Table 6.36 — EEs for EAs with labels beginning with A
Attribute label Enumerant label Concept definition Figure(s) Code
ACCESS_DIRECTION_TYPE   The type of access direction of an <OBJECT> in reference to allowable traffic flow.    
  END End.   1
  ENTRY Entry.   2
  EXIT Exit.   3
  START Start.   4
ACCESSIBILITY_STATUS   The type of accessibility of an <OBJECT>; accessibility status.    
  CLOSED Access is officially prohibited; closed. The <OBJECT> may be covered and/or blocked by a <BARRIER>.   1
  CLOSED_LOCKED Access is officially prohibited and is restricted by a <BARRIER>, requiring special means to pass (e.g., a key); closed locked.   2
  LIMITED A limitation on access, but not function, has been imposed; limited. The limitation is not necessarily enforced by a <BARRIER>.   3
  LOCKED Access is prevented by a <BARRIER>, requiring special means to pass (e.g., a key); locked.   4
  OPEN Access is officially allowed; open. The <OBJECT> may be covered and/or blocked by a <BARRIER> that is temporarily passable.   5
  OPEN_LOCKED Access is officially allowed, although restricted by a <BARRIER> that is currently open, requiring special means to close and prevent future passage (e.g., a key); open locked.   6
  RESTRICTED Access is officially allowed, although a limitation on function has been imposed; restricted. The limitation is not necessarily enforced by a <BARRIER>.   7
ACCUMULATION_PERIOD_CATEGORY   The category of an <<ACCUMULATION_PERIOD>>.    
  ONE_SECOND One second.   1
  TWO_SECONDS Two seconds.   2
  FIVE_SECONDS Five seconds.   3
  TEN_SECONDS Ten seconds.   4
  FIFTEEN_SECONDS Fifteen seconds.   5
  THIRTY_SECONDS Thirty seconds.   6
  ONE_MINUTE One minute.   7
  TWO_MINUTES Two minutes.   8
  FIVE_MINUTES Five minutes.   9
  TEN_MINUTES Ten minutes.   10
  FIFTEEN_MINUTES Fifteen minutes.   11
  THIRTY_MINUTES Thirty minutes.   12
  ONE_HOUR One hour.   13
  TWO_HOURS Two hours.   14
  THREE_HOURS Three hours.   15
  FOUR_HOURS Four hours.   16
  SIX_HOURS Six hours.   17
  EIGHT_HOURS Eight hours.   18
  TWELVE_HOURS Twelve hours.   19
  TWENTY_FOUR_HOURS Twenty-four hours.   20
ACOUSTIC_CENTRE_FREQUENCY_BAND   The electro-acoustic one-third-octave band centre <<FREQUENCY>> (approximate).    
  BAND_1_HZ 1 hertz.   1
  BAND_1r25_HZ 1,25 hertz.   2
  BAND_1r6_HZ 1,6 hertz.   3
  BAND_2_HZ 2 hertz.   4
  BAND_2r5_HZ 2,5 hertz.   5
  BAND_3r15_HZ 3,15 hertz.   6
  BAND_4_HZ 4 hertz.   7
  BAND_5_HZ 5 hertz.   8
  BAND_6r3_HZ 6,3 hertz.   9
  BAND_8_HZ 8 hertz.   10
  BAND_10_HZ 10 hertz.   11
  BAND_12r5_HZ 12,5 hertz.   12
  BAND_16_HZ 16 hertz.   13
  BAND_20_HZ 20 hertz.   14
  BAND_25_HZ 25 hertz.   15
  BAND_31r5_HZ 31,5 hertz.   16
  BAND_40_HZ 40 hertz.   17
  BAND_50_HZ 50 hertz.   18
  BAND_63_HZ 63 hertz.   19
  BAND_80_HZ 80 hertz.   20
  BAND_100_HZ 100 hertz.   21
  BAND_125_HZ 125 hertz.   22
  BAND_160_HZ 160 hertz.   23
  BAND_200_HZ 200 hertz.   24
  BAND_250_HZ 250 hertz.   25
  BAND_315_HZ 315 hertz.   26
  BAND_400_HZ 400 hertz.   27
  BAND_500_HZ 500 hertz.   28
  BAND_630_HZ 630 hertz.   29
  BAND_800_HZ 800 hertz.   30
  BAND_1000_HZ 1 000 hertz.   31
  BAND_1250_HZ 1 250 hertz.   32
  BAND_1600_HZ 1 600 hertz.   33
  BAND_2000_HZ 2 000 hertz.   34
  BAND_2500_HZ 2 500 hertz.   35
  BAND_3150_HZ 3 150 hertz.   36
  BAND_4000_HZ 4 000 hertz.   37
  BAND_5000_HZ 5 000 hertz.   38
  BAND_6300_HZ 6 300 hertz.   39
  BAND_8000_HZ 8 000 hertz.   40
  BAND_10_KHZ 10 kilohertz.   41
  BAND_12r5_KHZ 12,5 kilohertz.   42
  BAND_16_KHZ 16 kilohertz.   43
  BAND_20_KHZ 20 kilohertz.   44
  BAND_25_KHZ 25 kilohertz.   45
  BAND_31r5_KHZ 31,5 kilohertz.   46
  BAND_40_KHZ 40 kilohertz.   47
  BAND_50_KHZ 50 kilohertz.   48
  BAND_63_KHZ 63 kilohertz.   49
  BAND_80_KHZ 80 kilohertz.   50
  BAND_100_KHZ 100 kilohertz.   51
  BAND_125_KHZ 125 kilohertz.   52
  BAND_160_KHZ 160 kilohertz.   53
  BAND_200_KHZ 200 kilohertz.   54
  BAND_250_KHZ 250 kilohertz.   55
  BAND_315_KHZ 315 kilohertz.   56
  BAND_400_KHZ 400 kilohertz.   57
  BAND_500_KHZ 500 kilohertz.   58
  BAND_630_KHZ 630 kilohertz.   59
  BAND_800_KHZ 800 kilohertz.   60
ACOUSTIC_REFLECTION_TYPE   The type of acoustic reflection from a <WATERBODY_FLOOR>.    
  FROM_WTRBODY_FLOOR Most of the reflected sound energy is reflected at the <BOUNDARY> between the <WATERBODY_FLOOR> and the <WATER>; from waterbody floor.   1
  FROM_BELOW_WTRBODY_FLOOR The sound energy penetrates a superficial layer of the <WATERBODY_FLOOR> (for example: <SEDIMENT>), so that the sound energy is reflected from below the <WATERBODY_FLOOR>.   2
AERIAL_FUNCTION   The function of an <AERIAL>.    
  AIR_TRAFFIC_CONTROL Air traffic control.   1
  MARINE_RADIO_SERVICE Transmits radio services useful to marine navigation.   2
  PUBLIC_SAFETY Transmits radio services important to public safety.   3
  RADAR Radar.   4
  RADIO_BROADCAST Radio broadcast.   5
  SATELLITE_UPLINK Satellite uplink.   6
  TELEVISION_BROADCAST Television broadcast.   7
AERIAL_TYPE   The structural type of an <AERIAL>.    
  DIPOLE Composed of two straight rods of equal <<LENGTH>> (corresponding to 1/4 the <<WAVELENGTH>> of the electromagnetic wave being transmitted or received), mounted in line with one another, and having an electrical connection to the centre of the <AERIAL>; dipole [SOED, "dipole", 2].   1
  HORN An open-ended waveguide, of increasing cross-sectional <<AREA>>, which radiates directly in a desired <DIRECTION> or feeds a reflector that forms a desired beam; horn [ATIS, "horn"].   3
  PARABOLIC An <AERIAL> consisting of a parabolic reflector and a radiating or receiving element at or near its focus [ATIS, "parabolic antenna"].   4
  PHASED_ARRAY A group of <AERIAL>s in which the relative phases of the respective signals feeding the <AERIAL>s are varied in such a way that the effective radiation pattern of the array is reinforced in a desired <DIRECTION> and suppressed in undesired <DIRECTION>s; phased array [ATIS, "phased array"].   2
  WHIP A flexible rod <AERIAL> supported on a base insulator; whip [ATIS, "whip antenna"]. A whip <AERIAL> is usually between 1/10 and 5/8 wavelength long.   5
  YAGI Composed of a number of short rods mounted transversely on an insulating support; yagi [SOED, "yagi"]. A yagi <AERIAL> is highly directional, receiving or transmitting within a narrow band of <<FREQUENCY>>s.   6
AERODROME_TYPE   The type of an <AERODROME>.    
  AERODROME <AERODROME>.   1
  AIRFIELD <AIRFIELD>.   2
  AIRPORT <AIRPORT>.   3
  DAFIF_A An active civil <AERODROME> controlled and operated by civil authorities primarily for use by civil <AIRCRAFT>, although military may have landing privileges and/or contract rights; DAFIF A. Minimum facilities are available that include: <CONTROL_TOWER> (or some similar control <SYSTEM>, such as a FSS that issues clearances and advisories when there is no <CONTROL_TOWER> or the <CONTROL_TOWER> is not in operation), <AERODROME_LIGHTING> (for example: flare pots), POL, and <AIRCRAFT>s for organizational maintenance, or better.   4
  DAFIF_B An active <AERODROME> jointly controlled, used, and/or operated by both civil and military agencies; DAFIF B. The military agencies are permanent operational flight line type tenants with, or without, <AIRCRAFT> stationed on the <AERODROME>. Facilities are the same as for civil (<<<DAFIF_A>>> type) <AERODROME>s.   5
  DAFIF_C An active military <AERODROME> controlled and operated by military authorities primarily for use by military <AIRCRAFT>, although civil <AIRCRAFT> may have landing privileges and/or contract rights; DAFIF C. Facilities are the same as for civil (<<<DAFIF_A>>> type) <AERODROME>s.   6
  DAFIF_D An active <AERODROME> having permanent surface <RUNWAY>s with less than the minimum facilities required for civil (<<<DAFIF_A>>> type) <AERODROME>s; DAFIF D. For the United States, the FAA term "inactive" is incorporated into this category.   7
  EMERGENCY Designated for the emergency take-off and landing of <AIRCRAFT>.   8
  GENERAL_AVIATION Designated for light and/or general aviation <AIRCRAFT> operations only.   9
  GLIDER Designated for the take-off and landing of glider <AIRCRAFT>.   10
  HANG_GLIDER Designated for the landing of hang glider <AIRCRAFT>.   11
  HELICOPTER Designated for the takeoff and landing of <HELICOPTER>s.   12
  HELIPORT <HELIPORT>.   13
  HELIPORT_AT_HOSPITAL A <<<HELIPORT>>> located at a <HOSPITAL_BUILDING>.   14
  MAJOR_AERODROME A major (controlled) <AERODROME> that has an operating <CONTROL_TOWER>. Air traffic control is responsible for providing for the safe, orderly, and expeditious flow of air traffic at <AIRPORT>s where the type of operations and/or volume of traffic requires such a service. Pilots operating from a controlled <AIRPORT> are required to maintain two-way radio communication with air traffic controllers, and to acknowledge and comply with their instructions.   15
  MICROLIGHT Designated for microlight or ultralight <AIRCRAFT>.   16
  MINOR_AERODROME A minor (uncontrolled) <AERODROME> that does not have an operating <CONTROL_TOWER>. Two-way radio communications are not required, although it is a good operating practice for pilots to transmit their intentions on the specified <<FREQUENCY>> for the benefit of other traffic in the vicinity.   17
  PARASCENDING Designated for parascending or parasailing <AIRCRAFT>.   18
  SEAPLANE_BASE <SEAPLANE_BASE>.   19
  UNDEFINED_LANDING Undefined landing <SITE>.   20
  WINCH_LAUNCHED_HANG_GLIDER Designated for the winch-launching of hang glider <AIRCRAFT>.   21
AERONAUTICAL_APPROACH_TYPE   The type of an aeronautical approach.    
