CifpMsa

Minimum Sector Altitude (MSA) records defining obstacle clearance altitudes within defined sectors around a reference navaid or fix near an airport

Source: CIFPTable: CIFP_MSAVersion: 239462ba9c35 (effective 2026-04-16)

Each record can define up to 7 sectors (SECTOR_BEARING/ALTITUDE/RADIUS 1-7). SECTOR_BEARING values are encoded as 6-digit strings where the first 3 digits represent the start bearing and the last 3 digits represent the end bearing of the sector. SECTOR_ALTITUDE values are stored in hundreds of feet (e.g., '063' = 6300 feet MSL). A single omnidirectional MSA uses 180180 as the bearing (360-degree sector). Multiple sectors define a divided MSA around the center fix.

Example query

# Introspect the CifpMsa type in GraphiQL at https://api.nav.sortie.co/graphql
# Example shape (pair with a compatible root query field):
{
  # ...rootQuery... {
    recordType
    customerAreaCode
    sectionCode
    airportIdentifier
  # }
}

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

Fields (34)

Field	Type	Description	Units	Enum
recordType ← RECORD_TYPE	RecordType	ARINC 424 record type identifier; 'S' indicates a standard record		S — Standard record
customerAreaCode ← CUSTOMER_AREA_CODE	CustomerAreaCode	Geographic area code identifying the region of the world for which the record applies		CAN — Canada LAM — Latin America/Caribbean PAC — Pacific SPA — South Pacific/Australia USA — United States
sectionCode ← SECTION_CODE	CifpMsaSectionCode	ARINC 424 section code identifying the record type; 'PS' indicates Airport MSA (Airport/Heliport section, MSA subsection)		PS — Airport/Heliport MSA
airportIdentifier ← AIRPORT_IDENTIFIER	String	ICAO identifier of the airport or heliport with which this MSA record is associated
icaoCode ← ICAO_CODE	CifpMsaIcaoCode	ICAO region code for the airport identified in AIRPORT_IDENTIFIER		18 values K1 — Contiguous US (eastern) K2 — Contiguous US (central) K3 — Contiguous US (western) K4 — Contiguous US (northwest) K5 — Contiguous US (southwest) K6 — Contiguous US (north-central) K7 — Contiguous US (south-central) NS — North Atlantic/North Sea PA — Alaska PF — Pacific (other) PG — Guam/Micronesia PH — Hawaii PK — Marshall Islands PM — Midway Island PO — Pacific Ocean PT — Trust Territory of Pacific TI — US Virgin Islands TJ — Puerto Rico
msaCenter ← MSA_CENTER	String	Identifier of the navaid, fix, or runway used as the center reference point for the MSA sectors; may be a VOR, NDB, waypoint, or runway identifier
icaoCode2 ← ICAO_CODE_2	CifpMsaIcaoCode2	ICAO region code for the MSA center fix identified in MSA_CENTER		19 values K1 — Contiguous US (eastern) K2 — Contiguous US (central) K3 — Contiguous US (western) K4 — Contiguous US (northwest) K5 — Contiguous US (southwest) K6 — Contiguous US (north-central) K7 — Contiguous US (south-central) NS — North Atlantic/North Sea NZ — New Zealand PA — Alaska PF — Pacific (other) PG — Guam/Micronesia PH — Hawaii PK — Marshall Islands PM — Midway Island PO — Pacific Ocean PT — Trust Territory of Pacific TI — US Virgin Islands TJ — Puerto Rico
sectionCode2 ← SECTION_CODE_2	SectionCode3	ARINC 424 section/subsection code identifying the type of the MSA center fix referenced in MSA_CENTER		D — VHF Navaid (VOR, VORDME, etc.) DB — NDB Navaid PA — Airport/Heliport reference point PC — Terminal Waypoint/Fix PG — Runway PN — Terminal NDB
multipleCode ← MULTIPLE_CODE	MultipleCodeOrTaaSectorIdentifier	Differentiates multiple MSA records for the same airport when more than one MSA is defined (e.g., for different center fixes or overlapping definitions)		A — First additional MSA definition B — Second additional MSA definition
continuationRecordNo ← CONTINUATION_RECORD_NO	String	Continuation record number; '0' indicates a primary record, higher values indicate continuation records with additional data
sectorBearing ← SECTOR_BEARING	String	Sector 1 bearing limits encoded as a 6-digit string: first 3 digits = sector start bearing (degrees), last 3 digits = sector end bearing (degrees). A value of 180180 indicates an omnidirectional (360-degree) sector.	degrees
