Instrument Approach Procedure (IAP) (GA049)

DGIF baseline 2026-1, the latest. Earlier baselines: timemap.

Name

InstrumentApproachProc

Kind

Type

Definition

A series of predetermined manoeuvres by reference to flight instruments with specified protection from obstacles from the initial approach fix, or where applicable, from the beginning of a defined arrival route to a point from which a landing can be completed and thereafter, if a landing is not completed, to a position at which holding or en-route obstacle clearance criteria apply.

Description

Instrument approach procedures are classified as follows: 1. Non-precision approach (NPA) procedure: An instrument approach procedure which utilizes lateral guidance but does not utilize vertical guidance; 2. Approach procedure with vertical guidance (APV): An instrument procedure which utilizes lateral and vertical guidance but does not meet the requirements established for precision approach and landing operations; 3. Precision approach (PA) procedure: An instrument approach procedure using precision lateral and vertical guidance with minima as determined by the category of operation. Note that lateral and vertical guidance refers to the guidance provided either by: a) a ground-based navigation aid; or b) computer-generated navigation data.

Synonyms

IAP

Accepted

2013-10-18

Subtype of

GA027 Terminal Instrument Procedure

Attributes

AAD Alternate Aircraft Destination Use — multiplicity 0..1; datatype BooleanMeta
APF Approach Prefix — multiplicity 0..1; datatype InstrumentApproachProc_approachPrefixMeta; values: APF_1 HI, APF_2 COPTER, APF_3 CONVERGING
IAT Approach Type — multiplicity 0..1; datatype InstrumentApproachProc_approachTypeMeta; values: IAT_1 Airport Surveillance Radar (ASR), IAT_10 Localizer, IAT_11 Localizer Back Course, IAT_12 Localizer with Distance Measuring Equipment (DME), IAT_13 Localizer with Distance Measuring Equipment (DME) Back Course, IAT_14 Microwave Landing System (MLS), IAT_15 Microwave Landing System (MLS) with Distance Measuring Equipment (DME), IAT_16 Non-Directional Beacon (NDB), IAT_17 Non-Directional Beacon (NDB) with Distance Measuring Equipment (DME), IAT_18 Simplified Directional Facility (SDF), IAT_19 Transponder Landing System (TLS), IAT_2 Airborne Radar Approach (ARA), IAT_20 VHF Omnidirectional Radio (VOR), IAT_21 VHF Omnidirectional Radio (VOR) with Distance Measuring Equipment (DME), IAT_22 UHF Tactical Air Navigation (TACAN) Beacon, IAT_23 VHF Omnidirectional Radio (VOR) with UHF Tactical Air Navigation (TACAN) Beacon, IAT_24 Distance Measuring Equipment (DME), IAT_25 Distance Measuring Equipment (DME) with Distance Measuring Equipment (DME), IAT_26 Required Navigation Performance (RNP), IAT_27 Global Positioning System (GPS), IAT_28 Global Navigation Satellite System (GNSS), IAT_29 Area Navigation (RNAV), IAT_3 Air Route Surveillance Radar (ARSR), IAT_30 Instrument Guidance System (IGS), IAT_31 Area Navigation (RNAV) to Instrument Landing System (ILS), IAT_32 Special Aircraft and Aircrew Approval Required (SAAAR), IAT_33 Visual, IAT_34 Satellite Based Augmentation System (SBAS), IAT_4 Precision Approach Radar (PAR), IAT_5 Instrument Landing System (ILS), IAT_6 Instrument Landing System (ILS) with Distance Measuring Equipment (DME), IAT_7 Instrument Landing System (ILS) using a Precision Runway Monitor (PRM), IAT_8 Localizer-type Directional Aid (LDA), IAT_9 Localizer-type Directional Aid (LDA) with Distance Measuring Equipment (DME)
CPI Circling Procedure Identification — multiplicity 0..1; datatype CharacterStringMeta
CFF Copter Final Approach Course — multiplicity 0..1; datatype MeasureMeta
RVD Course Reversal Description — multiplicity 0..1; datatype CharacterStringMeta
DUP Duplicate Procedure Identification — multiplicity 0..1; datatype CharacterStringMeta
CHG GNSS Channel — multiplicity 0..1; datatype IntegerMeta
IAE Instrument Procedure Additional Equipment — multiplicity 0..*; datatype InstrumentApproachProc_instProcAddEquipmentMeta; values: IAE_1 Automatic Direction Finder (ADF), IAE_10 Radar, IAE_11 Radar or Distance Measuring Equipment (DME), IAE_12 Radar or RNAV, IAE_13 Special, IAE_14 VHF Omnidirectional Radio (VOR) Beacon and ILS Localizer (VORLOC), IAE_2 Automatic Direction Finder (ADF) for Missed Approach, IAE_3 Automatic Direction Finder (ADF) for ILS Approach, IAE_4 Distance Measuring Equipment (DME), IAE_5 Dual Automatic Direction Finder (ADF), IAE_6 Dual Automatic Direction Finder (ADF) and Distance Measuring Equipment (DME), IAE_7 Dual Very High Frequency (VHF) Radios, IAE_8 Dual VHF Omnidirectional Radio (VOR) Beacon with Distance Measuring Equipment (VORDME), IAE_9 Global Position System (GPS) or Reduced Navigation Performance (RNP3) Equipment
TPD Terminal Instrument Procedure Designator — multiplicity 0..1; datatype CharacterStringMeta

Inverse associations

instAppProcedureSegment (inverse of InstrumentApproachProcInstrumentApproachProcSegment) → GA050 Instrument Approach Procedure (IAP) Segment (1..*)
missedApproachInfo (inverse of InstrumentApproachProcMissedApproachInfo) → GA291 Missed Approach Information (1..*)
termArrivalAltitude (inverse of InstrumentApproachProcTerminalArrivalAltitude) → GA023 Terminal Arrival Altitude (TAA) (1..*)

RWOI terms naming it

RWO_01740 Instrument Approach Procedure (IAP)