Navigate / EASA

Appendix 5a — General guidelines

ED Decision 2020/020/R

SYLLABI STRUCTURE

This guidance material provides explanatory material on how to read the tables in the appendices contained in Subpart A of the AMC & GM to Part-PERS.

Four tables are provided:

(a)       Basic training — Shared (Appendix 1a);

(b)       Basic training — Streams (Appendix 2a);

(c)       Qualification training — Shared (Appendix 3a); and

(d)       Qualification training — Streams (Appendix 4a).

The tables have the following structure:

EASA EAR figure

Figure 1: Structure of tables

(a)       Granularity table (Appendix 4a only)

The granularity table indicates the stream(s) with which the objectives are associated. Where objectives are common to multiple streams, it is necessary to only include the objective once in the ATSEP training syllabus.

(b)       ATSEP unique objective identifier (UOID)

This is a unique identifier for each objective. Where objectives are repeated across multiple streams, the UOID is linked to the parent domain.

The structure of the UOID is the following:

AREA.DOMAIN.SUBJECT_topic#.subtopic#.objective#

An example of a UOID decoding for ATSEP.QLF.SUR.PSR_1.2.1:

             ATSEP: fixed field that indicates the training area;

             QLF.SUR.: phase of training (qualification) and domain (surveillance);

             (Note: basic training uses only ‘BAS’ without a second field);

             PSR: subject (primary surveillance radar);

             _1: topic number (PSR);

             .2: subtopic number (antenna (PSR)); and

        .1: objective number (1).

(c)       Training objectives

Each training objective contains three mandatory elements:

(1)           Corpus

A description of the required performance. It always contains an action verb at the beginning of the sentence to ensure that the outcome is observable. The action verb is always associated with a defined taxonomy.

The tables at the end of this section list action verbs and their associated taxonomy levels. Those verbs and levels are used or may be used for training objectives.

(2)           Taxonomy Level

A numerical representation of the classification of the action verb.

(i)        Level 1: basic knowledge of the subject. It is the ability to remember essential points, memorise data, and retrieve it.

(ii)       Level 2: the ability to understand and discuss the subject matter intelligently in order to describe and act on certain objects and events.

(iii)      Level 3: thorough knowledge of the subject and the ability to apply it with accuracy. The ability to make use of the repertoire of knowledge to develop plans and activate them.

(iv)      Level 4: the ability to establish a line of action within a unit of known applications by following the correct chronology and the adequate method to resolve a problem situation. This involves integrating known applications into a familiar situation.

(v)       Level 5: the ability to analyse new situations in order to elaborate and apply one or another relevant strategy to solve a complex problem. The defining feature is that the situation is qualitatively different to those previously met, requiring judgement and evaluation of options.

The content illustrates and details performance.

When the items are in a list, each of them is to be addressed as a minimum.

‘e.g.’ is used to indicate optional content. All content following ‘e.g.’ is provided to illustrate the type of content that could be used to meet the objective.

When there is no mandatory content, the objective has to be performed according to the action verb.

Where content refers to other documents (e.g. ICAO SARPs, EU regulations, etc.), users should take care to use the most recent version(s) of the referenced document(s) or its/their parts.

(d)       Domain

The domain is indicated through white text on blue background.

The following domains are defined:

QLF.SHR                     SHARED (common part for all qualification domains);

QLF.COM                  COMMUNICATION;

QLF.NAV                   NAVIGATION;

QLF.SUR                    SURVEILLANCE;

QLF.DPR                    DATA PROCESSING; and

QLF.SMC                   SYSTEM MONITORING AND CONTROL.

In addition, basic training is also considered to be a domain in the tables:

BAS                 BASIC.

(e)       Subject

The subject is indicated through black text on dark grey background.

A subject structures the domain into smaller elements.

(f)        Topic

The topic is indicated through black text on mid grey background.

A topic structures the subject into smaller elements.

(g)       Subtopic

The subtopic is indicated through black text on light grey background.

A subtopic structures the topic into smaller elements.

(h)       Action verbs

The tables below list action verbs and their associated taxonomy levels that are used in training objectives.

Definition of verbs — Level 1

Verb

Definition

Example

Define

State what it is and what its limits are; state the definition.

