IlsBase

Base ILS localizer data including system type, ownership, location, frequency, and operational status

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

Ordered by SITE_NO, SITE_TYPE_CODE, RWY_END_ID. This combination is also the unique record key.

Example query

# Introspect the IlsBase type in GraphiQL at https://api.nav.sortie.co/graphql
# Example shape (pair with a compatible root query field):
{
  # ...rootQuery... {
    effDate
    siteNo
    siteTypeCode
    stateCode
  # }
}

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

Fields (36)

Field	Type	Description	Units	Enum
effDate ← EFF_DATE	String	The 28 Day NASR Subscription Effective Date in format YYYY/MM/DD
siteNo ← SITE_NO	String	Landing Facility Site Number. A unique identifying number. References the landing facility.
siteTypeCode ← SITE_TYPE_CODE	SiteTypeCode	Landing Facility Type Code		A — AIRPORT B — BALLOONPORT C — SEAPLANE BASE G — GLIDERPORT H — HELIPORT U — ULTRALIGHT
stateCode ← STATE_CODE	IlsBaseStateCode	Associated State Post Office Code, standard two letter abbreviation for US States and Territories		56 values AK — Alaska AL — Alabama AR — Arkansas AS — American Samoa 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 OH — Ohio OK — Oklahoma 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 — Virgin Islands VT — Vermont WA — Washington WI — Wisconsin WV — West Virginia WY — Wyoming
arptId ← ARPT_ID	String	Location Identifier. Unique 3-4 character alphanumeric identifier assigned to the Landing Facility
city ← CITY	String	Associated City Name
countryCode ← COUNTRY_CODE	String	Country Post Office Code
rwyEndId ← RWY_END_ID	String	ILS Runway End Identifier
ilsLocId ← ILS_LOC_ID	String	ILS Identification code
systemTypeCode ← SYSTEM_TYPE_CODE	SystemTypeCode	ILS System Type code indicating the type of instrument landing system		9 values LS — ILS - Instrument Landing System SF — SDF - Simplified Directional Facility LC — LOC - Localizer LA — LDA - Localizer-Type Directional Aid LD — ILS/DME - Instrument Landing System/Distance Measuring Equipment SD — SDF/DME - Simplified Directional Facility/Distance Measuring Equipment LE — LOC/DME - Localizer/Distance Measuring Equipment LG — LOC/GS - Localizer/Glide Slope DD — LDA/DME - Localizer-Type Directional Aid/Distance Measuring Equipment
stateName ← STATE_NAME	IlsBaseStateName	Associated State Name		56 values ALABAMA — Alabama ALASKA — Alaska AMERICAN SAMOA — American Samoa ARIZONA — Arizona ARKANSAS — Arkansas CALIFORNIA — California COLORADO — Colorado CONNECTICUT — Connecticut DELAWARE — Delaware DIST. OF COLUMBIA — District of Columbia FLORIDA — Florida GEORGIA — Georgia GUAM — Guam HAWAII — Hawaii IDAHO — Idaho ILLINOIS — Illinois INDIANA — Indiana IOWA — Iowa KANSAS — Kansas KENTUCKY — Kentucky LOUISIANA — Louisiana MAINE — Maine MARYLAND — Maryland MASSACHUSETTS — Massachusetts MICHIGAN — Michigan MINNESOTA — Minnesota MISSISSIPPI — Mississippi MISSOURI — Missouri MONTANA — Montana N MARIANA ISLANDS — Northern Mariana Islands NEBRASKA — Nebraska NEVADA — Nevada NEW HAMPSHIRE — New Hampshire NEW JERSEY — New Jersey NEW MEXICO — New Mexico NEW YORK — New York NORTH CAROLINA — North Carolina NORTH DAKOTA — North Dakota OHIO — Ohio OKLAHOMA — Oklahoma OREGON — Oregon PENNSYLVANIA — Pennsylvania PUERTO RICO — Puerto Rico RHODE ISLAND — Rhode Island SOUTH CAROLINA — South Carolina SOUTH DAKOTA — South Dakota TENNESSEE — Tennessee TEXAS — Texas UTAH — Utah VERMONT — Vermont VIRGIN ISLANDS — Virgin Islands VIRGINIA — Virginia WASHINGTON — Washington WEST VIRGINIA — West Virginia WISCONSIN — Wisconsin WYOMING — Wyoming