  FINAL_FIX Final fix.   1
  INITIAL_FIX Initial fix.   2
  NON_PRECISION_INSTRUMENT Non-precision instrument.   3
  PRECISION_INSTRUMENT Precision instrument.   4
  STOL STOL.   5
  VISUAL Visual.   6
AERONAUTICAL_FUNCTION   The function of an aeronautical <OBJECT>.    
  AERODROME_TERMINAL <AERODROME_TERMINAL>.   1
  AID_TO_NAVIGATION_CHANGEOVER <AID_TO_NAVIGATION> identifying a changeover <LOCATION>.   2
  ALTIMETER_CHANGE Altimeter change.   3
  DECOY Decoy.   4
  FEEDER Feeder.   5
  MILEAGE_BREAK_DOWN Mileage break down.   6
  RADAR Radar.   7
  SEAPLANE_RUN <SEAPLANE_RUN>.   8
  TERMINUS Terminus.   9
  TERMINUS_OR_TERMINAL <<<TERMINUS>>> and/or <<<AERODROME_TERMINAL>>>.   10
  TRANSACTION Transaction.   11
  UNIDENTIFIED_AIRSTRIP Unidentified <AIRSTRIP>.   12
AERONAUTICAL_LIGHT_TYPE   The type of <LIGHTING> or <SYSTEM> of <LIGHTING> that supports aeronautical navigation; aeronautical light type.    
  AERODROME_TERMINAL <LIGHT>s associated with an <AERODROME_TERMINAL>.   1
  AEROMARINE A marine-type <LIGHT> for which part of the beam is deflected to an angle of 10 to 15 arc degrees above the horizon to facilitate use by <AIRCRAFT>; aeromarine.   2
  ALSF_I Approach <LIGHTING> with sequential flashing - type I.   3
  ALSF_II Approach <LIGHTING> with sequential flashing - type II.   4
  ALTERNATE_CENTRE_LINE Alternate centre-line and bar approach <LIGHT>s.   5
  APAP_ALIGNMENT An alignment of elements system consisting of a <SET> of three painted plywood panels (called approach path alignment panels: APAP) that are used as a visual glideslope indicator and is lighted for night use.   6
  APRON_FLOOD Floodlight associated with an <APRON>.   7
  ARTICULATED Articulated <LIGHT>.   8
  AUXILIARY Auxiliary <LIGHT>.   9
  BEACON_UNSPECIFIED A <BEACON> of unspecified type.   10
  BLINKING_LIGHT A blinking <LIGHT> displayed as a visual <AID_TO_NAVIGATION>.   11
  BOUNDARY <LIGHTING> associated with a <BOUNDARY>.   12
  CALVERT The standard <SYSTEM> of approach <LIGHTING> for Australia; Calvert.   13
  CENTRE_AND_DOUBLE_ROW Centre and double row <LIGHT>s.   14
  CENTRE_LINE_2_CROSSBAR Centre-line, 2 crossbars approach <LIGHT>s.   15
  CENTRE_LINE_AND_BAR Centre-line and bar <LIGHT>s.   16
  CENTRE_LINE_HIGH_INTENSITY Centre-line, high-intensity approach <LIGHT>s.   17
  CENTRE_ROW Centre row <LIGHT>s.   18
  CENTRE_ROW_1_HI_INTENSITY Centre row, IFR instrument landing system category 1, high intensity <LIGHT>s.   19
  CENTRE_ROW_2_HI_INTENSITY Centre row, IFR instrument landing system category 2, high intensity <LIGHT>s.   20
  CONSTANT_BEAM A signal <LIGHT> that shows continuously in all <DIRECTION>s with constant luminous intensity and colour; constant beam.   21
  CROSS Cross <LIGHT>.   22
  FISHING Fishing <LIGHT>s.   23
  FLARES Flares.   24
  FOG_DETECTOR A <LIGHT> used to automatically determine conditions of visibility on a <RUNWAY>; fog detector.   25
  FORMER_NATO_STANDARD Former <<<NATO_STANDARD>>>.   26
  HARBOUR Navigational <LIGHTING> associated with a <HARBOUR>.   27
  HIGH_INTENSITY_RUNWAY High intensity <LIGHT>s on a <RUNWAY>.   28
  HONG_KONG_CURVE The <SYSTEM> of approach <LIGHTING> for Kai Tak Airport in Hong Kong; Hong Kong curve.   29
  HORIZONTAL Horizontal <LIGHT>s.   30
  IDENTIFICATION_BEACON Identification <BEACON>.   31
  LANDING_DIRECTION <LIGHT> indicating landing <DIRECTION>.   32
  LEFT_ROW_HIGH_INTENSITY Row of high intensity <LIGHT>s on the left side on a <RUNWAY>.   33
  LEFT_SINGLE_ROW Single row of <LIGHT>s on the left side on a <RUNWAY>.   34
  LOW_COST_VASI Low cost <<<VASI>>>.   35
  LOW_INTENSITY_RUNWAY Low intensity <LIGHT>s on a <RUNWAY>.   36
  MAJOR Major.   37
  MALSF MALSF.   38
  MALSR MALSR.   39
  MEDIUM_INTENSITY_RUNWAY Medium intensity <LIGHT>s on a <RUNWAY>.   40
  MINOR Minor <LIGHT>.   41
  NARROW_MULTI_CROSS Narrow multi-cross <LIGHT>.   42
  NATO_STANDARD NATO standard.   43
  NEON_LADDER Neon ladder <LIGHT>.   44
  NONE_AVAILABLE None available.   45
  OBSTRUCTION Obstruction <LIGHT>.   46
  OBSTRUCTION_LIGHTING Obstruction <LIGHTING>.   47
  OCCASIONAL Occasional <LIGHT>.   48
  ODALS Consists of seven omnidirectional flashing <LIGHT>s located in the approach area of a nonprecision <RUNWAY>; ODALS. Five <LIGHT>s are located on the centre-line of the <RUNWAY> extended with the first <LIGHT> located 91,44 metres (300 feet) from the threshold of the <RUNWAY> and extending at equal intervals up to 457,2 metres (1 500 feet) from the threshold. The other two <LIGHT>s are located, one on each side of the threshold of the <RUNWAY>, at a lateral distance of 12,192 metres (40 feet) from the edge of the <RUNWAY>, or 22,86 metres (75 feet) from the edge when installed on a <RUNWAY> equipped with a <<<VASI>>> [F7110.65, "AIRPORT LIGHTING", a.9].   49
  OPTICAL_LANDING_SYSTEM Optical landing system.   50
  OTHER_AERODROME_LIGHTING Other aerodrome <LIGHTING>.   51
  OTHER_APPROACH_LIGHTING Other approach <LIGHTING>.   52
  OVERRUN_CENTRE_LINE <LIGHTING> associated with the <CENTRE_LINE> of a <RUNWAY_OVERRUN>.   53
  PORTABLE_APPROACH Portable approach <LIGHT>.   54
  PORTABLE_RUNWAY Portable <LIGHT>s on a <RUNWAY>.   55
  PRECISION_APPROACH Precision approach path indicator <LIGHT>.   56
  PRIMARY Primary <LIGHT>.   57
  PRIVATE Private <LIGHT>.   58
  RAIL RAIL.   59
  RANGE Range <LIGHT>.   60
  ROTATING_BEACON Rotating <BEACON>.   61
  RUNWAY <LIGHTING> associated with a <RUNWAY>.   62
  RUNWAY_CENTRE_LINE <LIGHTING> associated with the centre-line of a <RUNWAY>.   63
  RUNWAY_EDGE <LIGHTING> associated with the edge of a <RUNWAY>.   64
  RUNWAY_END Identification <LIGHTING> associated with the end of a <RUNWAY>.   65
  RUNWAY_FLOOD Flood <LIGHTING> associated with a <RUNWAY>.   66
  RUNWAY_REGION <LIGHT>s on both the <RUNWAY> and the <<<RUNWAY_EDGE>>>; runway region.   67
  SEASONAL Seasonal <LIGHT>.   68
  SECONDARY Secondary <LIGHT>.   69
  SEQUENCED_STROBE Sequenced strobe <LIGHT>.   70
  SINGAPORE_CENTRE_LINE The <SYSTEM> of approach <LIGHTING> for Changi Airport in Singapore; Singapore centre line.   71
  SINGLE_ROW_CENTRE_LINE Single row centre-line <LIGHT>s.   72
  SSALF SSALF.   73
  SSALR Simplified short approach <LIGHTING> with runway alignment indicator <LIGHT>s.   74
  STROBE A <LIGHT> with an extremely short duration flash; strobe.   75
  TAXIWAY_LIGHTING <LIGHTING> associated with a <TAXIWAY>.   76
  THRESHOLD Threshold <LIGHT>.   77
  TIDAL Tidal <LIGHT>.   78
  TOUCHDOWN_ZONE_LIGHTING Touchdown zone <LIGHTING>.   79
  TVASI_T_BAR T-bar <<<VASI>>>; TVASI.   80
  TWO_PARALLEL_ROW Two parallel row <LIGHT>s.   81
  US_AIR_FORCE_OVERRUN US Air Force <RUNWAY_OVERRUN>.   82
  US_NAVY_PARALLEL_ROW_AND_X US Navy parallel row and crossbar.   83
  VARIABLE_INTENSITY_RUNWAY Variable intensity <RUNWAY>.   84
  VASI VASI.   85
  VASI_2_BAR Two-bar <<<VASI>>>.   86
  VASI_3_BAR Three-bar <<<VASI>>>.   87
  VASI_PULSATING Pulsating <<<VASI>>>.   88
  VASI_WITH_INDICATOR <<<VASI>>> with indicator for threshold crossing height.   89
  VERTICAL Vertical <LIGHT>s.   90
  WIND_INDICATOR <LIGHTING> associated with a <WIND_INDICATOR>.   91
AERONAUTICAL_POINT_FUNCTION   The function of an aeronautical point <OBJECT> related to air traffic control.    