Define airborne safety nets.

Draw

Produce a picture, pattern, or diagram.

Draw the MLAT system architecture.

List

Say one after the other.

List the most common weather messages.

Name

Give the name of objects or procedures.

Name a range of air-ground aviation-related network concepts.

Recognise

Know what it is, because you have seen it before.

Recognise surveillance information on a display.

State

Say or write in a formal or definite way.

State the function of a network management system.

 

Definition of verbs — Level 2

Verb

Definition

Example

Characterise

Describe the quality of features in something.

Characterise navigation methods.

Consider

Think carefully about it.

Consider the benefits of Critical Incident Stress Management (CISM).

Demonstrate

Describe and explain. Logically or mathematically, prove the truth of the statement.

Demonstrate the use of middleware in an ATM environment.

Describe

Say what it is like or what happened.

Describe the elements of Global Navigation Satellite System (GNSS) in Europe.

Differentiate

Show the difference between things.

Differentiate conventional navigation from area navigation.

Explain

Give details about something or describe so that it can be understood.

Explain the function of FDP.

Take account of

Take into consideration before deciding.

Take account of hardware/software compatibility.

 

Definition of verbs — Level 3

Verb

Definition

Example

Apply

Use something in a situation or activity.

Apply the principles of layers.

Appreciate

Understand a situation and know what is involved in a problem-solving situation, to state a plan without applying it.

Appreciate how to troubleshoot a network.

Calculate

Discover from information you already have by arithmetic; to think about a possible cause of action in order to form an opinion or decide what to do.

Calculate parameters of a line.

Check

Make sure the information is correct (satisfactory).

Check the conformity of a system to ITU and national regulation.

Decode

Turn into ordinary writing, decipher.

Decode a typical OLDI message.

Estimate

Form an approximate judgement of a number, form an opinion.

Estimate the impact of security and integrity failure to the operational service.

Identify

Associate oneself inseparably with, establish the identity.

Identify the major elements of the ADS-C system.

Operate

Conduct work on equipment.

Operate measuring equipment.

Perform

Carry into effect, go through, execute.

Perform measurements with generic radio test equipment.

Use

Employ for a purpose, handle as instrument, put into operation.

Use appropriate vocabulary to communicate effectively on technical matters.

 

Definition of verbs — Level 4

Verb

Definition

Example

Adjust

Change to a new position, value or setting.

Adjust a generic radio receiver.

Analyse

Examine minutely the constitution of.

Analyse the block diagram of a generic radio receiver.

Justify

Show the rightness of a choice or of an option.

Justify the occasions when it is necessary to downgrade an ILS facility performance category.

Relate

Establish link with.

Relate VOR station design to operational requirement.

 

Definition of verbs — Level 5

Verb

Definition

Example

Interpret

Decide on the meaning or significance of something when there is a choice.

Interpret ILS facility performance categories.

 

(i)        Acronyms

The following abbreviations are used in the tables:

AAIM

Aircraft Autonomous Integrity Monitoring

ABAS

Aircraft-Based Augmentation System

ACARS

Aircraft Communications Addressing and Reporting System

ACAS

Airborne Collision Avoidance System

ACC

Area Control Centre

A/D

Analogue/Digital

ADEX-P

ATS Data Exchange Presentation

ADS

Automatic Dependent Surveillance

ADS B

ADS — Broadcast

ADS C

ADS — Contract

ADF

Automatic Direction Finder

AFDX

Avionics Full-duplex Ethernet Switch

AFTN

Aeronautical Fixed Telecommunications Network

AGC

Automatic Gain Control

AIC

Aeronautical Information Circular

AIDC

ATS Interfacility Data Communications

AIP

Aeronautical Information Publication

AIRAC

Aeronautical Information Regulation and Control

AIS

Aeronautical Information Services

ALARP

As Low As Reasonably Practicable

AMAN

Arrival Manager

AMHS

Aeronautical Message Handling System

AMSS

Automatic Message Switching System

ANS

Air Navigation Services

ANSP

ANS Provider

APV

Approach Procedure with Vertical guidance

APW

Area Proximity Warning

ARINC

Aeronautical Radio Incorporated

ARTAS

ATC Radar Tracker and Server

ASAS

Airborne Separation Assistance/Assurance System

ASM

Airspace Management

ASMGCS

Advanced SMGCS

ASTERIX

All-purpose Structured EUROCONTROL Radar Information Exchange

ATC

Air Traffic Control

ATFCM

Air Traffic Flow and Capacity Management

ATIS

Automatic Terminal Information Service

ATM

Air Traffic Management

ATN

Aeronautical Telecommunication Network

ATS

Air Traffic Services

ATSEP

Air Traffic Safety Electronics Personnel

AUGUR

EUROCONTROL RAIM Prediction Tool

BATAP

‘Type-B’ Application-to-Application Protocol

BDS

Binary Data Store

BER

Bit Error Rate

BITE

Built-In Test Equipment

B-RNAV

Basic-RNAV

CAA

Civil Aviation Authority

CB

Cumulonimbus

CBT

Computer-Based Training

CDM

Collaborative Decision-Making

CDTI

Cockpit Display of Traffic Information

CFMU

Central Flow Management Unit

CIDIN

Common ICAO Data Interchange Network

CISM

Critical Incident Stress Management

CIV

Civil

CLAM

Cleared flight Level Adherence Monitoring

CLIMAX

Multi-station carrier offset mode, with voting override

CMS

Control and Monitoring System

CNS/ATM

Communication Navigation and Surveillance/Air Traffic Management

CORA

Conflict Resolution Advisory

CORBA

Common Object Request Broker Architecture

COTS

Commercial off-the-Shelf

CPDLC

Controller-Pilot Data Link Communications

CRT

Cathode Ray Tube

CSU

Control Sector Unit

CTR

Control Zone

CVOR

Conventional VOR

CWP

Controller Work Position

DCL

Departure Clearance

DDF

Doppler DF

DDM

Difference of Depth of Modulation

DF

Direction Finding

DLIC

Data Link Initiation Capability

DMAN

Departure Manager

DME

Distance Measuring Equipment

DPSK

Differential Phase Shift Keying

DTMF

Dual Tone Modulation-Frequency

DVOR

Doppler VOR

EAD

European Aeronautical Database

EAN

European ANSP Network

EASA

European Aviation Safety Agency

ECAC

European Civil Aviation Conference

EFQM

European Foundation for Quality Management

EGNOS

European Geostationary Navigation Overlay Service

EGPWS

Enhanced Ground Proximity Warning System

EHS

Enhanced Mode S

EHT

Extremely High Tension

EJB

Enterprise Java Bean

ELS

Elementary Mode S

EMC

Electromagnetic Compatibility

EMI

Electromagnetic Interference

ETFMS

Enhanced Tactical FMS

EU

European Union

EUROCAE

European Civil Aviation Electronics

EUROCONTROL

European Organisation for the Safety of Air Navigation

FAA

Federal Aviation Administration (US)

FANS

Future Air Navigation Systems

FDP

Flight Data Processing

FDPS

FDP System

FFM

Far Field Monitor

FHA

Functional Hazard Assessment

FIR

Flight Information Region

FMS

Flight Management System

FMTP

Flight Plan Messaging Transport Protocol

FoM

Figures of Merit

FPL

(Filed) Flight Plan

FRUIT

False Reply Unsynchronised in Time

FUA

Flexible Use of Airspace

GALILEO

Satellite radio navigation system

GBAS

Ground-Based Augmentation System

GLONASS

GLObal’naya NAvigatsionnaya Sputnikovaya Sistema (Global Navigation Satellite System)