regionCode ← REGION_CODE	RegionCode	FAA Region responsible for the NAVAID		9 values AAL — Alaska ACE — Central AEA — Eastern AGL — Great Lakes ANE — New England ANM — Northwest Mountain ASO — Southern ASW — Southwest AWP — Western-Pacific
rwyLen ← RWY_LEN	Int	ILS Runway Length in whole feet	feet
rwyWidth ← RWY_WIDTH	Int	ILS Runway Width in whole feet	feet
category ← CATEGORY	Category	Category of the ILS system		I — Category I II — Category II III — Category III IIIB — Category IIIB
owner ← OWNER	String	Concatenation of the ILS Owner Code and ILS Owner Name (e.g. F-FEDERAL AVIATION ADMINISTRATION). Prefix letter indicates ownership type: A=Air Force, C=Coast Guard, F=Federal/FAA, N=Navy, O=Other public, P=Private, R=Army
operator ← OPERATOR	String	Concatenation of the ILS Operator Code and ILS Operator Name (e.g. F-FEDERAL AVIATION ADMINISTRATION). Prefix letter indicates operator type: A=Air Force, C=Coast Guard, F=Federal/FAA, N=Navy, O=Other public, P=Private, R=Army
apchBear ← APCH_BEAR	Float	ILS Approach Bearing in degrees magnetic	degrees magnetic
magVar ← MAG_VAR	Int	Magnetic Variation in degrees	degrees
magVarHemis ← MAG_VAR_HEMIS	LongHemis	Magnetic Variation Direction hemisphere indicator		E — East W — West
componentStatus ← COMPONENT_STATUS	ComponentStatus	Operational Status of the Localizer		OPERATIONAL IFR — Operational for IFR use OPERATIONAL RESTRICTED — Operational with restrictions SHUTDOWN — Shut down and not operational
componentStatusDate ← COMPONENT_STATUS_DATE	String	Effective Date of Localizer Operational Status
latDeg ← LAT_DEG	Int	Localizer Antenna Latitude Degrees	degrees
latMin ← LAT_MIN	Int	Localizer Antenna Latitude Minutes	minutes
latSec ← LAT_SEC	Float	Localizer Antenna Latitude Seconds	seconds
latHemis ← LAT_HEMIS	LatHemis	Localizer Antenna Latitude Hemisphere		N — North S — South
latDecimal ← LAT_DECIMAL	Float	Localizer Antenna Latitude in decimal format	degrees
longDeg ← LONG_DEG	Int	Localizer Antenna Longitude Degrees	degrees
longMin ← LONG_MIN	Int	Localizer Antenna Longitude Minutes	minutes
longSec ← LONG_SEC	Float	Localizer Antenna Longitude Seconds	seconds
longHemis ← LONG_HEMIS	LongHemis	Localizer Antenna Longitude Hemisphere		E — East W — West
longDecimal ← LONG_DECIMAL	Float	Localizer Antenna Longitude in decimal format	degrees
latLongSourceCode ← LAT_LONG_SOURCE_CODE	LatLongSourceCode	Code indicating source of Latitude/Longitude information		16 values A — Air Force C — Coast Guard D — Canadian AIRAC F — FAA FS — Tech Ops (AFS-530) G — NOS (Historical) K — NGS M — DOD (NGA) N — US Navy O — Owner P — NOS Photo Survey (Historical) Q — Quad Plot (Historical) R — Army S — SIAP T — 3rd Party Survey Z — Surveyed
siteElevation ← SITE_ELEVATION	Float	Site Elevation of Localizer Antenna in tenths of a foot MSL	tenths of feet MSL
locFreq ← LOC_FREQ	Float	Localizer Frequency	MHz
bkCourseStatusCode ← BK_COURSE_STATUS_CODE	BkCourseStatusCode	Localizer Back Course Status code		N — No Restrictions R — Restricted U — Unusable Y — Usable

Relationships

ilsGs → [IlsGs]on SITE_NO, RWY_END_ID
ilsDme → [IlsDme]on SITE_NO, RWY_END_ID
ilsMkr → [IlsMkr]on SITE_NO, RWY_END_ID
ilsRmk → [IlsRmk]on SITE_NO, RWY_END_ID