  AERODROME_REFERENCE Reference point at an <AERODROME>.   1
  ARCP_CONTROL ARCP.   2
  ARIP_INITIAL ARIP.   3
  COMPULSORY_REPORT Compulsory report.   4
  MISSED_APPROACH Missed approach.   5
  NAVIGATION_CHECK Navigation check.   6
  NON_COMPULSORY_REPORT Non-compulsory report.   7
  VISUAL_DESCENT Visual descent.   8
AERONAUTICAL_ROUTE_TYPE   The type of an <AIR_TRANSPORTATION_ROUTE>; aeronautical route type.    
  HIGH_ALTITUDE_ENROUTE High altitude enroute.   1
  LOW_ALTITUDE_ENROUTE Low altitude enroute.   2
  LOW_HIGH_ALTITUDE_ENROUTE <<<LOW_ALTITUDE_ENROUTE>>> and <<<HIGH_ALTITUDE_ENROUTE>>>.   3
AEROSOL_PARTICLE_TYPE   The type of <PARTICLE> in an <AEROSOL>.    
  DUST <DUST>.   1
  HAZE Fine <DUST>, <<<SALT_HAZE>>>, <<<MIST>>>, <SMOKE>, or other solid <PARTICLE>s that are invisible to the naked eye but which diminish horizontal visibility and give the <ATMOSPHERE> an opalescent appearance and render distant <OBJECT>s indistinct and subdued in colour; haze.   2
  MARINE <AEROSOL>s that are generated in the marine environment by processes such as breaking <WATER_WAVE>s, and <<<OCEAN_SPRAY>>>.   3
  MIST A <LOCALIZED_ATM_SUSPENSION> consisting of a visible aggregate of microscopic water droplets or wet hygroscopic <PARTICLE>s (of <<OUTSIDE_DIAMETER>> not less than 0,5 millimetre (0,02 inches)), reducing the horizontal <<VISIBILITY_DISTANCE>> at the <PLANETARY_SURFACE> to not less than 1 kilometre (5/8 miles); mist. The visibility reduction is less than for <FOG>.   4
  NITRATES Nitrates derived from NOx.   5
  NO_AEROSOL No <AEROSOL>s are present.   6
  OCEAN_SPRAY A stream of ocean <WATER> broken up into minute <PARTICLE>s and propelled into the <ATMOSPHERE>; ocean spray.   7
  SALT_HAZE <PARTICLE>s of salt, suspended in the <ATMOSPHERE> due to the evaporation of <<<OCEAN_SPRAY>>>; salt haze.   8
  SAND <PARTICLE>s of <SAND> suspended in the <ATMOSPHERE>.   9
  SMOKE <SMOKE>.   10
  SOOT Soot.   11
  SULFATES Sulfates derived from either biogenic gases or SO2.   12
  VOLCANIC_ASH Fine or very fine pyroclastic <PARTICLE>s less than 4 millimetres in diameter that are blown out from an explosion of a <VOLCANO>; volcanic ash.   13
  VOLCANIC_DUST <PARTICLE>s of <DUST> produced by an eruption of a <VOLCANO>; volcanic dust.   14
AID_TO_NAVIGATION_COLOUR-
_PATTERN
  The colour pattern of an <OBJECT> (for example: an <AID_TO_NAVIGATION>, a <BUOY>, a <BEACON>, and/or a <NAVIGATION_LIGHT>) of importance to navigation.    
  BORDER_STRIPE A band or stripe of colour that is displayed around the outer edge of an <OBJECT> and that may also form a border to an inner pattern or plain colour.   1
  CHECKERED Alternate colours are used to create rectangles similar to a chessboard and/or draughtboard; checkered.   2
  DIAGONAL_STRIPES Straight bands or stripes of differing colours painted diagonally.   3
  HORIZ_BANDS_TOP_TO_BOTTOM Horizontal bands from top to bottom.   4
  HORIZ_STRIPES Straight bands or stripes of differing colours painted horizontally.   5
  SINGLE_COLOUR A single colour.   6
  SQUARED Alternate colours are used to create squares similar to a chessboard and/or draughtboard in either a straight or diagonal pattern; squared. This pattern is also known as checker plate.   7
  STRIPES_DIRECTION_UNKNOWN Straight bands or stripes of differing colours painted in an unknown <DIRECTION>.   8
  VERTICAL_STRIPES Straight bands or stripes of differing colours painted vertically.   9
AID_TO_NAVIGATION_MARK_COLOUR   The colours of an <AID_TO_NAVIGATION> mark.    
  BLACK Black.   1
  BLACK_RED_BLACK Black with red band.   2
  BLACK_YELLOW Black above yellow band.   3
  BLACK_YELLOW_BLACK Black with yellow band.   4
  GREEN Green.   5
  GREEN_RED Green above red band.   6
  GREEN_RED_GREEN Green with red band.   7
  GREEN_WHITE Green and white.   8
  ORANGE Orange.   9
  RED Red.   10
  RED_GREEN Red above green band.   11
  RED_GREEN_RED Red with green band.   12
  RED_WHITE Red above white band.   13
  WHITE White.   14
  YELLOW Yellow.   15
  YELLOW_BLACK Yellow above black band.   16
  YELLOW_BLACK_YELLOW Yellow with black band.   17
  YELLOW_RED_YELLOW Yellow with red band.   18
AID_TO_NAVIGATION_MARK_SYSTEM   The specific <SYSTEM> of marks that serve as an <AID_TO_NAVIGATION> and to which an <OBJECT> conforms.    
  IALA Either <<<IALA_REGION_A>>> or <<<IALA_REGION_B>>>.   1
  IALA_REGION_A The IALA Region A <SYSTEM>.   2
  IALA_REGION_B The IALA Region B <SYSTEM>.   3
  NO_SYSTEM_PRESENT No <SYSTEM> is present.   4
  NON_IALA A defined <SYSTEM> other than IALA; non-IALA.   5
  SIGNI The SIGNI <SYSTEM>.   6
  US_INTRACOASTAL The US intracoastal waterway <SYSTEM> (ICW), which runs from Manasquan Inlet in New Jersey to the Florida Keys, then north along the west <COAST> of Florida and west along the Gulf <COAST> to Brownsville, Texas.   7
  US_MODIFIED The modified US <SYSTEM>.   8
  US_OLD The old US <SYSTEM>.   9
  US_UNIFORM_STATE The US USWMS, which covers inland boating.   10
  US_WESTERN_RIVER The US Western Rivers <SYSTEM>, which includes the Mississippi <RIVER> and its tributaries.   11
AID_TO_NAVIGATION_MARKER_TYPE   The type of a <MARKER> serving as an <AID_TO_NAVIGATION>.    
  ELEC_BEACON Electronic <BEACON>.
EXAMPLE     Radar pulse.
  1
  ELEC_BEACON_VIS_DAYMARK <<<ELEC_BEACON>>> with an attached <<<VIS_DAYMARK>>>; electronic beacon with visual daymark.   2
  VIS_BEACON Visual <BEACON>.
EXAMPLE     Flashing <LIGHT>.
  3
  VIS_BEACON_VIS_DAYMARK <<<VIS_BEACON>>> with an attached <<<VIS_DAYMARK>>>; visual beacon with visual daymark.   4
  VIS_DAYMARK Visual <MARKER> having a distinctive colour and shape that serves to facilitate its recognition against a daylight viewing background; visual daymark.   5
AID_TO_NAVIGATION_STATUS   The status of an <OBJECT> as an <AID_TO_NAVIGATION>.    
  LIT <<<MARKED>>> and illuminated; lit.   1
  MARKED Marked.   2
  UNLIT <<<MARKED>>> but not illuminated; unlit.   3
  UNMARKED Not <<<MARKED>>>; unmarked.   4
AID_TO_NAVIGATION_SYSTEM_TYPE   The type of a <SYSTEM> of <AID_TO_NAVIGATION>s.    
  IALA Either <<<IALA_REGION_A>>> or <<<IALA_REGION_B>>>.   1
  IALA_REGION_A The IALA Region A <SYSTEM>.   2
  IALA_REGION_B The IALA Region B <SYSTEM>.   3
  NON_IALA A defined <SYSTEM> other than IALA; non-IALA.   4
  NONCONFORMING Does not conform to any defined <SYSTEM>.   5
  SIGNI The SIGNI <SYSTEM>.   6
  US_INTRACOASTAL The US intracoastal waterway <SYSTEM> (ICW), which runs from Manasquan Inlet in New Jersey to the Florida Keys, then north along the west <COAST> of Florida and west along the Gulf <COAST> to Brownsville, Texas.   7
  US_MODIFIED The modified US <SYSTEM>.   8
  US_OLD The old US <SYSTEM>.   9
  US_UNIFORM_STATE The US Uniform State Waterway Marking System (USWMS), which covers inland boating.   10
  US_WESTERN_RIVER The US Western Rivers <SYSTEM>, which includes the Mississippi <RIVER> and its tributaries.   11
AIRCRAFT_CARRIER_CLASS   The class of an <AIRCRAFT_CARRIER>.    
  ASTURIAS Spain Principe de Asturias VSTOL.   1
  DE_GAULLE France Charles de Gaulle light (nuclear powered).   2
  DORIA Italy Andrea Doria VSTOL.   3
  ENTERPRISE US Navy Enterprise multirole.   4
  GARIBALDI Italy Giuseppe Garibaldi VSTOL.   5
  INVINCIBLE UK Invincible class VSTOL.   6
  KENNEDY US Navy John F. Kennedy multirole.   7
  KITTY_HAWK US Navy Kitty Hawk class multirole.   8
  KUZNETSOV Russia Kuznetsov multirole.   9
  NAREUBET Thailand Chakri Nareubet small VSTOL.   10
  NIMITZ US Navy Nimitz class multirole.   11
  SAO_PAULO Brazil Sao Paulo light (Clemenceau class).   12
  VIRAAT India Viraat VSTOL.   13
AIRCRAFT_FUNCTION   The operating function of an <AIRCRAFT>.    