GNSS

Global Navigation Satellite System

GP

Glide Path

GPS

Global Positioning System

GRAS

Ground-based Regional Augmentation System

GSA

GNSS Supervisory Authority

GTC

Gain/Time Control

HF

High Frequency

HFDL

High Frequency Data Link

HMI

Human-Machine Interface

HPA

High Power Amplifier

HSI

Horizontal Situation Indication

HV

High Voltage

HW

Hardware

Hz

Hertz

ICAO

International Civil Aviation Organization

IDF

Interferometric DF

IF

Intermediate Frequency

IFF

Identification Friend/Foe

IFPS

(Integrated) Initial Flight Plan Processing System

ILS

Instrument Landing System

INS

Inertial Navigation System

I/O

Input/Output

IP

Internet Protocol

IRS

Inertial Reference System

IRVR

Instrument Runway Visual Range

I/Q

In phase and Quadrature

ISDN

Integrated Services Digital Network

ISLS

Interrogator Side Lobe Suppression

IISLS

Improved Interrogator Side Lobe Suppression

iTEC

Interoperability Through European Collaboration

ITU

International Telecommunication Union

ISO

International Standards Organisation

LAM

Local Area Multilateration

LAN

Local Area Network

LAPB

Link Access Protocol, Balanced

LCD

Liquid-Crystal Display

LLZ

Localiser

LNA

Low Noise Amplifier

LVP

Low Visibility Procedures

MDS

Minimum Detectable Signal

MET

Meteorology

METAR

Meteorological Actual Report

MFC

Multi-Frequency Coding

MHz

Megahertz

MIL

Military

MLAT

Multilateration

MLS

Microwave Landing System

MOTNE

Meteorological Operational Telecommunications Network Europe

MRP

Multi-radar Processing

MRT

Multi-radar Tracker

MSAW

Minimum Safe Altitude Warning

MSSR

Mono-pulse SSR

MTBF

Mean Time Between Failure

MTCD

Medium-Term Conflict Detection

MTD

Moving Target Detection

NAVAID

Navigation(al) Aid

ND

Navigation Display

NEAN

North European ADS-B Network

NDB

Non-Directional Beacon

NOP

Network Operations Plan

NOTAM

Notice to Airmen

NPA

Non-Precision Approach

NRA

Non-Radar Area

NSA

National Supervisory Authority

OJTI

On-The-Job Training Instructor

OLDI

On-Line Data Interchange

OS

Operating System

OSI

Open System Interconnection

OST

On-site Training

OTM

Object Transaction Monitor

PA

Precision Approach

PABX

Private Automatic Branch Exchange

PBN

Performance-Based Navigation

PCM

Pulse Code Modulation

PD

Probability of Detection

PENS

Pan-European Fixed Network Services

PFD

Primary Flight Display

PPI

Plan Position Indicator

PRF

Pulse Repetition Frequency

P-RNAV

Precision RNAV

PSD

Phase Sensitive Detector

PSSA

Preliminary System Safety Assessment

PSR

Primary Surveillance Radar

QoS

Quality of Service

QNH

Q-code for atmospheric pressure at sea level

Qsig

Quality of signal

RAIM

Receiver Autonomous Integrity Monitoring

RAPNET

(European) Regional Aeronautical Packet switched Network (CBN + DAKOS)

RAPS

Recording, Analysis, Playback and Simulation system for radar data (COMSOFT)

RDP

Radar Data Processing

RCA

Remote Client Application

RF

Radio Frequency

RMI

Relative Magnetic Indicator

RNAV

Area Navigation

RNP

Required Navigation Performance

RPL

Repetitive Flight Plan

RSLS

Receiver Sidelobe Suppression

R/T

Radiotelephony

RTCA

Radio Technical Commission for Aeronautics

RUP

Rational Unified Process

RVR

Runway Visual Range

RX

Receiver

SAR

Specific Energy Absorption Rate

SARPS

Standards And Recommended Practices

SASS

Surveillance Analysis Support System

SASS-C

SASS-Centre

SASS-S

SASS-Sensor

SATCOM

Satellite Communications

SBAS

Satellite-Based Augmentation System

SCAS

Surveillance Coverage Analysis Suite

SCAT-1

Special Category 1

SDM

Sum of Depth of Modulation

SDP

Surveillance Data Processing

S/E

System/Equipment

SELCAL

Selective Calling

SESAR

Single European Sky AM Research

SID

Standard Instrument Departure

SITA

Société Internationale de Télécommunications Aéronautiques (France)

SMC

System Monitoring and Control

SMR

Surface Movement Radar

SMS

Safety Management System

S/N

Signal/Noise

SNOWTAM

NOTAM on Snow conditions

SNMP

Simple Network Management Protocol

SPI

Special Pulse Identification or Special Position Identification Pulse (SSR)

