ICAO ANNEX 14 AGL REQUIREMENTS
A deep dive into ICAO requirements for Airfield Ground Lighting, visual aids and aerodrome operations — how Annex 14 SARPs are translated through national and airport requirements into approved design, installed equipment, verified performance and defensible compliance evidence.
Annex 14 Is a Framework, Not a Parts List
ICAO Annex 14, Volume I, Aerodromes — Aerodrome Design and Operations, establishes Standards and Recommended Practices covering aerodrome physical characteristics, obstacle limitation, visual aids and much of the operational and safety framework that governs an airport.
For Airfield Ground Lighting, Annex 14 should not be treated simply as a list of lamps. It provides the regulatory framework within which an aerodrome's runway lighting, taxiway lighting, approach lighting, PAPI, stop bars, runway guard lights, signs, markings, obstacle lighting, visual guidance systems, electrical systems, emergency systems and operational procedures are designed and operated.
What Is ICAO Annex 14?
ICAO Annex 14 is the ICAO Annex dedicated to aerodromes. It establishes Standards and Recommended Practices for aerodrome design and operations.
Volume I addresses aerodromes, while Volume II addresses heliports. For AGL engineering, Volume I is the principal Annex 14 reference.
Why Annex 14 Matters to AGL
AGL is part of the aerodrome's visual guidance infrastructure. Annex 14 provisions interact with a wide range of aerodrome factors — therefore an AGL engineer should never select a lighting system independently of the aerodrome design.
Current Annex 14 Baseline & Amendment 18
The ICAO Store currently lists Annex 14, Volume I, 9th Edition, July 2022, and indicates that the current publication includes Amendment 18. ICAO also lists Corrigendum 2 dated 18 March 2026 and Corrigendum 3 dated 8 June 2026. For compliance work, the engineer should therefore verify the complete current edition, amendments and applicable corrigenda rather than relying on any single number.
Annex 14, Volume I — July 2022
Adopted 28 March 2025; effective 4 August 2025
Aerodrome design, visual aids & apron management provisions applicable
Dated 18 March 2026
Dated 8 June 2026
ICAO's own summary of the visual-aids part of Amendment 18 lists the subjects below. Confirm the exact wording, clause numbers and any national differences against the consolidated current text before using them in a design or compliance statement.
Annex 14 Is Not an Equipment Datasheet
Annex 14 does not replace manufacturer datasheets, equipment specifications, installation manuals, approved drawings, electrical calculations, photometric test procedures or airport technical specifications. Instead, each layer defines a different part of the picture:
| Layer | Defines |
|---|---|
| Annex 14 | Applicable aerodrome requirements |
| Project Specification | Project-specific requirements |
| Manufacturer | Equipment characteristics |
| Approved Design | The installed configuration |
Standards & Recommended Practices
ICAO uses the term Standards and Recommended Practices, commonly abbreviated as SARPs.
A Standard represents a provision considered necessary for the safety or regularity of international air navigation, to which Contracting States are expected to conform. A Recommended Practice provides guidance that ICAO considers desirable. The engineer must understand which type of provision is being applied.
Do not treat every Annex 14 paragraph as if it has exactly the same regulatory status. For compliance documentation, distinguish:
How ICAO classifies aerodrome lighting.
AGL Visual Encyclopedia: ICAO Lighting Classification ICAO AGL Terminology Applicable-Standard Identification
State Responsibility & the Compliance Chain
ICAO establishes international SARPs, but implementation occurs through States and their national aviation systems. Therefore: ICAO Requirement ≠ Automatically the Entire National Requirement. For an Indian airport project, the engineer must also consider applicable national and airport-level requirements.
Each layer normally adds to or makes more specific what sits above it — but a State may notify differences from ICAO Standards, so always check the applicable national requirement
Aerodrome Reference Code & Visual Aids for Navigation
AGL design is affected by the characteristics and classification of the aerodrome. Before finalizing the lighting arrangement, the engineer should establish the applicable:
Visual aids form one of the most important interfaces between Annex 14 and AGL. ICAO's Aerodrome Design Manual, Part 4, specifically covers visual aids including surface markings, approach lighting, runway/taxiway lighting, SMGCS and related systems.
