landing site and/or base defence zone to adjacent routes/corridors.  Safe lanes may also be used to connect adjacent activated routes/corridors.

MIL/SFAREV

Safe area for evasion

Designated area in hostile territory that offers the evader or escapee a reasonable chance of avoiding capture and of surviving until he can be evacuated.

MIL/SHAPE

Shape

Outline of an object in the horizontal plane.

MIL/SHPCZN

Ship control zone

An area activated around a ship operating aircraft, which is not to be entered by friendly aircraft without permission, in order to prevent friendly interference.

MIL/SPEMAR

Special electronic mission area

Airspace established specifically for airborne platforms conducting special electronic missions.

MIL/SPOFSP

Special operations forces airspace

Airspace specifically for special operations forces missions requested by special operations forces airspace planners.

MIL/SPTPOS

Support by fire position

An area by which a manoeuvre element moves to a position in the battle space where it can engage the enemy by direct fire.  The manoeuvre element does not attempt to manoeuvre to capture enemy forces or terrain.

MIL/SRADZN

Short range air defence engagement zone

Airspace within which the responsibility for engagement of air-threats normally rests with short-range air defence weapons.

MIL/SSMSAR

Surface-to-surface missile system area

Airspace defined specifically for army tactical missile system and tomahawk land attack missile launch and impact points.

MIL/STAGA

Staging area

A CONTROL-FEATURE-TYPE that is a general locality established for the concentration of organisations and transient persons between movements over the lines of communications.

MIL/STDART

Standard-use army aircraft flight route

Routes that are established below the coordinating altitude to facilitate the movement of Army aviation assets.  Normally, these routes are located in the corps through brigade rear area of operations.

MIL/TGTAOI

Targeted area of interest

An area or point location along a mobility corridor the successful interdiction of which will cause an enemy to either abandon a particular course of action or require him to use specialized engineer support to continue and where he can be acquired and engaged by friendly forces.

MIL/TGTRPT

Target reference point

An easily recognizable point location on the ground (either natural or man-made) used to initiate, distribute, and control fires.  TRPs can also designate the centre of an area where the commander plans to distribute or converge the fires of all his weapons rapidly.  They are used by task force and below, and can further delineate sectors of fire within an engagement area.  TRPs are designated using the standard target symbol and numbers issued by the fire support officer.  Once designated, TRPs also constitute indirect fire targets.

MIL/TRCNAR

Terminal control area

A control area normally established at the confluence of air traffic services routes in the vicinity of one or more major aerodromes.

MIL/TRRSAR

Terminal radar service area

Airspace surrounding designated airports wherein air traffic control provides radar vectoring, sequencing, and separation on a full-time basis for all instrument flight rule and participating visual flight rule aircraft.

MIL/TRVLVL

Traverse level

That vertical displacement above low level air defence systems, expressed both as a height and altitude, at which aircraft can cross that area in order to improve the effectiveness of the air defence systems by providing an extra friendly discriminator.

MIL/WARNAR

Warning area

Airspace extending from 3 nautical miles outward from the coast of the continental (us) that contains activity that may be hazardous to non-participating aircraft.

MIL/WAYPT

Way point

In air operations, a point or a series of points in space to which an aircraft may be vectored.  Army—A designated point or series of points loaded and stored in a GPS device to facilitate movement.

MIL/WPNCTL

Weapon control sector

The sector in which a specified weapon control status is imposed.  The sector is characterised as a plane figure enclosed by two radii of a circle and the arc between them.  The sector may be truncated from the vertex by a second sector.

MIL/WPNFZN

Weapons free zone

An air defence zone (ADZ) established around key assets or facilities which merit special protection by ground based air defence assets, other than airbases, where weapons may be fired at any target not positively identified as friendly.

MIL/ZFIRE

Zone of fire

An area into which a designated ground unit or fire support ship delivers, or is prepared to deliver, fire support.

MIL/ZONEI

Zone I

The distance in kilometers from Ground Zero (GZ) calculated on the basis of the weapon size and downwind speed.  Boundary on Zone 1 is determined by drawing 2 lines tangent to the cloud radius circle and intersecting the points on the radial lines where the Zone 1 downwind distance arc intersects these lines.

MIL/ZONEII

Zone II

Zone 2 is a secondary hazard zone whose boundaries are determined by the Zone 1 downwind distance arc, the Zone 2 distance arc and the 2 radial lines.