SRC

Safety Regulation Commission (EUROCONTROL)

SSA

System Safety Assessment

SSR

Secondary Surveillance Radar

STC

Sensitivity Time Control

STCA

Short-Term Conflict Alert

SV

Supervisor

SW

Software

SWALs

Software Assurance Levels

 

 

SWIM

System Wide Information Management

SWR

Standing Wave Ratio

TACAN

UHF Tactical Air Navigation aid

TAF

Terminal Area Forecast

TCAS

Transponder Collision Avoidance System

TCP

Transmission Control Protocol

TDOA

Time Difference on Arrival

TFT

Thin Film Transistor

TIS

Traffic Information Service

TMA

Terminal Area

TRM

Team Resource Management

TX

Transmitter

UAT

Universal Access Transceiver

UBSS

UNIX Basic System Software

UHF

Ultra High Frequency

UPS

Uninterruptible Power Supply

UTA

Upper (Traffic) Control Area

VCS

Voice Communications System

VDF

VHF DF Station

VDL

VHF Digital/Data Link

VESDA

Very Early Smoke Detection Alarm

VHF

Very High Frequency

VOLMET

Routine Voice broadcasts for Meteorological Information

VOR

VHF Omnidirectional Radio Range

VORTAC

VOR and TACAN combination

WAAS

Wide Area Augmentation System (US)

WAM

Wide Area Multilateration

WAN

Wide Area Network

WGS84

World Geodetic System 84

 



[1]     The published date represents the date when the consolidated version of the document was generated.

[2]     Euro-Lex, Important Legal Notice: http://eur-lex.europa.eu/content/legal-notice/legal-notice.html.

[3]     This is the date of application (i.e. the date from which an act or a provision in an act produces its full legal effects) as defined in the relevant cover regulation article. Some provisions of the regulations though may be applicable at a later date (deferred applicability). Besides, there may be some opt-outs (derogations from certain provisions) notified by the Member States.

[4]        Regulation (EU) 2017/373 shall apply from 2 January 2020. However:

- in respect of the Agency, Article 4(1), (2), (5), (6) and (8) and Article 5 shall apply from the date of entry into force of this Regulation;
- in respect of data services providers, Article 6 shall apply in any case from 1 January 2019 and, where such a provider applies for and is granted a certificate in accordance with Article 6, from the date of entry into force of this Regulation.

[5]     OJ L 79, 19.3.2008, p. 1.

[6]     OJ L 96, 31.3.2004, p. 10.

[7]     OJ L 96, 31.3.2004, p. 20.

[8]     Commission Implementing Regulation (EU) No 1034/2011 of 17 October 2011 on safety oversight in air traffic management and air navigation services and amending Regulation (EU) No 691/2010 (OJ L 271, 18.10.2011, p. 15).

[9]     Commission Implementing Regulation (EU) No 1035/2011 of 17 October 2011 laying down common requirements for the provision of air navigation services and amending Regulations (EC) No 482/2008 and (EU) No 691/2010 (OJ L 271, 18.10.2011, p. 23).

[10]    Regulation (EC) No 549/2004 of the European Parliament and of the Council of 10 March 2004 laying down the framework for the creation of the single European Sky (OJ L 96, 31.3.2004, p. 1).

[11]    Commission Regulation (EU) No 965/2012 of 5 October 2012 laying down technical requirements and administrative procedures related to air operations pursuant to Regulation (EC) No 216/2008 of the European Parliament and of the Council (OJ L 296, 25.10.2012, p. 1).

[12]    Commission Regulation (EU) No 1178/2011 of 3 November 2011 laying down technical requirements and administrative procedures related to civil aviation aircrew pursuant to Regulation (EC) No 216/2008 of the European Parliament and of the Council (OJ L 311, 25.11.2011, p. 1).

[13]    Commission Regulation (EU) No 139/2014 of 12 February 2014 laying down requirements and administrative procedures related to aerodromes pursuant to Regulation (EC) No 216/2008 of the European Parliament and of the Council (OJ L 44, 14.2.2014, p. 1).