  AGRICULTURE Applies seed, pesticides, and/or herbicides in agricultural <TERRAIN_SURFACE_REGION>s.   1
  AIR_DEFENCE Engages in air defence operations.   2
  AMBULANCE Transports sick and/or injured; ambulance.   3
  ASW Engages in ASW operations.   4
  ATTACK Engages in attack combat operations.   5
  BOMBER Carries and drops bombs; bomber.   6
  CARGO Transports <CARGO>.   7
  COMMAND_AND_CONTROL Operates in a command and control mode.   8
  COMMERCIAL Engages in commercial operations.   9
  EARLY_WARNING Utilizes long-range radar to detect approaching <AIRCRAFT> and/or <MISSILE>s; early warning.   10
  ELECTRONIC_WARFARE Engages in electronic warfare operations.   11
  EXPERIMENTAL Engages in experimental operations.   12
  FIGHTER Engages in aerial combat; fighter.   13
  OBSERVATION Makes observations and records phenomena with instruments.   14
  PASSENGER Carries passengers.   15
  PATROL Engages in patrol operations.   16
  RECONNAISSANCE Engages in reconnaissance operations.   17
  RESEARCH Engages in research operations.   18
  SCOUT Engages in scout operations.   19
  SEARCH_AND_RESCUE Engages in search and rescue operations.   20
  SPECIAL_ELECTRONIC Engages in special electronic operations.   21
  SPECIAL_OPERATIONS Engages in special military operations.   22
  STRIKE Engages in military <<<ATTACK>>>, assault, and/or strike operations.   23
  SURVEILLANCE Engages in surveillance operations.   24
  TANKER Transports liquids (for example: <PETROLEUM>) in bulk; tanker.   25
  TARGET Serves as a target for training exercises and/or experimentation.   26
  TRAINER Engages in training operations.   27
  TRANSPORT Transports <EQUIPMENT>, <HUMAN>s, and/or <SUPPLIES_AND_EXPENDABLES>.   28
  UTILITY Engages in utility operations.   29
AIRCRAFT_ICING_INTENSITY   The estimated intensity of the accumulation of <ICE> on exposed <SURFACE>s of an <AIRCRAFT> that is formed as the <AIRCRAFT> is flown through supercooled drops of <WATER> in <CLOUD>s and/or <PRECIPITATION>.    
  NO_ICING No icing.   1
  TRACE The rate of accumulation becomes perceptible; trace. The rate of accumulation is slightly greater than the rate of sublimation. It is not hazardous even though de-icing/anti-icing <EQUIPMENT> is not utilized unless encountered for an extended period of time (over 1 hour).   2
  TRACE_IN_CLOUD <<<TRACE>>> icing occurring in <CLOUD>s.   3
  TRACE_IN_PRECIP <<<TRACE>>> icing occurring in <PRECIPITATION>.   4
  LIGHT The rate of accumulation may create a problem if flight is prolonged in this environment (over 1 hour); light. Occasional use of de-icing/anti-icing <EQUIPMENT> removes/prevents accumulation. Icing does not present a problem if the de-icing/anti-icing <EQUIPMENT> is used.   5
  LIGHT_IN_CLOUD <<<LIGHT>>> icing occurring in <CLOUD>s.   6
  LIGHT_IN_PRECIP <<<LIGHT>>> icing occurring in <PRECIPITATION>.   7
  MODERATE The rate of accumulation is such that even short encounters become potentially hazardous; moderate. Use of de-icing/anti-icing <EQUIPMENT> and/or flight diversion is necessary.   8
  MODERATE_IN_CLOUD <<<MODERATE>>> icing occurring in <CLOUD>s.   9
  MODERATE_IN_PRECIP <<<MODERATE>>> icing occurring in <PRECIPITATION>.   10
  SEVERE The rate of accumulation is such that de-icing/anti-icing <EQUIPMENT> fails to reduce or control the hazard; severe. Immediate flight diversion is necessary.   11
  SEVERE_IN_CLOUD <<<SEVERE>>> icing occurring in <CLOUD>s.   12
  SEVERE_IN_PRECIP <<<SEVERE>>> icing occurring in <PRECIPITATION>.   13
AIRCRAFT_ICING_TYPE   The type of <ICE> that is expected to accumulate on the <SURFACE> of an <AIRCRAFT>.    
  CLEAR <ICE_GLAZE>; clear. Figure 6.36.75.1 1
  FROST <HOAR_FROST>. Figure 6.36.75.2 2
  MIXED Combination of <<<CLEAR>>>, <<<RIME>>>, and/or <<<FROST>>>; mixed. Figure 6.36.75.3 3
  NONE_PRESENT No icing is present; none present.   4
  RIME <RIME>.   5
AIRCRAFT_PROPULSION_TYPE   The type of propulsion of an <AIRCRAFT>.    
  ELECTRIC Using an electric motor.   1
  JET Using a means of jet propulsion.   2
  RECIPROCATING_ENGINE Using a piston or pistons moving up and down in cylinders; reciprocating engine.   3
  ROCKET Using a means of rocket propulsion.   4
  TURBOPROP Using a <<<JET>>> that also drives a propeller; turboprop.   5
AIRCRAFT_TURBULENCE_FREQUENCY   The rate of occurrence of turbulence experienced by <AIRCRAFT>; aircraft turbulence frequency.    
  CONTINUOUS Greater than two thirds of the time; continuous [AIM, Table 7-1-7:Continuous].   1
  FREQUENT Frequent.   2
  INFREQUENT Infrequent.   3
  INTERMITTENT Greater than or equal to one third of the time and less than or equal to two thirds of the time; intermittent [AIM, Table 7-1-7:Intermittent].   4
  NONE_OCCURRING None occurring.   5
  OCCASIONAL Less than one third of the time; occasional [AIM, Table 7-1-7:Occasional].   6
AIRCRAFT_TURBULENCE_INTENSITY   The intensity of turbulence experienced by <AIRCRAFT>.    
  NO_TURBULENCE No turbulence.   1
  LIGHT Turbulence that momentarily causes slight, erratic changes in <AIRCRAFT> altitude and/or attitude (pitch, roll, yaw) or turbulence that causes slight, rapid and somewhat rhythmic bumpiness without appreciable changes in <AIRCRAFT> altitude or attitude; light.   2
  LIGHT_TO_MODERATE Between <<<LIGHT>>> and <<<MODERATE>>>.   3
  MODERATE Turbulence that causes changes in <AIRCRAFT> altitude and/or attitude occurs but the <AIRCRAFT> remains in positive control at all times despite variations in indicated airspeed, or turbulence that is similar to <<<LIGHT>>> but of greater intensity, causing rapid bumps or jolts without appreciable changes in <AIRCRAFT> altitude or attitude; moderate.   4
  MODERATE_TO_SEVERE Between <<<MODERATE>>> and <<<SEVERE>>>.   5
  SEVERE Turbulence that causes large, abrupt changes in <AIRCRAFT> altitude and/or attitude, usually with large variations in indicated airspeed and possibly with momentary loss of control; severe.   6
  SEVERE_TO_EXTREME Between <<<SEVERE>>> and <<<EXTREME>>>.   7
  EXTREME Turbulence in which the <AIRCRAFT> is violently tossed about, and is practically impossible to control; extreme. Extreme turbulence may cause structural damage to the <AIRCRAFT>.   8
AIRCRAFT_TYPE   The type of an <AIRCRAFT>.    
  AIRSHIP <AIRSHIP>.   1
  AMPHIBIOUS Designed to take off and land on <WATERBODY>s; amphibious.   2
  BALLOON <BALLOON>.   3
  BLIMP <BLIMP>.   4
  DIRIGIBLE <DIRIGIBLE>.   5
  DRONE Pilotless and designed for remote control operation; drone.   6
  FIXED_WING Designed with fixed wings.   7
  GLIDER Designed to fly for long <<TIME_QUANTITY>>s without power; glider.   8
  LIGHT Designed with reduced range and payload, generally for private or light commercial use.   9
  ROTARY_WING Uses one or more aerofoils rotating in an approximately horizontal plane, providing all or most of the lift; rotary-wing [SOED, "rotary-wing"].   10
  SPACEPLANE Designed for limited flight in <SPACE>; spaceplane.   11
  STOL Designed for STOL operations.   12
  UNMANNED_AUTONOMOUS Designed for unmanned autonomous flight.   13
  VARIABLE_WING Designed with a variable position wing system for alteration of its shape to facilitate a wider range of performance.   14
  VTOL Designed for VTOL operations.   15
AIRSPACE_LIMITATION   The type of <AIRSPACE> wherein activities must be confined because of their nature and/or wherein limitations may be imposed upon <AIRCRAFT> operations.    
  AIR_EXERCISE Air exercise <REGION>.   1
  ALERT Alert <REGION>.   2
  ANIMAL_PROTECTION Permanent protection <REGION> containing wild <ANIMAL>s (especially <BIRD>s) and/or sensitive livestock.   3
  BIRD_BREEDING Temporary protection <REGION> supporting nesting and breeding of wild <BIRD>s.   4
  BIRD_HAZARD Hazards present due to <BIRD>s.   5
  BIRD_SANCTUARY A <REGION> where <BIRD>s are bred and protected; bird sanctuary.   6
  CAUTION Caution <REGION>.   7
  CONTROLLED_FIRING Controlled, firing <REGION>.   8
  DANGER Danger <REGION>.   9
  DEFENCE Defence <REGION>.   10
  GAS_VENTING_STATION Gas venting station.   11
  HAZARD_TO_AIRCRAFT Hazard to <AIRCRAFT>.   12
  HELICOPTER_PROTECTION Protection for <HELICOPTER>s.   13
  HIGH_INTENSITY_RADIO High-intensity radio transmissions in vicinity.   14
  INDUSTRIAL_HAZARDS Industrial hazards or <OBJECT>s needing protection.   15
  INTENSE_AIR_ACTIVITY Intense air activity <REGION>.   16
  LFLY_AVOIDANCE Low-flying avoidance <REGION>.   17
  LFLY_DEDICATED_USER Low-flying dedicated user area.   18
  LFLY_TACTICAL_TRAINING Low-flying tactical training area.   19
  MEDICAL Health resorts and/or medical establishments.   20
  MICROLIGHT_FLYING Intensive microlight or ultralight flying <REGION>.   21
  MILITARY_FLYING Military flying zone.   22
  MILITARY_OPERATIONS Military operations zone.   23
  NATURE_RESERVE <NATURE_RESERVE>, <PARK>, or conservation <REGION> to be avoided.   24
  NON_FREE_FLYING No free-flying.   25
  OPERATING Operating <REGION>.   26
  PARACHUTE_DROP_ZONE Parachute drop zone.   27
  PROHIBITED Prohibited <REGION>.   28
  PROHIBITED_VFR Prohibited - VFR.   29
  PROVOST_MARSHAL Limitations on use imposed by local military police under the direction of the Provost Marshal.   30
  RESTRICTED Restricted <REGION>.   31
  SPARSELY_SETTLED Sparsely settled <REGION>.   32
  TEMPORARY_RESERVED Temporary reserved <REGION>.   33
  TOWN_TO_BE_AVOIDED <TOWN> to be avoided.   34
  WARNING Warning <REGION>.   35
AIRSPACE_TYPE   The type of designated <AIRSPACE> within which some or all <AIRCRAFT> may be subject to air traffic control.    