Markings
Lights
Signs
PAPI
Approach Lighting
Taxiway Lighting
Visual Guidance Systems
Obstacle Lighting
Runway Lighting
Runway Lighting
Annex 14 establishes requirements for runway visual aids according to the applicable runway and operational characteristics. The applicable configuration depends on the runway type and operating requirements. Exact values should always be taken from the current applicable Annex 14 provision and approved design.
Runway Edge Lighting
Visual definition of runway edges under the conditions for which it is required.
- Location & spacing
- Colour & intensity
- Circuit & control
- Photometric performance
Runway Centreline Lighting
Supports precise runway alignment where centreline lighting is required.
- Fixture spacing & location
- Colour characteristics
- Electrical circuit
- Photometry
Threshold Lighting
Visual identification of the runway threshold, integrated with markings and edge/centreline lighting.
Runway End Lighting
Visual identification of the runway end, coordinated with geometry, threshold and edge system.
Touchdown Zone Lighting
Associated with precision approach runway operations where applicable.
- Fixture arrangement & position
- Optical characteristics
- Circuit, control & monitoring
Runway edge lights and where they sit.
AGL Visual Encyclopedia: Runway Edge Lights Runway Centreline Lights Threshold Lights
Approach Lighting Systems & PAPI
Approach lighting provides visual guidance to aircraft approaching the runway. Its configuration depends on approach category, runway type, instrument approach and aerodrome configuration. Approach lighting must be considered together with the runway visual system — a discontinuity or incorrect configuration can reduce the effectiveness of the visual guidance chain.
Precision Approach Path Indicator (PAPI) systems provide visual information concerning aircraft approach path. PAPI should be treated as a complete optical and geometric system — correct mechanical installation alone does not guarantee correct approach guidance.
The approach lighting system and its parts.
AGL Visual Encyclopedia: Approach Lighting System Overview Lighting requirements by approach category (CAT I, II, III) CAT II and III approach lighting
ICAO PAPI Requirements, Angle, Installation & Photometry
What does ICAO Annex 14 say about PAPI? The ICAO PAPI requirements define the system, where it is sited, how its units are aimed and how its light must perform. Treat papi ICAO and icao papi values as design-standard values, not field estimates.
| Topic | ICAO PAPI provision (summary) |
|---|---|
| System | A wing bar of light units giving red and white indications; smaller aerodromes may use the 2-unit form |
| ICAO PAPI angle | Unit aiming angles are set in small steps around the approach slope angle; the standard states the settings and the permitted tolerances |
| ICAO PAPI installation | Position relative to the runway edge and threshold, mounting height and frangibility, set against the obstacle protection requirements |
| ICAO PAPI photometry | Intensity, colour and the red-white transition are checked against the standard's photometric characteristics |
ICAO PAPI Angle
The unit aiming angles are set in small steps around the approach slope angle. The standard states the settings and the permitted tolerances, so take them from the current Annex 14 and the approved design.
ICAO PAPI Installation
Installation covers the position relative to the runway edge and threshold, the mounting height and frangibility, set against the obstacle protection requirements.
ICAO PAPI Photometry
Intensity, colour and the red-white transition are checked against the standard's photometric characteristics.
Go Deeper on PAPI
The PAPI Engineering Guide covers siting, aiming, electrical supply, photometry and troubleshooting in detail.
PAPI Engineering GuideThe PAPI system and its elements.
AGL Visual Encyclopedia: PAPI System Overview PAPI Optical Principle PAPI Elevation Angle
Taxiway Lighting, Stop Bars & Runway Guard Lights
Taxiway lighting supports aircraft movement on taxiways. Depending on the applicable configuration, this may include taxiway centreline lights, taxiway edge lights, rapid exit taxiway indicator lights, intermediate holding position lights, stop bars and runway guard lights.
Taxiway Centreline Lighting
Visual guidance along the intended aircraft route — must correspond with geometry, markings, intersections and holding positions.
Taxiway Edge Lighting
Visual identification of taxiway edges — location, spacing, colour, intensity and photometric performance.
Runway Guard Lights
Conspicuous visual warning of the runway environment, integrated with holding position markings, signs, stop bars and ATC procedures.