[14]    Commission Regulation (EU) 2015/340 of 20 February 2015 laying down technical requirements and administrative procedures relating to air traffic controllers' licences and certificates pursuant to Regulation (EC) No 216/2008 of the European Parliament and of the Council, amending Commission Implementing Regulation (EU) No 923/2012 and repealing Commission Regulation (EU) No 805/2011 (OJ L 63, 6.3.2015, p. 1).

[15]    Commission Implementing Regulation (EU) No 923/2012 of 26 September 2012 laying down the common rules of the air and operational provisions regarding services and procedures in air navigation and amending Implementing Regulation (EU) No 1035/2011 and Regulations (EC) No 1265/2007, (EC) No 1794/2006, (EC) No 730/2006, (EC) No 1033/2006 and (EU) No 255/2010 (OJ L 281, 13.10.2012, p. 1).

[16]    Commission Regulation (EC) No 482/2008 of 30 May 2008 establishing a software safety assurance system to be implemented by air navigation service providers and amending Annex II to Regulation (EC) No 2096/2005 (OJ L 141, 31.5.2008, p. 5).

[17]    Commission Regulation (EU) No 677/2011 of 7 July 2011 laying down detailed rules for the implementation of air traffic management (ATM) network functions and amending Regulation (EU) No 691/2010 (OJ L 185, 15.7.2011, p. 1).

[18]    Commission Implementing Regulation (EU) 2016/1377 of 4 August 2016 laying down common requirements for service providers and the oversight in air traffic management/air navigation services and other air traffic management network functions, repealing Regulation (EC) No 482/2008, Implementing Regulations (EU) No 1034/2011 and (EU) No 1035/2011 and amending Regulation (EU) No 677/2011 (OJ L 226, 19.8.2016, p. 1).

[19]    Regulation (EC) No 216/2008 of the European Parliament and the Council of 20 February 2008 on common rules in the field of civil aviation and establishing a European Aviation Safety Agency, and repealing Council Directive 91/670/EEC, Regulation (EC) No 1592/2002 and Directive 2004/36/EC (OJ L 79, 19.3.2008, p. 1).

[20]    Regulation (EC) No 549/2004 of the European Parliament and of the Council of 10 March 2004 laying down the framework for the creation of the single European sky (the framework Regulation) - Statement by the Member States on military issues related to the single European sky (OJ L 96, 31.3.2004, p. 1).

[21]    Regulation (EC) No 550/2004 of the European Parliament and of the Council of 10 March 2004 on the provision of air navigation services in the single European sky (the service provision Regulation) (OJ L 96, 31.3.2004, p. 10).

[22]    Regulation (EC) No 551/2004 of the European Parliament and of the Council of 10 March 2004 on the organisation and use of the airspace in the single European sky (the airspace Regulation) - Commission statement (OJ L 96, 31.3.2004, p. 20).

[23]    Regulation (EC) No 552/2004 of the European Parliament and of the Council of 10 March 2004 on the interoperability of the European Air Traffic Management network (the interoperability Regulation) (OJ L 96, 31.3.2004, p. 26).

[24]    As prescribed by the competent authority.

[25]    ATS covers alerting service.

[26]    Where necessary.

[27]    If the competent authority considers it necessary to establish additional requirements.

[28]    As prescribed by the competent authority.

[29]    Where necessary.

[30]    As prescribed by the competent authority.

[31]    Where necessary.

3       Design, documentation and validation of flight procedures includes maintenance and periodic review activities.

[32]    Commission Regulation (EU) No 677/2011 of 7 July 2011 laying down detailed rules for the implementation of air traffic management (ATM) network functions and amending Commission Regulation (EU) No 691/2010 (OJ L 185, 15.7.2011, p. 1).

[33]    Commission Implementing Regulation (EU) No 390/2013 of 3 May 2013 laying down a performance scheme for air navigation services and network functions (OJ L 128, 9.5.2013, p. 1).

[35]    Directive 95/46/EC of the European Parliament and of the Council of 24 October 1995 on the protection of individuals with regard to the processing of personal data and on the free movement of such data (OJ L 281, 23.11.1995, p. 31).