  ACC The <REGION> associated with an ACC.   1
  ADVISORY The <REGION> within 16,09 kilometres (10 statute miles) of an <AERODROME> where a <CONTROL_TOWER> is not operating but where a FSS is located; advisory [AIM, Section 3-5-1.a Local Airport Advisory (AAA)]. At such <LOCATION>s, the FSS provides advisory service to arriving and departing <AIRCRAFT>.   2
  AERODROME_ADVISORY An advisory <REGION> for an <AERODROME>.   3
  AERODROME_CZ An aerodrome <<<CONTROL_ZONE>>>.   4
  AERODROME_RADAR_SERVICE A radar service <REGION> for an <AERODROME>.   5
  AERODROME_TRAFFIC_ZONE An Aerodrome Traffic Zone.   6
  AIR_DEFENCE_IDZ An Air Defence Identification Zone.   7
  AIR_TO_AIR_REFUELLING An air-to-air refuelling area/track/route.   8
  ALTIMETER_SETTING_REGION A geographical <REGION> for which the lowest value of QNH is forecast hourly and relayed by air traffic control centres; altimeter setting region.   9
  ARTCC The <REGION> associated with an ARTCC.   10
  ARTCC_SECTOR_DISCRETE A discrete sector of an ARTCC.   11
  BUFFER_ZONE A buffer zone.   12
  CADIZ A CADIZ.   13
  CCA A CCA.   14
  CONTROL_AREA A Control Area (CTA).   15
  CONTROL_ZONE A <CONTROLLED_AIRSPACE> extending upwards from ground level to a specified upper limit; a protected <AIRSPACE> surrounding an <AERODROME> bounded by a circle of 3,70 kilometres (2 nautical miles) or 4,63 kilometres (2,5 nautical miles) <<RADIUS>> (depending on <<LENGTH>> of <RUNWAY>) centred on the mid-point of the longest <RUNWAY>; control zone.   16
  CONTROLLED_AIRSPACE A <CONTROLLED_AIRSPACE>.   17
  CONTROLLED_VFR A controlled VFR.   18
  DEWIZ A DEWIZ.   19
  DEWMIZ A DEWMIZ.   20
  FIC_FSS The <REGION> associated with a FIC/FSS.   21
  FLIGHT_INR A <REGION> where a variety of flight information (but not flight control) is provided by specific Flight Information Centres; flight information region.
EXAMPLE     The United Kingdom has two flight information regions, London and Scottish.
  22
  FRENCH_PERIPHERAL_IDZ A French peripheral IDZ.   23
  KOREA_LIMITED_IDZ A Korea limited IDZ.   24
  LFLY_AREA A low-flying area.   25
  LFLY_DEDICATED_USER A dedicated user <<<LFLY_AREA>>>.   26
  LFLY_DIVIDING_LINE A dividing line in a <<<LFLY_AREA>>>.   27
  LFLY_FLOW_ARROW A flow arrow in a <<<LFLY_AREA>>>.   28
  LFLY_FLOW_CORRIDOR A flow corridor <BOUNDARY> in a <<<LFLY_AREA>>>.   29
  LFLY_SUB_BOUNDARY A <BOUNDARY_COMPONENT> of a <<<LFLY_AREA>>>; low-fly sub-boundary.   30
  LFLY_TACT_ROUTE A tactical route <BOUNDARY> in a <<<LFLY_AREA>>>.   31
  LFLY_TACT_TRAINING A tactical training <<<LFLY_AREA>>>.   32
  LFLY_WEATHER_CORRIDOR A weather corridor in a <<<LFLY_AREA>>>.   33
  MANDATORY_RADIO_AREA A mandatory radio area.   34
  MID_CANADA_IDZ A mid-Canada IDZ.   35
  MLTRY_ATZ A military ATZ.   36
  MLTRY_CLIMB_CORRIDOR A positive <CONTROLLED_AIRSPACE> of defined vertical and horizontal dimensions extending from a military <AERODROME>; military climb corridor [AR310, "military climb corridor"].   37
  MLTRY_COMMON_AREA_CONTROL The <REGION> associated with a MCAC.   38
  MLTRY_CTZ A protected <REGION> surrounding certain military <AERODROME>s that normally extends for a 9,26 kilometre (5 nautical mile) <<RADIUS>> around the <AERODROME> and upwards from the <SURFACE> to 914,4 metres (3 000 feet) above the level of the <AERODROME>; military control zone. A 'stub' projection protects the final approach path to the main <RUNWAY> outwards from the <BOUNDARY> of the MATZ, enclosing a <REGION> 1,852 kilometre (two nautical mile) either side of the extended centre-line of the <RUNWAY> and upwards from 304,8 metres (1 000 feet) above the <SURFACE> to 914,4 metres (3 000 feet) above the <<ELEVATION>> of the <AERODROME>. Although recognition of a MATZ is not mandatory for civil <AIRCRAFT>, all MATZ <AERODROME>s offer a penetration service to civil traffic during operational hours.   39
  MDTRY_RADAR_SERVICE_AREA A mandatory <<<RADAR_SERVICE_AREA>>>.   40
  MLTRY_SECTOR_CONTROL_CENTRE The <REGION> associated with a military sector control centre (SCC-AM).   41
  MLTRY_UPPER A military upper <REGION>.   42
  MOUNTAINOUS A designated <MOUNTAINOUS_REGION>.   43
  OCA A US FAA OCA.   44
  OCA_NON_FAA An OCA other than FAA; OCA non-FAA.   45
  POSITIVE_CONTROL_AREA A positive <<<CONTROL_AREA>>>.   46
  POSITIVE_CZ A positive <<<CONTROL_ZONE>>>.   47
  RADAR_AREA A radar area.   48
  RADAR_AREA_SECTOR_BOUNDARY A sector <BOUNDARY> of a <<<RADAR_AREA>>>.   49
  RADAR_SERVICE_AREA A radar service area.   50
  SAL_ENTRY A special access lane entry.   51
  SAL_EXIT A special access lane exit.   52
  SECURITY_IDZ A security IDZ.   53
  SPC_RULES_AREA A Special Rules Area (SRA).   54
  SPC_RULES_ZONE A protected <AIRSPACE> surrounding an <AERODROME> and extending from the <SURFACE> upwards to a specific level that affords safety to air traffic movements; Special Rules Zone (SRZ). Designated in the vicinity of <AERODROME>s when the traffic level does not warrant the establishment of a CZ.   55
  SUB_FLIGHT_INR A sub-flight INR.   56
  TERMINAL_CONTROL A <REGION> of <CONTROLLED_AIRSPACE> at the intersection of airways in the vicinity of control zones around major <AERODROME>s; terminal control.   57
  TERMINAL_RADAR_SERVICE_AREA A terminal <<<RADAR_SERVICE_AREA>>>.   58
  TRAFFIC_INZ A traffic INZ.   59
  TRAINING A <REGION> designated for training.   60
  TRANSITION_AREA A transition area.   61
  UNCONTROLLED_AIRSPACE <UNCONTROLLED_AIRSPACE>.   62
  UPPER_ADVISORY_AREA An upper advisory area.   63
  UPPER_AIRSPACE_CENTRES An upper airspace centres operational air traffic.   64
  UPPER_CONTROL_AREA An upper <<<CONTROL_AREA>>>.   65
  UPPER_FLIGHT_INR An upper <<<FLIGHT_INR>>>.   66
  VFR_SECTOR_BOUNDARY A VFR sector <BOUNDARY>.   67
  ZONE_OF_INTERIOR A zone of interior.   68
APERTURE_COVER_POSITION   The position of the covering (for example: a canopy and/or a hatch) of an <APERTURE>; aperture cover position.    
  CLOSED Completely closed.   1
  OPEN Completely open.   2
  OPEN_OCCUPANT_VISIBLE Fully open with the occupant visible.   3
  POPPED Partially open so that an occupant can see through small openings between the hatch and the <STRUCTURE> onto which it closes; popped.   4
  POPPED_OCCUPANT_VISIBLE Partially open with the occupant visible; popped occupant visible.   5
APERTURE_STATE   The state of closure of an <APERTURE>.    
  CLOSED_LOCKED Closed and locked.   1
  CLOSED_UNLOCKED Closed and unlocked.   2
  FASTENED_SHUT Fastened shut.
EXAMPLES     Nailed, screwed.
  3
  OPEN Open.   4
APRON_HARD_STANDING_FUNCTION   The function of an <APRON> or <HARD_STANDING>.    
  AIRCRAFT_HANGAR_APRON <APRON> associated with an <AIRCRAFT_HANGAR>.   1
  ALERT A military <APRON> or <HARD_STANDING>, usually collocated with a <TAXIWAY> with rapid access to one end of a <RUNWAY>, used by combat-ready <AIRCRAFT> prepared to take off on short notice; alert.   2
  BASE_FLIGHT_APRON An <APRON> on a military <AERODROME> that is used for support <AIRCRAFT>; base flight apron.   3
  COMPASS_ROSE A painted compass rose is present on the <SURFACE>, and is used as a reference to calibrate on-board compasses on <AIRCRAFT>.   4
  DEPOT_APRON An <APRON> collocated with airport cargo handling facilities; depot apron.   5
  DISPERSAL_HARD_STANDING A <HARD_STANDING> for a single military <AIRCRAFT> designed to isolate the damage suffered by one <AIRCRAFT> from spreading to others during an attack; dispersal hard standing.   6
  ENGINE_RUN_UP An <APRON> or <HARD_STANDING> where aircraft engines are occasionally pre-flight tested at high RPM; engine run-up.   7
  ENGINE_TEST_PAD Engine test pad (<APRON>).   8
  FIRING_IN Designed for the use of a single <FIGHTER_WINGED_AIRCRAFT> for zeroing-in and aligning forward-firing <WEAPON>s, located in a protected <REGION> opposite an <AERODROME_REVETMENT>; firing-in.   9
  MAINTENANCE An <APRON> or <HARD_STANDING> where maintenance on <AIRCRAFT> is performed.   10
  OPERATIONAL Used for the parking, marshalling, temporary storage, loading, or unloading of <AIRCRAFT>; operational.   11
  PAD Has been designated for aircraft engine run-up, tabbing, or power checks and that is usually situated near the ends of <RUNWAY>s; pad.   12
  PARKING Used for parking of <AIRCRAFT>.   13
  REFUELLING_HARD_STANDING Refuelling <HARD_STANDING>.   14
  STUB_APRON An <APRON> located on the short end of an abandoned <TAXIWAY>, <RUNWAY> or <RAMP>, or an <APRON> connected to a <RUNWAY> without the benefit of a <TAXIWAY>; stub.   15
  TRANSIENT_APRON An <APRON> where space has been set aside for use by visiting <AIRCRAFT>; transient apron.   16
AQUEDUCT_TYPE   The type of an <AQUEDUCT>.    