Stop Bars
Highly visible indication associated with a runway holding position — more than a fixture installation.
Taxiway Intersection Lighting
Coordination of centreline, edge lighting, signs, markings, holding positions and guard lights for unambiguous routing.
Taxiway Guidance Signs
Location, direction and mandatory-instruction information, matched to actual taxiway geometry.
Taxiway Lighting ICAO Requirements
For taxiway lighting, ICAO Annex 14 sets out where each type of light is required, its colour, its spacing and its photometric performance. In general, taxiway centreline lights are green, taxiway edge lights are blue, stop bars are red and intermediate holding position lights are yellow. Always confirm the colour, spacing and intensity against the current edition of Annex 14 and the national regulation, not from memory.
Taxiway Lighting Systems guideStop bars across the taxiway at a runway holding position.
AGL Visual Encyclopedia: Stop Bar Lights Runway Guard Lights Taxiway Centreline Lights
Markings, Signs, Colour & Intensity
AGL cannot be considered independently from pavement markings and signs — the physical and visual information should agree, and colour should be verified against the current requirement, not based on memory.
Colour Requirements
Must be verified across light colour, sign colour, marking colour, operational meaning and the applicable photometric/visual requirement.
Light Intensity
Depends on light type, runway/taxiway application, operational category, visibility, circuit current and intensity setting. A universal intensity value should not be applied to every AGL fixture.
How light colour is defined on the chromaticity diagram.
AGL Visual Encyclopedia: Chromaticity Colour Coordinates AGL Colour Code Summary
ICAO Aerodrome Lighting Requirements by System
ICAO aerodrome lighting requirements sit in Annex 14 Volume I, including the ICAO approach lighting requirements. Each system below has its own provisions for pattern, colour and intensity; always read the current edition and the State's adopted version.
| System | What Annex 14 addresses | Colour (general) |
|---|---|---|
| ICAO approach lighting system | Approach lighting requirements: pattern, length and intensity by runway type and approach category | White, with red side rows on precision categories |
| ICAO runway centerline lights | Runway centerline lights: spacing, unidirectional or bidirectional use and intensity | White (colour changes near the runway end) |
| ICAO touchdown zone lights | Touchdown zone lights on precision approach runways: pattern and intensity | White |
| ICAO taxiway edge lights | Taxiway edge lights: spacing, curves and intersections | Blue |
| ICAO taxiway centerline lights | Taxiway centerline lights: guidance, curves and exits | Green |
| ICAO stop bar lights | Stop bars at holding positions, with interlock to the controlling procedure | Red |
| ICAO runway guard lights | Runway guard lights at runway-holding positions, in the configurations the standard allows | Yellow (alternating) |
ICAO Runway Centerline Lights
Annex 14 addresses runway centerline light spacing, unidirectional or bidirectional use and intensity. The colour is generally white, with a colour change near the runway end. Confirm the details against the current Annex 14 and the approved design.
ICAO Taxiway Edge Lights
Annex 14 addresses taxiway edge light spacing, and how the lights are placed on curves and at intersections. The colour is generally blue. Confirm the details against the current Annex 14 and the approved design.
ICAO Lighting Colour & Light Intensity Requirements
ICAO lighting colour requirements are defined by chromaticity limits, and ICAO light intensity requirements by minimum intensities at specified angles, in the Annex 14 appendices on colours and light characteristics. These are verified by photometry, not by visual judgement.
AGL photometryICAO Annex 14 Taxiway Lighting & Runway Lighting
What does ICAO Annex 14 say about runway lighting and taxiway lighting? It sets which lights are required, their colours, spacing logic and intensity, based on the runway type, approach category and operating visibility. ICAO taxiway lighting requirements add stop bars and guidance lights for low-visibility operations, and approach lighting ICAO provisions cover the approach side.
Runway lighting systems Taxiway lighting systems Approach lighting systemsWhat each approach category needs on the runway.
AGL Visual Encyclopedia: Lighting requirements by approach category (CAT I, II, III) Compliance Matrix
AGL Photometry vs Electrical Testing
Photometry verifies whether the installed lighting equipment produces the required optical performance. Depending on the system, testing may involve intensity, colour, beam alignment, coverage, uniformity and other specified characteristics. The applicable measurement method must correspond to the equipment and requirement.