[36] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[37] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[38] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[39] To be included if the visibility or the runway visual range is < 1 500 m for up to a maximum of four runways.

[40] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[41] For automated reports only.

[42] ‘Heavy’ is used to indicate ‘tornado’ or ‘waterspout’; ‘moderate’ (no qualifier) to indicate ‘funnel cloud not reaching the ground’.

[43] For automated reports only.

[44] For automated reports only.

[45] For automated reports only.

[46] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[47] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[48] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[49] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[50] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[51] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[52] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[53] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[54] For automated reports only.

[55] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[56] In the case of automated reports, solidi (‘///’) may replace the relevant cloud type, as appropriate, dependent on the capability of the automatic observing system. Furthermore, solidi may replace cloud amount and/or cloud height of reported CB or TCU layer.

[57] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[58] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[59] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[60] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[61] For automated reports only.

[62] For automated reports only.

[63] For automated reports only.

[64] For automated reports only.

[65] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[66] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[67] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[68] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[69] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[70] Replacing visibility, runway visual range, present weather, and cloud elements, when applicable.

[71] To be included whenever applicable. No qualifier for moderate intensity.

[72] Up to four cloud layers.

[73] Consisting of up to a maximum of four temperatures (two maximum temperatures and two minimum temperatures).

[74] Replacing visibility, runway visual range, forecast weather and cloud elements, when applicable.

[75] Used only when SIGMET/AIRMET is issued to indicate that a test or an exercise is taking place. When the word ‘TEST’ or the abbreviation ‘EXER’ is included, the message may contain information that should not be used operationally or will otherwise end immediately after the word ‘TEST’.

[76] Used for unnamed tropical cyclones.

[77] In the case of volcanic ash cloud covering more than one area within the FIR, these elements can be repeated, as necessary. Each location and forecast position are to be preceded by an observed or forecast time.

[78] In the case of cumulonimbus clouds associated with a tropical cyclone covering more than one area within the FIR, these elements can be repeated as necessary. Each location and forecast position must be preceded by an observed or forecast time.

[79] In the case of volcanic ash cloud covering more than one area within the FIR, these elements can be repeated, as necessary. Each location and forecast position are to be preceded by an observed or forecast time.

[80] In the case of cumulonimbus clouds associated with a tropical cyclone covering more than one area within the FIR, these elements can be repeated as necessary. Each location and forecast position must be preceded by an observed or forecast time.

[81] For SIGMET for radioactive cloud, only within (WI) is to be used for theelements ‘location’ and ‘forecast position’.

[82] The number of coordinates are to be kept to a minimum and should not normally exceed seven.

[83] Only for SIGMET for tropical cyclones.

[84] Only for SIGMET for radioactive cloud. A radius of up to 30 kilometres (or 16 nautical miles) from the source and a vertical extent from surface (SFC) to the upper limit of the flight information region/upper flight information region (FIR/UIR) or control area (CTA) is to be applied.

[85] Only for SIGMET for tropical cyclones.

[86] In the case of volcanic ash cloud covering more than one area within the FIR, these elements can be repeated, as necessary. Each location and forecast position are to be preceded by an observed or forecast time.

[87] The elements ‘forecast time’ and ‘forecast position’ are not to be used in conjunction with the element ‘movement or expected movement’.

[88] For SIGMET for radioactive cloud, only stationary (STNR) is to be used for the element ‘movement or expected movement’.

[89] In the case of volcanic ash cloud covering more than one area within the FIR, these elements can be repeated, as necessary. Each location and forecast position are to be preceded by an observed or forecast time.

[90] In the case of volcanic ash cloud covering more than one area within the FIR, these elements can be repeated, as necessary. Each location and forecast position are to be preceded by an observed or forecast time.

[91] In the case of cumulonimbus clouds associated with a tropical cyclone covering more than one area within the FIR, these elements can be repeated as necessary. Each location and forecast position must be preceded by an observed or forecast time.

[92] The elements ‘forecast time’ and ‘forecast position’ are not to be used in conjunction with the element ‘movement or expected movement’.

[93] Only for SIGMET for tropical cyclones.

[94] The term ‘CB’ is to be used when the forecast position for the cumulonimbus cloud is included.