  CANAL <CANAL>.   1
  ELEVATED_FLUME Elevated on a suspended <FLUME>.   2
  FLUME <FLUME>.   3
  IRRIGATION_DITCH <IRRIGATION_DITCH>.   4
  ON_TERRAIN Built directly on the <TERRAIN>.   5
  QANAT Qanat.   6
  QANAT_SHAFT <<<QANAT>>> with one or more access shafts.   7
  SLUICE <SLUICE>.   8
  UNDERGROUND Underground.   9
ARRESTING_GEAR_TYPE   The type of <DEVICE> at the end of a <RUNWAY> that is used to stop <AIRCRAFT>; arresting gear type.    
  CABLE A <LOAD_CABLE> that spans a <RUNWAY> or a flight deck on a <VESSEL> and is engaged by the arresting hook on an <AIRCRAFT> [J1-02, "aircraft arresting cable"].
EXAMPLE     Aircraft arresting wire.
  1
  JET_BARRIER A <DEVICE>, other than a <<<CABLE>>>, that is designed to stop an <AIRCRAFT> by absorbing its forward momentum; jet barrier.   2
  NET The principal <BARRIER> is a net.   3
ASSAULT_LANDING_CRAFT_TYPE   The type of a <LANDING_CRAFT> designed for amphibious assault operations.    
  CHAHO_CLASS North Korea Chaho class <COMBAT_SUPPORT_VESSEL>.   1
  CHONG_JIN_CLASS North Korea Chong Jin class <COMBAT_SUPPORT_VESSEL>.   2
  KONGBANG_CLASS North Korea Kongbang class assault hovercraft.   3
  LCAC_CLASS US Navy LCAC.   4
  MOSKALENKO_CLASS Russia Mitrofan Moskalenko (Ivan Rogov class) multirole amphibious <VESSEL>.   5
  OCEAN_CLASS UK LPH01 Ocean class amphibious assault <HELICOPTER> carrier.   6
  POMORNIK_CLASS Russia Pomornik class large hovercraft.   7
  SIR_BEDIVERE_CLASS UK L3004 Sir Bedivere class with aft <HELICOPTER> deck.   8
  SIR_TRISTRAM_CLASS UK L3505 Sir Tristram class amphibious assault <VESSEL>.   9
  TARAWA_CLASS US Navy Tarawa class amphibious <COMBATANT_VESSEL>.   10
  WASP_CLASS US Navy Wasp class amphibious <COMBATANT_VESSEL>.   11
ASW_WINGED_AIRCRAFT_TYPE   The type of an <ASW_WINGED_AIRCRAFT>.    
  B_17G Boeing B-17 Flying Fortress.   1
  H_16 Curtiss H-16.   2
  HS_2L Curtiss HS-2L.   3
  MARS Martin Mars.   4
  NIMROD British Aerospace Nimrod.   5
  P_2 Lockheed P-2 Neptune.   7
  P_2Y Consolidated P2Y.   8
  P_3 Lockheed P-3 Orion.   6
  P_4M Martin P4M Mercator.   9
  P_5M Martin P5M Marlin.   10
  P_6M Martin P6M SeaMaster.   11
  PB_2Y_5 Consolidated PB2Y-5 Coronado.   12
  PB_4Y_1 Consolidated B-24 Liberator; PB4Y-1.   13
  PB_4Y_2 Consolidated PB4Y-2 Privateer.   14
  PBM Martin PBM Mariner.   15
  PBN_1 Naval Aircraft Factory PBN-1 Nomad.   16
  PBO_1 Lockheed PBO-1 Hudson.   17
  PBY Consolidated PBY Catalina.   18
  PM_1_2 Martin PM-1 and Martin PM-2.   19
  PV_1 Lockheed PV-1 Ventura.   20
  PV_2 Lockheed PV-2 Harpoon.   21
  R_4D_6 Douglas R4D-6 Skytrain.   22
  SB_2C Curtiss-Wright SB2C Helldiver.   23
  XP_5Y_1 Consolidated Vultee XP5Y-1.   24
ATM_CEILING_METHOD   The method used to determine the <<ATM_CEILING>>.    
  AIRCRAFT By observation of the <<HEIGHT_AGL>> of the base of the lowest <CLOUD> from an <AIRCRAFT>.   1
  BALLOON By observing the ascent of a balloon and the <<HEIGHT_AGL>> at which it disappears into the lowest <CLOUD>.   2
  ESTIMATED By estimating the <<HEIGHT_AGL>> of the base of the lowest <CLOUD>; estimated.   4
  LASER_CEILOMETER By measuring the <<TIME_QUANTITY>> taken for a pulse of coherent light to travel from a transmitter to the base of the lowest <CLOUD> and return to the receiver; laser ceilometer.   5
  MEASURED By measurement of the <<HEIGHT_AGL>> of the base of the lowest <CLOUD>.   6
  MODELLED By modelling, using numerical methods, the <<HEIGHT_AGL>> of the base of the lowest <CLOUD>; modelled.   7
  OBSCURATION_LIMIT By the reported <<HEIGHT_AGL>> limit of <<VISIBILITY_DISTANCE>> into a surface-based obscuration.   8
  RADAR By measuring the time taken for a radar pulse to travel from a transmitter to the base of the lowest <CLOUD> and return to the receiver.   9
  ROTATING_BEAM_CEILOMETER By measurement of the angle of elevation of a light beam scanning the vertical plane, at the instant at which a proportion of the light scattered by the base of the lowest <CLOUD> is received by a photoelectric cell directed vertically upwards at a known distance from the light source; rotating beam ceilometer.   10
  STATISTICALLY_DERIVED By deriving, using statistical methods, the <<HEIGHT_AGL>> of the base of the lowest <CLOUD>; statistically derived.   11
ATM_PRESSURE_CHANGE_QUALITY   The quality of an <<ATM_PRESSURE_CHANGE_TENDENCY_CATEGORY>> measurement.    
  GOOD The quality of the value was acceptable; good.   1
  NO_CHECK No check on the quality of the value was performed.   2
  SUSPECT The value may be in error; suspect.   3
  ERR_CORRECTED The original value was erroneous and was corrected.   4
  ERR_CORRECTION_SUSPECT <<<ERR_CORRECTED>>> but the corrected value may be in error; erroneous correction suspect.   5
  ERR The value is erroneous.   6
  MISS_SUBST <<<MISS>>>, so a substitute value was provided.   7
  MISS_SUBST_SUSPECT <<<MISS_SUBST>>>, but the substitute value may be in error; missing substitute suspect.   8
  MISS The value is missing.   9
ATM_PRESSURE_CHANGE_TENDENCY-
_CATEGORY
  The qualitative <<ATM_PRESSURE_CHANGE_3_HOUR>>; atmospheric pressure change tendency category.    
  INC_THEN_DEC Increasing then decreasing with <<ATM_PRESSURE>> the same or higher than 3 hours earlier.   1
  INC_THEN_STEADY Increasing then steady; or increasing then increasing more slowly; with <<ATM_PRESSURE>> higher than 3 hours earlier.   2
  INC_PRESSURE_HIGHER Steadily or unsteadily increasing with <<ATM_PRESSURE>> higher than 3 hours earlier.   3
  CHANGE_TO_INC Decreasing or steady, then increasing; or increasing then increasing more rapidly; with <<ATM_PRESSURE>> higher than 3 hours earlier.   4
  STEADY_PRESSURE_EQUAL Steady with <<ATM_PRESSURE>> the same as 3 hours earlier; steady pressure equal.   5
  DEC_THEN_INC Decreasing then increasing with <<ATM_PRESSURE>> the same or lower than 3 hours earlier.   6
  DEC_THEN_STEADY Decreasing then steady; or decreasing then decreasing more slowly; with <<ATM_PRESSURE>> lower than 3 hours earlier.   7
  DEC_PRESSURE_LESS Steadily or unsteadily decreasing with <<ATM_PRESSURE>> lower than 3 hours earlier.   8
  CHANGE_TO_DEC Steady or increasing, then decreasing; or decreasing, then decreasing more rapidly; with <<ATM_PRESSURE>> lower than 3 hours earlier.   9
ATM_PRESSURE_QUALITY   The quality of an <<ATM_PRESSURE>> measurement.    
  GOOD The quality of the value was acceptable; good.   1
  NO_CHECK No check on the quality of the value was performed.   2
  SUSPECT The value may be in error; suspect.   3
  ERR_CORRECTED The original value was erroneous and was corrected.   4
  ERR_CORRECTION_SUSPECT <<<ERR_CORRECTED>>> but the corrected value may be in error; erroneous correction suspect.   5
  ERR The value is erroneous.   6
  MISS_SUBST <<<MISS>>>, so a substitute value was provided.   7
  MISS_SUBST_SUSPECT <<<MISS_SUBST>>>, but the substitute value may be in error; missing substitute suspect.   8
  MISS The value is missing.   9
ATM_PROFILE_MEASUREMENT-
_TECHNIQUE
  The technique or method of collecting an <ATMOSPHERE_PROPERTY_SET> that is a series of measurements collected along a (roughly) vertical axis; atmospheric profile measurement technique.    
  AIRCRAFT Measured by an <AIRCRAFT> as it ascends or descends through the <ATMOSPHERE>.   1
  DROPSONDE <<<RADIOSONDE>>> launched from an <AIRCRAFT>, with or without a parachute; dropsonde.   2
  PILOT_BALLOON Measurement of upper <WIND>s by the optical tracking of a pilot balloon. A free balloon whose path while moving upwards is visually observed using a theodolite in order to measure upper <WIND>s.   3
  RADIOSONDE Measured by a <SENSOR> that is part of a meteorological instrument package, often borne aloft by a free-flight balloon, provided with a radio transmitter; radiosonde.   4
  ROCKETSONDE Measured by a <SENSOR> that is part of a meteorological instrument package that is carried aloft by rocket; rocketsonde.   5
  SATELLITE Remotely sensed from an <ARTIFICIAL_SATELLITE>.   6
  WIND_PROFILER Vertical profiles of the <WIND> are measured using Doppler radar operating in the VHF-UHF <<EM_BAND>> (30 megahertz-3 gigahertz) that determine the <<WIND_SPEED>> and <<WIND_DIRECTION>> by measuring the line-of-sight Doppler shift of scattered signals from refractive index fluctuations caused by turbulence; wind profiler.   7
ATM_TURBULENCE_TYPE   The type of turbulence in the <ATMOSPHERE> experienced by <AIRCRAFT>.    