Electrical testing and photometry are different disciplines. A fixture can pass an electrical test and still fail photometry.
| Verification | Primary Question |
|---|---|
| Voltage / Current | Is the circuit electrically operating? |
| Insulation | Is electrical insulation satisfactory where applicable? |
| Earth Continuity | Is the protective path intact? |
| CCR Test | Is the regulator functioning correctly? |
| Functional Test | Does the system respond correctly? |
| Photometry | Is the light producing the required optical performance? |
Checking a light against its photometric requirement.
AGL Visual Encyclopedia: Photometric Compliance Flow Light-Intensity Measurement Ground-Fault Detection and Insulation Monitoring
CCRs, Series Circuits, Transformers, Cables & Connectors
AGL series circuits commonly use Constant Current Regulators. A typical AGL series circuit runs from the CCR through primary cable, an isolation transformer and secondary cable, to the light fixture — the complete circuit must be considered during design and testing.
Constant Current Regulators
- Output current & step control
- Circuit loading
- Open/short-circuit response
- Monitoring, control & protection
- Earthing
Isolation Transformers
- Rating & primary compatibility
- Secondary output
- Insulation & leakage
- Connector arrangement
- Installation & testing
AGL Cables & Connectors
- Voltage rating & insulation
- Current & jointing
- Connector compatibility
- Earthing & sealing
- Environmental conditions
AGL Control, Monitoring & ALCMS
AGL may be controlled through local control, remote control, control panels, an Airport Lighting Control and Monitoring System (ALCMS), the ATC interface and airport operational systems. The control philosophy should be documented.
ALCMS Functions
- Lighting control
- Circuit status
- Alarm indication
- Remote switching
- Event logging & monitoring
ALCMS Status vs Field Reality
- Does not prove every fixture is illuminated
- Does not prove correct intensity
- Does not prove correct colour
- Does not prove correct beam alignment
- Does not prove photometric performance
From a field fault to an alarm the operator can act on.
AGL Visual Encyclopedia: Alarm Monitoring Remote Monitoring Stop Bar Monitoring
Electrical Power Supply, Emergency Power & Lightning Protection
Annex 14 visual aids depend on reliable electrical infrastructure. Critical aerodrome visual aids may require secondary power arrangements — the exact requirements depend on the aerodrome and applicable Annex 14 provisions.
Primary Power
Distribution, protection, control and monitoring of the main supply.
Secondary / Emergency Power
Generator, UPS, battery systems, dual supply and automatic transfer, designed around the actual operational requirement.
Lightning Protection
Surge protection, earthing, bonding, counterpoise where applicable, equipment and CCR protection.
Standby power and what it must carry.
AGL Visual Encyclopedia: Standby power and UPS CCR Power Input
Failure of Individual vs Multiple Fixtures
A Single Failed Fixture
Should be assessed according to the applicable system and operational significance.
- Number of affected lights
- Location & function
- Redundancy
- Operational impact & corrective action
Multiple Fixture Failures
Can indicate a common-cause problem — do not assume every failed fixture has an independent cause.
- CCR & series circuit
- Cable, isolation transformers, connectors
- Control system
- Lightning / surge / power supply
Minimum serviceable percentages by light type.
AGL Visual Encyclopedia: Minimum Serviceable Lamp Percentages by Light Type ICAO Serviceability Level Concept Serviceability of Critical Lights
Obstruction Lighting, Surface Movement Guidance & Low-Visibility Operations
Annex 14 also addresses obstacle-related visual identification, and AGL contributes to Surface Movement Guidance and Control as well as runway incursion prevention through a layered safety architecture.
Obstruction Lighting
Considered based on obstacle characteristics, location, height, aerodrome environment and applicable obstacle requirements.
Surface Movement Guidance
Combines markings, signs, taxiway lights, stop bars, runway guard lights, ALCMS, surveillance, ATC and procedures.
Low-Visibility Operations
Increases dependence on lighting, signs, markings, stop bars, centreline guidance, control, monitoring and backup power.