sectorAltitude ← SECTOR_ALTITUDE	String	Minimum sector altitude for sector 1, stored in hundreds of feet MSL (e.g., '063' = 6300 feet MSL)	hundreds of feet MSL
sectorRadius ← SECTOR_RADIUS	String	Radius of sector 1 defining the area within which the minimum sector altitude applies, measured from the MSA center fix	nautical miles
sectorBearing2 ← SECTOR_BEARING_2	String	Sector 2 bearing limits encoded as a 6-digit string: first 3 digits = sector start bearing (degrees), last 3 digits = sector end bearing (degrees); null if fewer than 2 sectors are defined	degrees
sectorAltitude2 ← SECTOR_ALTITUDE_2	String	Minimum sector altitude for sector 2, stored in hundreds of feet MSL; null if fewer than 2 sectors are defined	hundreds of feet MSL
sectorRadius2 ← SECTOR_RADIUS_2	String	Radius of sector 2; null if fewer than 2 sectors are defined	nautical miles
sectorBearing3 ← SECTOR_BEARING_3	String	Sector 3 bearing limits encoded as a 6-digit string: first 3 digits = sector start bearing (degrees), last 3 digits = sector end bearing (degrees); null if fewer than 3 sectors are defined	degrees
sectorAltitude3 ← SECTOR_ALTITUDE_3	String	Minimum sector altitude for sector 3, stored in hundreds of feet MSL; null if fewer than 3 sectors are defined	hundreds of feet MSL
sectorRadius3 ← SECTOR_RADIUS_3	String	Radius of sector 3; null if fewer than 3 sectors are defined	nautical miles
sectorBearing4 ← SECTOR_BEARING_4	String	Sector 4 bearing limits encoded as a 6-digit string: first 3 digits = sector start bearing (degrees), last 3 digits = sector end bearing (degrees); null if fewer than 4 sectors are defined	degrees
sectorAltitude4 ← SECTOR_ALTITUDE_4	String	Minimum sector altitude for sector 4, stored in hundreds of feet MSL; null if fewer than 4 sectors are defined	hundreds of feet MSL
sectorRadius4 ← SECTOR_RADIUS_4	String	Radius of sector 4; null if fewer than 4 sectors are defined	nautical miles
sectorBearing5 ← SECTOR_BEARING_5	String	Sector 5 bearing limits encoded as a 6-digit string: first 3 digits = sector start bearing (degrees), last 3 digits = sector end bearing (degrees); null if fewer than 5 sectors are defined	degrees
sectorAltitude5 ← SECTOR_ALTITUDE_5	String	Minimum sector altitude for sector 5, stored in hundreds of feet MSL; null if fewer than 5 sectors are defined	hundreds of feet MSL
sectorRadius5 ← SECTOR_RADIUS_5	String	Radius of sector 5; null if fewer than 5 sectors are defined	nautical miles
sectorBearing6 ← SECTOR_BEARING_6	String	Sector 6 bearing limits encoded as a 6-digit string: first 3 digits = sector start bearing (degrees), last 3 digits = sector end bearing (degrees); null if fewer than 6 sectors are defined	degrees
sectorAltitude6 ← SECTOR_ALTITUDE_6	String	Minimum sector altitude for sector 6, stored in hundreds of feet MSL; null if fewer than 6 sectors are defined	hundreds of feet MSL
sectorRadius6 ← SECTOR_RADIUS_6	String	Radius of sector 6; null if fewer than 6 sectors are defined	nautical miles
sectorBearing7 ← SECTOR_BEARING_7	String	Sector 7 bearing limits encoded as a 6-digit string: first 3 digits = sector start bearing (degrees), last 3 digits = sector end bearing (degrees); null if fewer than 7 sectors are defined	degrees
sectorAltitude7 ← SECTOR_ALTITUDE_7	String	Minimum sector altitude for sector 7, stored in hundreds of feet MSL; null if fewer than 7 sectors are defined	hundreds of feet MSL
sectorRadius7 ← SECTOR_RADIUS_7	String	Radius of sector 7; null if fewer than 7 sectors are defined	nautical miles
magneticTrueBearing ← MAGNETIC_TRUE_BEARING	MagneticTrueIndicator	Indicates whether the sector bearings in this record are referenced to magnetic north or true north		M — Magnetic bearing reference T — True bearing reference
fileRecordNo ← FILE_RECORD_NO	String	Sequential file record number assigned to this record within the ARINC 424 data file for traceability
cycleDate ← CYCLE_DATE	String	AIRAC cycle date indicating when this record was last updated, encoded as a 4-digit string where the first 2 digits represent the year and the last 2 digits represent the AIRAC cycle number (e.g., '1310' = year 2013, cycle 10)