  CLEAR_AIR In clear <AIR>.   1
  CLOUD In <CLOUD>.   2
  NO_TURBULENCE No turbulence is present.   3
  NOT_SPECIFIED Not specified.   4
ATM_VERTICAL_REFERENCE   The <SURFACE_DATUM> and accompanying method of reporting the vertical displacement to an <OBJECT> (for example: a level in an <ATMOSPHERE>) in an <ATMOSPHERE>; atmosphere vertical reference.    
  ICAO_STD_ATM The reference <SURFACE_DATUM> is at 1 013,25 hectoPascals in the ICAO standard atmosphere and the resulting measurement is reported as the <<PRESSURE_ALTITUDE>>.   1
  ICAO_STD_ATM_FLIGHT_LEVEL The reference <SURFACE_DATUM> is at 1 013,25 hectoPascals in the ICAO standard atmosphere and the resulting measurement is reported as an ICAO flight level.   2
  PLANETARY_SURFACE The reference <SURFACE_DATUM> is a <PLANETARY_SURFACE> and the resulting measurement is reported as the height.   3
  STATION_ALTIMETER_SETTING The reference <SURFACE_DATUM> is defined by the <<PRESSURE_ALTIMETER_SETTING>> and the resulting altimeter reading is reported as the indicated altitude; station altimeter setting.   4
  TRUE_ALTITUDE The reference <SURFACE_DATUM> is MSL and the resulting measurement is reported as the true altitude.   5
ATS_ROUTE_COMPONENT_LEVEL   The flight level of an <ATS_ROUTE_COMPONENT>.    
  ABOVE_195 Used above flight level 195 (nominally 5 950 metres, or 19 500 feet, although the actual flight level based on the standard atmosphere is slightly higher).   1
  BELOW_195 Used below flight level 195 (nominally 5 950 metres, or 19 500 feet, although the actual flight level based on the standard atmosphere is slightly higher).   2
  BOTH_195 Used both <<<ABOVE_195>>> and <<<BELOW_195>>>.   3
  ABOVE_245 Used above flight level 245 (nominally 7 500 metres, or 24 500 feet, although the actual flight level based on the standard atmosphere is slightly higher).   4
  BELOW_245 Used below flight level 245 (nominally 7 500 metres, or 24 500 feet, although the actual flight level based on the standard atmosphere is slightly higher).   5
  BOTH_245 Used both <<<ABOVE_245>>> and <<<BELOW_245>>>.   6
  NIGHT_LOW_FLYING Special <ROUTE> dedicated to night, low-flying use.   7
ATS_ROUTE_TYPE   The type of an <ATS_ROUTE>.    
  ADVISORY ATS provides advice and information for the safe conduct of flight and movement of <AIRCRAFT>; advisory [F7110.65, "ADVISORY SERVICE"].   1
  AIR_ROUTE A <<<CORRIDOR>>> pre-established by ATS for the safe conduct of flight and movement of <AIRCRAFT>; air route.   2
  AIRWAY A control <REGION> or portion thereof established in the form of a <<<CORRIDOR>>> equipped with radio <AID_TO_NAVIGATION>s; airway [F7110.65, "AIRWAY [ICAO]"].   3
  AREA_NAVIGATION A <REGION> permitting operation of <AIRCRAFT> on any desired course within the coverage of station-referenced navigation signals and/or within the limits of a self-contained system capability; area navigation [F7110.65, "AREA NAVIGATION (RNAV) [ICAO]"]. It is assigned by ATS upon pilot request.   4
  ATLANTIC An <AIRSPACE> over the Atlantic Ocean which requires specific filing and navigation procedures.   5
  BAHAMAS An <AIRSPACE> over the Bahamas which requires specific filing and navigation procedures.   6
  CANADIAN_CONTROL An <AIRSPACE> over Canada which requires specific filing and navigation procedures; Canadian control.   7
  CORRIDOR A corridor between two <AID_TO_NAVIGATION>s which includes the <CENTRE_LINE> of the corridor and the <AIRSPACE> up to 7,5 kilometres on either side of the <CENTRE_LINE> and altitudes between 350 and 7 500 metres above MSL.   8
  DIRECT A straight <LINE> between two identified <AID_TO_NAVIGATION>s; direct [F7110.65, "DIRECT"].   9
  HELICOPTER Designated for use by <HELICOPTER>s.   10
  HELICOPTER_MULTI_ENGINE A <<<HELICOPTER>>> route that does not allow traversal by single-engine <HELICOPTER>s; helicopter multi-engine.   11
  JET A high-altitude <<<AIRWAY>>> marked by longer-range transmitting VOR <AID_TO_NAVIGATION>s that enable it to be navigated by high-speed jet-powered <AIRCRAFT>.   12
  LOW_FLYING Assigned by ATS to low-flying <AIRCRAFT>.   13
  MILITARY An <AIRSPACE> reserved for military operations.   14
  NORTH_AMERICA An <AIRSPACE> over the North American continent that requires specific filing and navigation procedures.   15
  OCEANIC An <AIRSPACE> over the Pacific Ocean that requires specific filing and navigation procedures; oceanic.   16
  PURPLE_AIRWAY Designated as a "PURPLE AIRWAY" by an ATS.   17
  ROYAL_HELICOPTER Reserved for use by a <HELICOPTER> transporting royalty.   18
  ROYAL_LOW_LEVEL Reserved for low-level flying by an <AIRCRAFT> transporting royalty.   19
  SUBSTITUTE Assigned when any part of an <<<AIRWAY>>> or <ATS_ROUTE> is unusable because of <AID_TO_NAVIGATION>s status, consisting of:
a) substitute <ATS_ROUTE>s, which are shown on national government charts,
b) <ATS_ROUTE>s defined by ATC as specific <AID_TO_NAVIGATION> radials or courses, and
c) <ATS_ROUTE>s defined by ATC as direct to, or between, <AID_TO_NAVIGATION>s [F7110.65, "SUBSTITUTE ROUTE"].
  20
  TACAN Designated for use by an <AIRCRAFT>, normally military, possessing TACAN with DME but no VOR navigational system capability.   21
ATS_USE_TYPE   The type of use of a designated ATS <AIRSPACE>.    
  AERODROME_CZ Aerodrome <<<CZ>>>.   1
  AIR_DEFENCE_ADVISORY Advisory <REGION>, air defence.   2
  AIR_DEFENCE_IDZ Air defence IDZ.   3
  AIRPORT_ADVISORY Airport advisory <REGION>.   4
  AIRPORT_RADAR_SERVICE Airport radar service <REGION>.   5
  AIRPORT_TRAFFIC Airport traffic <REGION>.   6
  ALTIMETER_CHANGE_BOUNDARY Altimeter change <BOUNDARY>.   7
  AREA_CONTROL Area control centre.   8
  ARTCC Air route traffic control centre.   9
  ARTCC_SECTOR Air route traffic control centre sector or discrete.   10
  BERLIN_CZ Berlin <<<CZ>>>.   11
  BUFFER_ZONE Buffer zone.   12
  CANADIAN_AIR_DEFENCE_IDZ Canadian air defence IDZ.   13
  CLASS_C_CZ Class C CZ.   14
  CONTINENTAL_CONTROL Continental <<<CONTROL_REGION>>>.   15
  CONTROL_REGION Control <REGION>.   16
  CONTROL_VFR Controlled VFR.   17
  CONTROLLED_AIRSPACE <CONTROLLED_AIRSPACE>.   18
  CZ CZ.   19
  CZ_NO_FIXED_WING <<<CZ>>> and no fixed wing special visual flight rules permitted.   20
  DEW_EAST_MLTRY_IDZ DEW East military identification zone.   21
  DEWIZ DEWIZ.   22
  FLIGHT_INR Flight INR.   23
  FRENCH_PERIPHERAL_IDZ French peripheral IDZ.   24
  ICAO ICAO.   25
  KOREA_LIMITED_IDZ Korea limited IDZ.   26
  LOW_FLYING Low-flying <REGION>.   27
  MID_CANADA_IDZ Mid-Canada IDZ.   28
  MLTRY_AERODROME_TZ Military aerodrome TZ.   29
  MLTRY_CLIMB_CORRIDOR Military climb corridor.   30
  MLTRY_COMMON_REGION_CONTROL Military common region control.   31
  MLTRY_TERMINAL_CZ Military terminal CZ.   32
  MLTRY_UPPER_CZ Military upper CZ.   33
  MOUNTAINOUS Designated <MOUNTAINOUS_REGION>.   34
  OCA_FAA US FAA OCA.   35
  OCA_NON_FAA OCA other than FAA; OCA non-FAA.   36
  POSITIVE_CONTROL_REGION Positive <<<CONTROL_REGION>>>.   37
  POSITIVE_CZ Positive <<<CZ>>>.   38
  RADAR_REGION Radar <REGION>.   39
  RADAR_SECTOR The sector <BOUNDARY> of a <<<RADAR_REGION>>>.   40
  REFUELLING A course used while refuelling an <AIRCRAFT> during flight.   41
  REFUELLING_OR_TRACK <<<REFUELLING>>> and/or <<<TRACK>>>.   42
  SECURITY_IDZ Security IDZ.   43
  SPECIAL_AIR_TRAFFIC_RULES Special air traffic rules <REGION>.   44
  SPECIAL_OPERATIONS Special operations <REGION>.   45
  SPECIAL_RULES_ZONE Special rules zone.   46
  SPECIAL_USE_AIRSPACE <SPECIAL_USE_AIRSPACE>.   47
  SUB_FLIGHT_INR Sub-flight INR.   48
  TERMINAL_CONTROL Terminal control <REGION>.   49
  TERMINAL_RADAR_SERVICE Terminal radar service <REGION>.   50
  TRACK Track.   51
  TRAFFIC_INZ Traffic INZ.   52
  TRANSITION Transition <REGION>; for chart use only.   53
  UNCONTROLLED <UNCONTROLLED_AIRSPACE>.   54
  UPPER_ADVISORY_REGION Upper advisory <REGION>.   55
  UPPER_AIRSPACE_CENTRE Upper airspace centres, operational air traffic.   56
  UPPER_CONTROL_REGION Upper <<<CONTROL_REGION>>>.   57
  UPPER_FLIGHT_INR Upper <<<FLIGHT_INR>>>.   58
  ZONE_OF_INTERIOR Zone of interior.   59
ATTACK_WINGED_AIRCRAFT_TYPE   The type of an <ATTACK_WINGED_AIRCRAFT>.    