Runway Incursion Prevention
Stop bars, runway guard lights, taxiway guidance, holding-position visual aids, signs and markings — designed as a layered safety architecture.
Signs & Markings Integration
The complete visual system: marking + sign + lighting + geometry + procedure, working together.
Human Factors
Visibility, contrast, colour, position, consistency, glare and complexity — the objective is safe human interpretation, not just technical compliance.
AGL Inspection, Testing & Maintenance
AGL testing should distinguish electrical, functional, optical and operational verification. Maintenance is not simply replacing failed lamps — it should preserve the intended aerodrome visual performance.
Physical
- Fixture condition
- Mounting & alignment
- Cable & connector
- Transformer
Electrical
- Circuit condition
- CCR
- Earthing
- Protection
Optical
- Colour
- Intensity
- Beam
- Coverage
Control
- Switching
- Monitoring
- Alarms
Maintenance should be based on: manufacturer instructions, airport maintenance procedures, applicable ICAO requirements, national requirements, equipment condition and operational importance — not on calendar intervals alone.
Measurement equipment used for compliance testing — photometric equipment, illuminance meters, electrical test equipment, current measurement equipment, alignment equipment — should have valid calibration, and calibration records should be included in the test documentation.
From serviceability result to maintenance action.
AGL Visual Encyclopedia: Serviceability-Triggered Maintenance Flow Serviceability Measurement and Reporting
ICAO Doc 9157 Aerodrome Design Manual & ICAO AGL Maintenance
ICAO Doc 9157, the ICAO aerodrome design manual, is guidance material that supports Annex 14. It is not a Standard, so the Annex 14 provisions take precedence.
| Reference | Role |
|---|---|
| ICAO Doc 9157 Part 4 | Visual aids: design guidance for the lights, markings and signs |
| ICAO Doc 9157 Part 5 | Electrical systems: guidance on circuits, power supply, regulators and transformers |
| ICAO airport design manual lighting guidance | Design guidance for aerodrome lighting, read alongside Annex 14 and the State's regulations |
ICAO Airport Design Manual Lighting Guidance
The ICAO airport design manual (Doc 9157) gives design guidance for aerodrome lighting, read alongside Annex 14 and the State's regulations. Part 4 covers visual aids, meaning the lights, markings and signs, and Part 5 covers electrical systems. It is guidance, not a Standard, so the Annex 14 provisions take precedence.
ICAO AGL Maintenance
ICAO AGL maintenance follows Annex 14's requirement to keep visual aids serviceable, with inspection, cleaning, measurement and records planned by the aerodrome operator. Photometric checks show whether the light still performs.
AGL Maintenance HandbookICAO AGL Photometry
ICAO AGL photometry confirms that intensity, colour and beam distribution still meet the standard after installation, repair or lamp and LED replacement.
AGL photometryCompliance Verification & the Documentation Package
A strong compliance statement identifies: Requirement → Design Response → Equipment → Installation → Test Evidence → Compliance Status.
| Requirement | Design Response | Evidence | Status |
|---|---|---|---|
| Applicable runway light | Approved lighting layout | Inspection / test report | Compliant |
| Applicable taxiway lighting | Approved taxiway layout | Photometric report | Compliant |
| Stop bar | Approved control design | Functional test | Compliant |
| Secondary power | Approved power design | Transfer test | Compliant |
Deciding whether an installation complies.
AGL Visual Encyclopedia: Compliance Decision Tree Compliance Matrix
ICAO Compliance vs FAA vs Indian Standards
ICAO vs FAA
ICAO and FAA documents are not interchangeable. For an ICAO-based airport, ICAO + National Requirements + Airport Specification should form the primary compliance basis. FAA guidance may be a useful equipment or engineering reference where specifically applicable, but should not automatically replace the governing ICAO/national framework.
ICAO vs IS Standards
Indian projects may also specify Indian Standards for electrical equipment, AGL components, transformers, cables and connectors.
FAA Runway Lighting Standards
FAA runway lighting standards are published in FAA advisory circulars, which cover the equipment specifications and the design and installation of the lighting. They are a separate framework from Annex 14, so they are used as an equipment or engineering reference only where the project specification names them.
