AwySegAlt

Airway segment altitude data including MEA, MOCA, MCA, MRA, and MAA for each segment between points on an airway

Source: NASRTable: AWY_SEG_ALTVersion: e25086c3e952 (effective 2026-04-16)

Ordered by AWY_ID, AWY_LOCATION, POINT_SEQ. Unique key: AWY_ID, AWY_LOCATION, FROM_POINT. Designed to replace legacy ATS.txt and AWY.txt Subscriber Files.

Example query

# Introspect the AwySegAlt type in GraphiQL at https://api.nav.sortie.co/graphql
# Example shape (pair with a compatible root query field):
{
  # ...rootQuery... {
    effDate
    regulatory
    awyLocation
    awyId
  # }
}

Run at https://api.nav.sortie.co/graphql — GraphiQL is available in-browser.

Fields (47)

Field	Type	Description	Units	Enum
effDate ← EFF_DATE	String	The 28 Day NASR Subscription Effective Date in format YYYY/MM/DD
regulatory ← REGULATORY	ContrFuelAvbl	Identifies Airways published under 14 CFR (Code of Federal Regulation) Part-71 and Part-95		Y — Regulatory airway published under 14 CFR Part-71 and Part-95 N — Non-regulatory airway
awyLocation ← AWY_LOCATION	AwyLocation	Airway Type identifying the General Location of the Airway		A — ALASKA AIRWAY H — HAWAII AIRWAY C — U.S. CONTIGUOUS AIRWAY
awyId ← AWY_ID	String	Airway Identifier
pointSeq ← POINT_SEQ	Int	Sequencing number in multiples of ten; points are in the order adapted for the given Airway
fromPoint ← FROM_POINT	String	NAVAID Facility Identifier, FIX Name, or Border crossing. A unique system-generated number is added to each Border crossing Segment Value.
fromPtType ← FROM_PT_TYPE	FromPtType	NAVAID Facility or FIX Type identifying the type of the FROM_POINT		21 values CN — COMPUTER NAVIGATION FIX MR — MILITARY REPORTING POINT MW — MILITARY WAYPOINT NRS — NRS WAYPOINT RADAR — RADAR RP — REPORTING POINT VFR — VFR WAYPOINT WP — WAYPOINT CONSOLAN — A Low Frequency Long-Distance NAVAID Used Principally for Transoceanic Navigation DME — Distance Measuring Equipment only FAN MARKER — En Route Marker Beacon used to provide positive identification of positions at definite points along airways MARINE NDB — A Non-Directional Beacon used primarily for Marine surface Navigation MARINE NDB/DME — A Non-Directional Beacon with associated Distance Measuring Equipment used primarily for Marine Navigation NDB — A Non-Directional Beacon NDB/DME — Non-Directional Beacon with associated Distance Measuring Equipment TACAN — A Tactical Air Navigation System providing Azimuth and Slant Range Distance UHF/NDB — Ultra High Frequency/Non-Directional Beacon VOR — A VHF Omni-Directional Range providing Azimuth only VORTAC — A facility consisting of VOR and TACAN components providing VOR Azimuth, TACAN Azimuth, and TACAN Distance at one site VOR/DME — VHF Omni-Directional Range with associated Distance Measuring Equipment VOT — A FAA VOR Test Facility
navName ← NAV_NAME	String	NAVAID Facility Name
navCity ← NAV_CITY	String	The NAVAID Facility City which is part of the key for all NAV_*.csv files
artcc ← ARTCC	Artcc	Identifier of Low ARTCC Altitude Boundary that the FROM_POINT FIX/NAVAID Falls Within		31 values ZAB — Albuquerque ARTCC ZAK — Oakland Oceanic ARTCC ZAN — Anchorage ARTCC ZAU — Chicago ARTCC ZBW — Boston ARTCC ZDC — Washington ARTCC ZDV — Denver ARTCC ZFW — Fort Worth ARTCC ZHN — Honolulu ARTCC ZHU — Houston ARTCC ZID — Indianapolis ARTCC ZJX — Jacksonville ARTCC ZKC — Kansas City ARTCC ZLA — Los Angeles ARTCC ZLC — Salt Lake City ARTCC ZMA — Miami ARTCC ZME — Memphis ARTCC ZMP — Minneapolis ARTCC ZNY — New York ARTCC ZOA — Oakland ARTCC ZOB — Cleveland ARTCC ZQM — Special Use ARTCC ZSE — Seattle ARTCC ZSU — San Juan ARTCC ZTL — Atlanta ARTCC ZUA — Guam ARTCC ZUL — Monterrey ARTCC ZVR — Vancouver ARTCC ZWG — Winnipeg ARTCC ZWY — Winnipeg ARTCC ZYZ — Toronto ARTCC