  A_1 A-1 "Skyraider", manufactured by Douglas.   1
  A_2 A-2 "Savage", manufactured by North American.   2
  A_3 A-3 "Skywarrior", manufactured by Douglas.   3
  A_4 A-4 "Skyhawk", manufactured by Douglas.   4
  A_5 A-5 "Vigilante", manufactured by North American.   5
  A_6 A-6 "Intruder", manufactured by Grumman.   6
  A_7 A-7 "Corsair" and "Corsair II", manufactured by LTV.   7
  A_9 A-9, manufactured by Northrop.   8
  A_10 A-10 "Thunderbolt" and "Thunderbolt II", manufactured by Fairchild Republic.   9
  A_12 A-12 "Avenger", manufactured by General Dynamics/McDonnell Douglas.   10
  A_26 A-26 "Counter Invader", manufactured by Douglas.   11
  A_37 A-37 "Dragonfly", manufactured by Cessna YA-37A.   12
  AC_47 AC-47 "Spooky", manufactured by Douglas.   13
  AC_119 AC-119G "Shadow" or AC-119K "Stinger", manufactured by Fairchild.   14
  AC_130 AC-130 "Spectre", manufactured by Lockheed.   15
  AU_23 AU-23 "Peacemaker", manufactured by Fairchild.   16
  AU_24 AU-24 "Stallion", manufactured by Helio.   17
  AV_8 AV-8 "Harrier", manufactured by McDonnell Douglas.   18
AUXILIARY_VESSEL_TYPE   The type of a <WATER_SURFACE_VESSEL> designed for auxiliary operations.    
  APPLELEAF_CLASS_TANKER An Appleleaf Class support tanker <VESSEL>. A <VESSEL> of this class has approximate dimensions: 170 by 26 metres.   1
  BULLDOG_CLASS_SURVEY A Bulldog Class coastal survey <VESSEL>. A <VESSEL> of this class has approximate dimensions: 61 by 35 metres.   2
  FORT_GRANGE_CLASS_COMBAT-
_SUPPORT
A Fort Grange Class <COMBAT_SUPPORT_VESSEL>. A <VESSEL> of this class has approximate dimensions: 184 by 24 metres.   3
  FORT_VICTORIA_CLASS_CARGO A Fort Victoria Class multi-product <COMBAT_SUPPORT_VESSEL>. A <VESSEL> of this class has approximate dimensions: 204 by 29 metres.   4
  HECLA_CLASS_SURVEY A Hecla Class hydrographic survey <VESSEL> also used for patrol and/or mine countermeasures. A <VESSEL> of this class has approximate dimensions: 80 by 15 metres.   5
  MOORHEN_CLASS_SALVAGE A Moorhen Class salvage and mooring <VESSEL> designed for operating as a mooring <TENDER>, experiment support craft, and/or lifting craft. A <VESSEL> of this class has approximate dimensions: 32 by 12 metres.   6
  ROEBUCK_CLASS_SURVEY A Roebuck Class surveying <VESSEL>. A <VESSEL> of this class has approximate dimensions: 64 by 13 metres.   7
  ROVER_CLASS_OILER A Rover Class small oiler <VESSEL> designed for supporting distant stations. A <VESSEL> of this class has approximate dimensions: 140 by 19 metres.   8
  SAL_CLASS_MOORING A Sal Class mooring <VESSEL> designed with large lifting abilities for mooring, <BUOY>, net tenders, major salvage, dive support and firefighting capabilities. A <VESSEL> of this class has approximate dimensions: 77 by 15 metres.   9
  STENA_CLASS_REPAIR A Stena Class forward repair <VESSEL> designed for open-ocean salvage. A <VESSEL> of this class has approximate dimensions: 111 by 21 metres.   10
  TORNADO_CLASS_TORPEDO_RECOVERY A Tornado Class torpedo recovery <VESSEL>. A <VESSEL> of this class has approximate dimensions: 48 by 9 metres.   11
AVAILABLE_FACILITIES_TYPE   The type of facilities available at, or in the near vicinity of, a <HARBOUR> or marina.    
  BOAT_LIFT <BOAT_LIFT>.   1
  BOAT_RAMP Boat ramp.   2
  BOTTLE_GAS Provides bottled or liquefied petroleum gas.   3
  CAMPGROUND <CAMPGROUND>.   4
  CHANDLER A dealer in supplies for <VESSEL>s; chandler.   5
  DESALINATION <EQUIPMENT> for desalination.   6
  ELECTRICITY A connection to an electrical supply.   7
  EMERGENCY_TELEPHONE A <TELEPHONE> for emergency use only.   8
  FRESH_WATER Fresh <WATER>.   9
  FUEL_STATION A fuel station.   10
  HEALTH_OFFICE <HEALTH_OFFICE>.   11
  HELIPAD An improved <SURFACE> used for take-off, and landing, by <HELICOPTER>s and other VTOL <AIRCRAFT>; helipad.   12
  HOTEL <HOTEL>.   13
  LAUNDERETTE Launderette.   14
  MARINE_POLICE_STATION <MARINE_POLICE_STATION>.   15
  NAUTICAL_CLUB <NAUTICAL_CLUB>.   16
  NONE_AVAILABLE None available.   17
  PARKING_FOR_BOATS A place on <SHORE> where boats and/or trailers may be parked.   18
  PHARMACY Pharmacy.   19
  PICNIC_TRACT <PICNIC_TRACT>.   20
  POSTBOX Postbox.   21
  PROVISIONS A <MARKET> where food and other such supplies are available; provisions.   22
  PUBLIC_INN <PUBLIC_INN>.   23
  PUBLIC_TELEPHONE <PUBLIC_TELEPHONE>.   24
  PUBLIC_TOILET Toilets are available for public use.   25
  RECREATIONAL_VEHICLE_PARK A <VEHICLE_LOT> where recreational <VEHICLE>s may be parked and/or where recreational <VEHICLE> accommodation is provided.   26
  REFUSE_BIN <REFUSE_BIN>.   27
  REPAIR_BUILDING <REPAIR_BUILDING>.   28
  RESTAURANT <RESTAURANT>.   29
  SAILMAKER Sail manufacture and/or repair; sailmaker.   30
  SCRUBBING_BERTH A <VESSEL_BERTH> designed for careening; scrubbing berth.   31
  SECURITY A security service patrols and/or provides a secure lockup.   32
  SEWAGE_PUMP_OUT <PUMP_OUT_FACILITY>.   33
  SHIPYARD <SHIPYARD>.   34
  SHOWER A shower.   35
  TICKET_SALE Tickets may be purchased; ticket sale.   36
  VEHICLE_LOT <VEHICLE_LOT>.   37
  VISITORS_BERTH Temporary <VESSEL_BERTH> for visiting <VESSEL>s; visitors berth.   38
  VISITORS_MOORING Temporary mooring for visiting <VESSEL>s; visitors mooring.   39
AVERAGING_PERIOD_CATEGORY   A category describing the <<AVERAGING_PERIOD>>.    
  ONE_SECOND One second.   1
  TWO_SECONDS Two seconds.   2
  FIVE_SECONDS Five seconds.   3
  TEN_SECONDS Ten seconds.   4
  FIFTEEN_SECONDS Fifteen seconds.   5
  THIRTY_SECONDS Thirty seconds.   6
  ONE_MINUTE One minute.   7
  TWO_MINUTES Two minutes.   8
  FIVE_MINUTES Five minutes.   9
  TEN_MINUTES Ten minutes.   10
  FIFTEEN_MINUTES Fifteen minutes.   11
  THIRTY_MINUTES Thirty minutes.   12
  ONE_HOUR One hour.   13
  TWO_HOURS Two hours.   14
  THREE_HOURS Three hours.   15
  FOUR_HOURS Four hours.   16
  SIX_HOURS Six hours.   17
  EIGHT_HOURS Eight hours.   18
  TWELVE_HOURS Twelve hours.   19
  TWENTY_FOUR_HOURS Twenty-four hours.   20
AVIATION_LOCATION_ID_VALUE_SET   The value set of a formatted <<AVIATION_LOCATION_IDENTIFIER>>.    
  ICAO A specific location identifier, formatted in a Basic Latin string as specified in [I7910, Encode table].   2
  UNCONSTRAINED A Basic Latin string whose contents are not further constrained; unconstrained.   1
  US_FAA A specific location identifier, formatted in a Basic Latin string as specified in [F7350]; US FAA.   3
AVIATION_WAYPOINT_TYPE   The type of an <AVIATION_WAYPOINT>.    
  AERODROME <AERODROME>.   1
  ATC_COMPULSORY ATC compulsory.   2
  BACK_COURSE_MARKER Back course marker.   3
  DME_FIX DME fix.   4
  END_CONTINUOUS_AIRWAY End of continuous airway procedure.   5
  ESSENTIAL Essential.   6
  FAN_MARKER Fan marker.   7
  FINAL_APPROACH_COURSE_FIX A bearing, radial, or track of an instrument approach leading to a <RUNWAY> or an extended centre-line of the <RUNWAY> all without regard to distance; final approach course fix [F7110.65, "FINAL APPROACH COURSE"].   8
  FINAL_APPROACH_FIX The fix from which the final approach (IFR) to an <AERODROME> is executed and which identifies the beginning of the final approach segment [F7110.65, "FINAL APPROACH FIX"].   9
  FIRST_LEG_MISSED_APPROACH The first leg of a missed approach.   10
  GATEWAY_FIX The fix at which an <AIRCRAFT> enters a <SPECIAL_USE_AIRSPACE>; gateway fix.   11
  HOLDING_FIX A specified fix identifiable to a pilot by <AID_TO_NAVIGATION>s or visual reference to the <LAND> used as a reference point in establishing and maintaining the position of an <AIRCRAFT> while holding [F7110.65, "HOLDING FIX"].   12
  INITIAL_APPROACH_FIX Initial approach fix.   13
  INNER_MARKER Inner marker.   14
  MIDDLE_MARKER Middle marker.   15
  MISSED_APPROACH_POINT A <LOCATION> prescribed in each IFR approach procedure at which a missed approach procedure shall be executed if the required visual reference does not exist; missed approach point [F7110.65, "MISSED APPROACH POINT"].   16
  NON_ESSENTIAL Non-essential.   17
  OFF_AIRWAY Off-airway.   18
  OUTER_MARKER Outer marker.   19
  RUNWAY Runway.   20
  RUNWAY_END_COORDINATE Runway end coordinate.   21
  TRANSITION_ESSENTIAL Transition-essential.   22
  UNCHARTED_AIRWAY_INTERSECT Uncharted airway intersection.   23
  VOR_VORDME_VORTAC A <LOCATION> along a <ROUTE> where services from an <AID_TO_NAVIGATION> providing VOR azimuth, TACAN azimuth, and TACAN DME from one source become available.   24