FAA Taxiway Lighting Standards
The same applies to FAA taxiway lighting standards. They cover taxiway edge and centreline lighting, but they do not automatically replace the ICAO and national requirements for an ICAO-based airport. See the ICAO vs FAA standards comparison and the Standards Companion.
ICAO, EASA, FAA and DGCA compared.
AGL Visual Encyclopedia: Regulator Comparison Matrix (ICAO, EASA, FAA, DGCA) DGCA CAR versus ICAO Annex 14 Differences EASA CS-ADR-DSN versus ICAO Annex 14
Type Testing vs Site Testing
Type testing demonstrates characteristics of the equipment under defined test conditions — isolating transformers, light fixtures, CCRs, signs and connectors. It should not be confused with site acceptance testing.
| Test | Purpose |
|---|---|
| Type Test | Product / design qualification |
| Factory Test | Manufacturing verification |
| Site Installation Test | Installation verification |
| Site Functional Test | Operational function |
| Photometric Test | Optical performance |
| Integrated Test | Complete system behaviour |
| Acceptance Test | Contract / project acceptance |
Two kinds of test answer two different questions.
AGL Visual Encyclopedia: Photometric Compliance Flow Compliance Decision Tree
Compliance Layers & the 6-Level AGL Compliance Model
| Layer | Question |
|---|---|
| ICAO | What requirement applies? |
| National | What State requirement applies? |
| Airport | What additional specification applies? |
| Design | How is the requirement implemented? |
| Equipment | Does the selected equipment meet the design? |
| Installation | Is it installed correctly? |
| Testing | Has performance been demonstrated? |
| Operation | Does it work as intended? |
| Documentation | Is objective evidence available? |
Level 1 — Regulatory Compliance
Level 2 — Design Compliance
Level 3 — Equipment Compliance
Level 4 — Installation Compliance
Level 5 — Performance Compliance
Level 6 — Operational Compliance
Each level rests on the one below it — a gap at any level weakens every level built on top of it
The ICAO AGL Troubleshooting Model
When an AGL system fails: Requirement → Design → Physical Installation → Electrical Circuit → Control → Optical Performance → Operational Effect. This prevents the engineer from treating every fault as a simple equipment failure. Click an example to see the investigation areas.
Fixture ON but Photometrically FAIL
Investigation
- Verify supply & fixture type
- Check lens & optics
- Check alignment
- Perform photometry
- Compare with applicable acceptance criteria
Stop Bar Not Operating
Investigation
- Fixture & isolation transformer
- Secondary connection & series circuit
- CCR & control output
- ALCMS, interlocking & monitoring
- Operational command
PAPI ON but Incorrect Guidance
Investigation
- Physical installation & elevation
- Alignment & wing-bar geometry
- Obstacle environment
- Photometric condition & survey
- Operational verification
Multiple Taxiway Lights Fail
Investigation
- CCR → series circuit → cable
- Isolation transformers → connectors
- Lightning / surge
- Fixtures
- Establish common cause before mass replacement
Common ICAO AGL Engineering Mistakes
Using an old Annex 14 edition without checking amendments.
Treating ICAO as the only project requirement.
Using FAA criteria automatically on an ICAO project.
Using a manufacturer certificate as proof of complete site compliance.
Testing electrical operation but not optical performance.
Ignoring approved airport drawings.
Ignoring secondary power.
Ignoring control and monitoring.
Using remembered intensity or spacing values without checking the current requirement.
Declaring compliance without objective evidence.
Safety Significance & the NOTAM Interface
AGL failures should be evaluated according to their operational significance — a single runway light failure, multiple centreline-light failures, a stop-bar failure, PAPI failure, approach-lighting failure or secondary-power failure each carry a different operational response depending on the system, aerodrome configuration and applicable procedures.
An engineering fault may have operational consequences. The engineer should identify the technical condition, determine affected equipment, record the actual field condition, notify the responsible airport operational function, and support the authorized aeronautical-information process.
Engineering personnel should not independently issue an operational notice unless authorized to do so.