icaoRegionCode ← ICAO_REGION_CODE	IcaoRegionCode	Two letter ICAO Region Code for FIX Point Types only		20 values CY — Canada K — Contiguous United States K1 — Contiguous United States region 1 K2 — Contiguous United States region 2 K3 — Contiguous United States region 3 K4 — Contiguous United States region 4 K5 — Contiguous United States region 5 K6 — Contiguous United States region 6 K7 — Contiguous United States region 7 MD — Dominican Republic MM — Mexico MY — Bahamas P — North Pacific PA — Alaska PG — Guam/Mariana Islands PH — Hawaii TI — U.S. Virgin Islands TJ — Puerto Rico TN — Netherlands Antilles UH — Russia Far East
stateCode ← STATE_CODE	AwySegAltStateCode	Associated State Post Office Code standard two letter abbreviation for US States and Territories		58 values AK — Alaska AL — Alabama AR — Arkansas AZ — Arizona CA — California CO — Colorado CT — Connecticut DC — District of Columbia DE — Delaware FL — Florida GA — Georgia GU — Guam HI — Hawaii IA — Iowa ID — Idaho IL — Illinois IN — Indiana KS — Kansas KY — Kentucky LA — Louisiana MA — Massachusetts MD — Maryland ME — Maine MI — Michigan MN — Minnesota MO — Missouri MP — Northern Mariana Islands MS — Mississippi MT — Montana NC — North Carolina ND — North Dakota NE — Nebraska NH — New Hampshire NJ — New Jersey NM — New Mexico NV — Nevada NY — New York OA — Ocean Area OG — Ocean Area Gulf OH — Ohio OK — Oklahoma OP — Ocean Area Pacific OR — Oregon PA — Pennsylvania PR — Puerto Rico RI — Rhode Island SC — South Carolina SD — South Dakota TN — Tennessee TX — Texas UT — Utah VA — Virginia VI — U.S. Virgin Islands VT — Vermont WA — Washington WI — Wisconsin WV — West Virginia WY — Wyoming
countryCode ← COUNTRY_CODE	AwySegAltCountryCode	Country Post Office Code		14 values AG — Antigua and Barbuda AN — Netherlands Antilles BM — Bermuda BS — Bahamas CA — Canada DO — Dominican Republic FM — Federated States of Micronesia IB — Cuba MH — Marshall Islands MX — Mexico PW — Palau RU — Russia TC — Turks and Caicos Islands US — United States
toPoint ← TO_POINT	String	The To Point that directly follows the current From Point on an individual segment
magCourse ← MAG_COURSE	Float	Segment Magnetic Course	degrees
oppMagCourse ← OPP_MAG_COURSE	Float	Segment Magnetic Course in the Opposite Direction	degrees
magCourseDist ← MAG_COURSE_DIST	Float	Distance to Next Point in Segment	nautical miles
chgovrPt ← CHGOVR_PT	String	NAVAID Changeover Point Facility Identifier
chgovrPtName ← CHGOVR_PT_NAME	String	NAVAID Changeover Point Facility Name
chgovrPtDist ← CHGOVR_PT_DIST	Int	Distance of the Changeover Point from this NAVAID Facility to the Next NAVAID Facility when the Changeover Point is more than one mile from the halfway point	nautical miles
awySegGapFlag ← AWY_SEG_GAP_FLAG	ContrFuelAvbl	Airway Gap Flag Indicator for when Airway is Discontinued		Y — Airway discontinued / gap present N — No airway gap
signalGapFlag ← SIGNAL_GAP_FLAG	ContrFuelAvbl	Gap in Signal Coverage Indicator for when MEA is established with a gap in Navigation Signal Coverage		Y — Gap in signal coverage exists N — No gap in signal coverage
dogleg ← DOGLEG	ContrFuelAvbl	A Turn Point Not At A NAVAID. GPS RNAV Routes (Q, T, TK) will have Dogleg=Y at First Point, End Point, and all Turn Points in between.		Y — Turn point not at a NAVAID (dogleg) N — No dogleg
nextMeaPt ← NEXT_MEA_PT	String	The To MEA_PT that directly follows the From MEA_PT for an individual Altitude record
minEnrouteAlt ← MIN_ENROUTE_ALT	Int	Point To Point Minimum Enroute Altitude (MEA)	feet MSL
minEnrouteAltDir ← MIN_ENROUTE_ALT_DIR	DdIruMeaDir	Point To Point Minimum Enroute Direction (MEA) when directional MEA applies		8 values E BND — Eastbound N BND — Northbound NE BND — Northeastbound NW BND — Northwestbound S BND — Southbound SE BND — Southeastbound SW BND — Southwestbound W BND — Westbound
minEnrouteAltOpposite ← MIN_ENROUTE_ALT_OPPOSITE	Int	Point To Point Minimum Enroute Altitude (MEA) in the Opposite Direction	feet MSL
