HpfBase

Base holding pattern data including fix/navaid association, direction, course, and leg length

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

Ordered by HP_NAME, HP_NO. The combination of HP_NAME and HP_NO forms the unique record key.

Example query

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

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

Fields (15)

Field	Type	Description	Units	Enum
effDate ← EFF_DATE	String	The 28 Day NASR Subscription Effective Date in format YYYY/MM/DD
hpName ← HP_NAME	String	Holding Pattern Identifier formatted as NAVAID_NAME FACILITY_TYPESTATE_CODE or FIX_NAME FIX_TYPESTATE_CODE*ICAO_REGION_CODE
hpNo ← HP_NO	HpNo	Pattern Number to Uniquely Identify Holding Pattern		10 values 1 — Pattern 1 2 — Pattern 2 3 — Pattern 3 4 — Pattern 4 5 — Pattern 5 6 — Pattern 6 7 — Pattern 7 8 — Pattern 8 9 — Pattern 9 10 — Pattern 10
stateCode ← STATE_CODE	FixBaseStateCode	Associated State Post Office Code, standard two letter abbreviation for US States and Territories		61 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 OA — Pacific Ocean Area OG — Gulf of Mexico Area OH — Ohio OK — Oklahoma OP — Pacific Ocean Area OR — Oregon PA — Pennsylvania PR — Puerto Rico QM — Atlantic Ocean Area QW — Atlantic Ocean Area West 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
countryCode ← COUNTRY_CODE	HpfBaseCountryCode	Country Post Office Code		8 values AS — American Samoa BS — Bahamas CA — Canada FM — Federated States of Micronesia MH — Marshall Islands MP — Northern Mariana Islands PW — Palau US — United States
fixId ← FIX_ID	String	Fix with which the Holding Pattern is Associated
icaoRegionCode ← ICAO_REGION_CODE	HpfBaseIcaoRegionCode	ICAO Region Code of the Fix with which the Holding is Associated		17 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 MY — Bahamas NZ — New Zealand P — Pacific PA — Alaska PG — Guam/Mariana Islands PH — Hawaii TI — US Virgin Islands TJ — Puerto Rico
navId ← NAV_ID	String	Identifier of the NAVAID with which the Holding Pattern is Associated
navType ← NAV_TYPE	HpfBaseNavType	Facility Type of the NAVAID with which the Holding Pattern is Associated		15 values DD — Unnamed DME — Distance Measuring Equipment LA — ILS/DME or MLS/DME LC — Localizer only, no glide slope LD — ILS with DME LE — ILS/DME LG — Localizer glide slope LO — Localizer LS — ILS (Instrument Landing System) NDB — Non-Directional Beacon NDB/DME — Non-Directional Beacon with Distance Measuring Equipment TACAN — Tactical Air Navigation VOR — VHF Omnidirectional Range VOR/DME — VHF Omnidirectional Range with Distance Measuring Equipment VORTAC — VOR and TACAN collocated
holdDirection ← HOLD_DIRECTION	HoldDirection	Compass direction of holding pattern relative to the NAVAID or Fix		8 values E — East N — North NE — Northeast NW — Northwest S — South SE — Southeast SW — Southwest W — West
holdDegOrCrs ← HOLD_DEG_OR_CRS	String	Magnetic Bearing, Radial (Degrees) or Course Direction of Holding	degrees
azimuth ← AZIMUTH	Azimuth	Indicates whether the azimuth value shown is a Radial, Course, Bearing, or RNAV Track		BRG — Bearing CRS — Course RAD — Radial RNAV — RNAV Track
courseInboundDeg ← COURSE_INBOUND_DEG	Int	Inbound Course in degrees magnetic	degrees
turnDirection ← TURN_DIRECTION	TurnDirection	Turning Direction for the holding pattern		L — Left turns R — Right turns
legLengthDist ← LEG_LENGTH_DIST	LegLengthDist	Leg Length Outbound DME distance in nautical miles	nautical miles	20 values 1 — 1 nautical mile 2 — 2 nautical miles 3 — 3 nautical miles 4 — 4 nautical miles 5 — 5 nautical miles 6 — 6 nautical miles 7 — 7 nautical miles 8 — 8 nautical miles 9 — 9 nautical miles 10 — 10 nautical miles 11 — 11 nautical miles 12 — 12 nautical miles 13 — 13 nautical miles 14 — 14 nautical miles 15 — 15 nautical miles 16 — 16 nautical miles 17 — 17 nautical miles 18 — 18 nautical miles 20 — 20 nautical miles 25 — 25 nautical miles