Standards & References
Primary
- ICAO Annex 14, Volume I
- Current applicable amendments
- Current applicable corrigenda
ICAO Supporting Material
- Aerodrome Design Manual, Doc 9157
- Part 4, Visual Aids
- PANS-Aerodromes, where applicable
- Other applicable ICAO guidance
National / Project
- DGCA requirements
- AAI requirements, where applicable
- Airport-specific specifications
- Approved aerodrome manual & drawings
- Approved ITP
- Manufacturer requirements
- Applicable IS/IEC standards
The Final Engineering Principle
ICAO Annex 14 compliance is not achieved by writing "ICAO Compliant." It is achieved by demonstrating the complete chain: Applicable Requirement → Correct Design → Suitable Equipment → Correct Installation → Verified Electrical Performance → Verified Optical Performance → Verified Functional Performance → Operational Verification → Objective Documentation.
For an AGL engineer, the most important principle is: never ask only, "Is this AGL equipment ICAO compliant?" Ask, "Which ICAO requirement applies, how has it been implemented in the approved design, and what objective evidence proves that the installed system satisfies it?"
Understand
Start with the requirement, not the product.
Identify Requirement
Identify the aerodrome and determine applicable requirements.
Check Current Revision
Verify current Annex 14 edition, amendment and applicable corrigenda.
Design
Review national and airport requirements; classify visual-aid requirements and prepare the design.
Specify
Select equipment against the approved design.
Install
Install fixtures, cabling and equipment on the airfield.
Test
Electrical, functional and photometric testing, followed by integrated testing.
Measure
Quantify optical and electrical performance against acceptance criteria.
Verify
Carry out operational verification of the complete system.
Document
Compile the compliance file and objective evidence.
Operate
Bring the system into day-to-day operational service.
Maintain
Ongoing inspection, testing and corrective action.
Reassess
Revisit the requirement as the aerodrome, standards or equipment change.
The ICAO Annex 14 AGL Knowledge Hub
This page connects directly with the detailed engineering resources below — covering design, installation, testing, photometry and the individual lighting systems Annex 14 governs.
AGL Design & Electrical Engineering
Series circuits, CCR sizing, transformers, cable design and control.
Open Design Engineering →AGL Installation & Commissioning
From delivered equipment to a verified system.
Open Installation & Commissioning →AGL Testing & Inspection
Electrical, functional and photometric verification.
Open Testing & Inspection →EASA CS-ADR-DSN AGL Compliance
See how the European design specification compares with Annex 14.
Open EASA CS-ADR-DSN →Explore the AGL Engineering Knowledge Hub
Fundamentals
Standards & Compliance
Runway, Taxiway & Approach Lighting
Surface Movement & Safety
PAPI
Electrical Engineering & Power
Photometry & Testing
Maintenance, Inspection & Safety
Resources, Documentation & Careers
Frequently Asked Questions
Q1What is ICAO Annex 14?
ICAO Annex 14 is the ICAO Annex dedicated to aerodromes, establishing Standards and Recommended Practices for aerodrome design and operations. Volume I addresses aerodromes and Volume II addresses heliports; for AGL engineering, Volume I is the principal reference.
Q2Is Annex 14 a list of approved lights or equipment?
No. It is a framework, not a parts list or equipment datasheet. It provides the regulatory framework within which runway, taxiway and approach lighting, PAPI, stop bars, runway guard lights, signs, markings, obstacle lighting, electrical and emergency systems are designed and operated. Manufacturer datasheets, project specifications and approved design each define their own part of the picture.
Q3What is the current Annex 14 baseline according to this page?
The page reports that the ICAO Store lists Annex 14, Volume I, 9th Edition, July 2022, including Amendment 18, along with Corrigendum 2 dated 18 March 2026 and Corrigendum 3 dated 8 June 2026. For compliance work, verify the complete current edition, amendments and applicable corrigenda rather than relying on a single number.
Q4What are the key dates for Annex 14 Amendment 18?
According to the page, Amendment 18 was adopted 28 March 2025 and became effective 4 August 2025, with aerodrome design, visual aids and apron management provisions applicable from 27 November 2025. Provisions on ground handling apply from 26 November 2026, and the new obstacle limitation surfaces from 21 November 2030.