minEnrouteAltOppositeDir ← MIN_ENROUTE_ALT_OPPOSITE_DIR	DdIruMeaDir	Point To Point Minimum Enroute Direction (MEA) for the Opposite Direction		8 values E BND — Eastbound N BND — Northbound NE BND — Northeastbound NW BND — Northwestbound S BND — Southbound SE BND — Southeastbound SW BND — Southwestbound W BND — Westbound
gpsMinEnrouteAlt ← GPS_MIN_ENROUTE_ALT	Int	Point To Point GNSS Minimum Enroute Altitude (Global Navigation Satellite System MEA)	feet MSL
gpsMinEnrouteAltDir ← GPS_MIN_ENROUTE_ALT_DIR	DdIruMeaDir	Point To Point GNSS Minimum Enroute Direction (Global Navigation Satellite System MEA) when directional GPS MEA applies		8 values E BND — Eastbound N BND — Northbound NE BND — Northeastbound NW BND — Northwestbound S BND — Southbound SE BND — Southeastbound SW BND — Southwestbound W BND — Westbound
gpsMinEnrouteAltOpposite ← GPS_MIN_ENROUTE_ALT_OPPOSITE	Int	Point To Point GNSS Minimum Enroute Altitude (Global Navigation Satellite System MEA) in the Opposite Direction	feet MSL
gpsMeaOppositeDir ← GPS_MEA_OPPOSITE_DIR	DdIruMeaDir	Point To Point GNSS Minimum Enroute Direction (Global Navigation Satellite System MEA) for the Opposite Direction		8 values E BND — Eastbound N BND — Northbound NE BND — Northeastbound NW BND — Northwestbound S BND — Southbound SE BND — Southeastbound SW BND — Southwestbound W BND — Westbound
ddIruMea ← DD_IRU_MEA	Int	Point To Point DME/DME/IRU Minimum Enroute Altitude (MEA)	feet MSL
ddIruMeaDir ← DD_IRU_MEA_DIR	DdIruMeaDir	Point To Point DME/DME/IRU Minimum Enroute Direction (MEA) when directional DD/IRU MEA applies		8 values E BND — Eastbound N BND — Northbound NE BND — Northeastbound NW BND — Northwestbound S BND — Southbound SE BND — Southeastbound SW BND — Southwestbound W BND — Westbound
ddIMeaOpposite ← DD_I_MEA_OPPOSITE	Int	Point To Point DME/DME/IRU Minimum Enroute Altitude (MEA) in the Opposite Direction	feet MSL
ddIMeaOppositeDir ← DD_I_MEA_OPPOSITE_DIR	DdIruMeaDir	Point To Point DME/DME/IRU Minimum Enroute Direction (MEA) for the Opposite Direction		8 values E BND — Eastbound N BND — Northbound NE BND — Northeastbound NW BND — Northwestbound S BND — Southbound SE BND — Southeastbound SW BND — Southwestbound W BND — Westbound
minObstnClncAlt ← MIN_OBSTN_CLNC_ALT	Int	Point To Point Minimum Obstruction Clearance Altitude (MOCA)	feet MSL
minCrossAlt ← MIN_CROSS_ALT	Int	Minimum Crossing Altitude (MCA)	feet MSL
minCrossAltDir ← MIN_CROSS_ALT_DIR	DdIruMeaDir	Minimum Crossing Direction (MCA) when directional MCA applies		8 values E BND — Eastbound N BND — Northbound NE BND — Northeastbound NW BND — Northwestbound S BND — Southbound SE BND — Southeastbound SW BND — Southwestbound W BND — Westbound
minCrossAltNavPt ← MIN_CROSS_ALT_NAV_PT	String	Minimum Crossing Altitude (MCA) Point identifier at which the MCA applies
minCrossAltOpposite ← MIN_CROSS_ALT_OPPOSITE	Int	Minimum Crossing Altitude (MCA) in the Opposite Direction	feet MSL
minCrossAltOppositeDir ← MIN_CROSS_ALT_OPPOSITE_DIR	DdIruMeaDir	Minimum Crossing Direction (MCA) for the Opposite Direction		8 values E BND — Eastbound N BND — Northbound NE BND — Northeastbound NW BND — Northwestbound S BND — Southbound SE BND — Southeastbound SW BND — Southwestbound W BND — Westbound
minRecepAlt ← MIN_RECEP_ALT	Int	FIX Minimum Reception Altitude (MRA)	feet MSL
maxAuthAlt ← MAX_AUTH_ALT	Int	Point To Point Maximum Authorized Altitude (MAA)	feet MSL
meaGap ← MEA_GAP	MeaGap	Identifies whether a given Airway Segment is Unusable or contains No MEA information		U — Airway segment is unusable N — No MEA information for this segment
reqdNavPerformance ← REQD_NAV_PERFORMANCE	Float	Required Navigation Performance (RNP) value for the airway segment
remark ← REMARK	String	Remark Text (Free Form Text that further describes a specific Information Item)