Q5Which visual-aid changes does Amendment 18 include?
ICAO's summary lists runway distance remaining signs (RDRS), harmonized CAT II lighting requirements, main beam average intensity of lights, threshold marking on paved runways, closed-runway lighting and unserviceability signs. Several lighting provisions previously keyed to an RVR below 350 m are re-keyed to 300 m. Confirm wording, clause numbers and national differences against the consolidated current text.
Q6What is the difference between a Standard and a Recommended Practice?
A Standard is a provision considered necessary for the safety or regularity of international air navigation, to which Contracting States are expected to conform. A Recommended Practice is guidance ICAO considers desirable. They do not carry the same weight, so compliance documentation should distinguish them, along with notes, guidance material, national implementation and airport-specific requirements.
Q7Does an ICAO requirement automatically become the national requirement?
No. ICAO establishes SARPs but implementation occurs through States. For an Indian airport project the engineer must also consider DGCA and AAI requirements, national regulations, airport specifications, the approved aerodrome design and project contract requirements. Where a State has notified a difference from an ICAO Standard, the national requirement governs, and the page suggests checking published differences such as AIP GEN 1.7 for India.
Q8What must a State do if it cannot comply with an ICAO Standard?
A State that cannot comply with a Standard must notify the difference to ICAO under Article 38 of the Chicago Convention.
Q9What aerodrome factors affect AGL design under Annex 14?
Before finalizing the lighting arrangement, establish the runway type, approach type, aircraft operating characteristics, aerodrome reference code, visibility and operational requirements, and instrument or non-instrument operation. An AGL engineer should never select a lighting system independently of the aerodrome design.
Q10What does Annex 14 say about runway lighting?
Annex 14 establishes requirements for runway visual aids according to the applicable runway and operational characteristics, covering elements such as edge, centreline and threshold lighting. Exact values should always be taken from the current applicable Annex 14 provision and the approved design.
Q11What does ICAO Annex 14 say about runway lighting?
Annex 14 Volume I specifies the runway lights required for each runway type and approach category, with their colours, arrangement and intensity. The State's adopted regulation and approved design decide the details.
Q12What does ICAO Annex 14 say about taxiway lighting?
It specifies taxiway edge, centerline and stop bar provisions, with colours and guidance functions, and expects them to support safe surface movement in low visibility.
Q13What does ICAO Annex 14 say about PAPI?
It defines the PAPI as the visual approach slope system, with its light units, siting, aiming-angle approach, tolerances and photometric characteristics, with a smaller 2-unit form for some aerodromes.
Q14What is ICAO Doc 9157?
ICAO Doc 9157 is the Aerodrome Design Manual, a multi-part guidance series supporting Annex 14. Part 4 covers visual aids and Part 5 covers electrical systems. It is guidance, not a Standard.
Engineering & Expert Notes
Annex 14 Is a Framework
PrincipleIt sets standards and recommended practices. Detailed equipment performance sits in other documents.
Check the Amendment Status
CurrencyUse the current edition and note any amendments applicable to your project.
Distinguish Standards From Recommendations
TerminologyThe wording determines what is mandatory and what is advisory.
Verify Photometry and Colour Where Specified
VerificationEvidence from tests supports compliance claims.
Allow for State Differences
NationalStates may implement requirements differently. Check regulatory material for your location.
Document Interpretations
RecordsIf a requirement is interpreted, record the reasoning and approvals.
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Please read before relying on any content on this page or on any record downloaded from it.
- Purpose and intended users. This page is an independent educational and informational reference for competent, suitably trained and authorised airfield ground lighting (AGL) and aerodrome personnel. It is not professional engineering, legal or regulatory advice, and using it creates no professional or client relationship. Learning-path and Academy references describe stages of learning only and are not a certification, accreditation or authorisation.
- Safety. Work on series circuits, constant current regulators (CCRs), isolating transformers, cables, connectors and lighting fixtures can be fatal. Always apply the aerodrome’s permit-to-work and isolation/LOTO procedures, prove dead, use correctly rated instruments and PPE, and follow the manufacturer’s instructions. Nothing here authorises work on live equipment or the bypassing of any safety device or interlock.
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