[95] In the case of volcanic ash cloud covering more than one area within the FIR, these elements can be repeated, as necessary. Each location and forecast position are to be preceded by an observed or forecast time.

[96] In the case of cumulonimbus clouds associated with a tropical cyclone covering more than one area within the FIR, these elements can be repeated as necessary. Each location and forecast position must be preceded by an observed or forecast time.

[97] For SIGMET for radioactive cloud, only within (WI) is to be used for theelements ‘location’ and ‘forecast position’.

[98] The elements ‘forecast time’ and ‘forecast position’ are not to be used in conjunction with the element ‘movement or expected movement’.

[99] The forecast position for cumulonimbus (CB) cloud occurring in connection with tropical cyclones relates to the forecast time of the tropical cyclone centre position, not to the end of the validity period of the SIGMET.

[100] The number of coordinates are to be kept to a minimum and should not normally exceed seven.

[101] Only for SIGMET for volcanic ash.

[102] Only for SIGMET for radioactive cloud. A radius of up to 30 kilometres (or 16 nautical miles) from the source and a vertical extent from surface (SFC) to the upper limit of the flight information region/upper flight information region (FIR/UIR) or control area (CTA) is to be applied.

[103] Only for SIGMET for tropical cyclones.

[104] To be used for more than one volcanic ash clouds or cumulonimbus clouds associated with a tropical cyclone simultaneously affecting the FIR concerned.’

[105] To be used for more than one volcanic ash clouds or cumulonimbus clouds associated with a tropical cyclone simultaneously affecting the FIR concerned.’

[106] Only for SIGMET for volcanic ash.

[107] Used only when the message is issued to indicate that a test or an exercise is taking place. When the word ‘TEST’ or the abbreviation ‘EXER’ is included, the message may contain information that should not be used operationally or will otherwise end immediately after the word ‘TEST’.

[108] The term ‘resuspended’ to be used for volcanic ash deposits raised by the wind.

[109] If a volcanic ash cloud is reported (e.g. AIREP) but not identifiable from the satellite data.

[110] A straight line between two points drawn on a map in the Mercator projection or a straight line between two points which crosses lines of longitude at a constant angle.

[111] Up to four selected layers.

[112] A straight line between two points drawn on a map in the Mercator projection or a straight line between two points which crosses lines of longitude at a constant angle.

[113] Up to four selected layers.

[114] A straight line between two points drawn on a map in the Mercator projection or a straight line between two points which crosses lines of longitude at a constant angle.

[115] Up to four selected layers.

[116] The term ‘resuspended’ to be used for volcanic ash deposits raised by the wind.

[117] To be included (as free text)

[118] To be included (as free text) where space in the Remarks section allows.

[119] Used only when the message is issued to indicate that a test or an exercise is taking place. When the word ‘TEST’ or the abbreviation ‘EXER’ is included, the message may contain information that should not be used operationally or will otherwise end immediately after the word ‘TEST’.

[120] In the case of CB clouds associated with a tropical cyclone covering more than one area within the area of responsibility, this element can be repeated, as necessary.

[121] The number of coordinates should be kept to a minimum and should not normally exceed seven.

[122]  Commission Regulation (EU) No 255/2010 of 25 March 2010 laying down common rules on air traffic flow management (OJ L 80, 26.3.2010, p. 10).

[123]  Commission Regulation (EC) No 2150/2005 of 23 December 2005 laying down common rules for the flexible use of airspace (OJ L 342, 24.12.2005, p. 20).


[1]     The published date represents the date when the consolidated version of the document was generated.

[2]     Euro-Lex, Important Legal Notice: http://eur-lex.europa.eu/content/legal-notice/legal-notice.html.

[3]     This is the date of application (i.e. the date from which an act or a provision in an act produces its full legal effects) as defined in the relevant cover regulation article. Some provisions of the regulations though may be applicable at a later date (deferred applicability). Besides, there may be some opt-outs (derogations from certain provisions) notified by the Member States.

[4]        Regulation (EU) 2017/373 shall apply from 2 January 2020. However:

- in respect of the Agency, Article 4(1), (2), (5), (6) and (8) and Article 5 shall apply from the date of entry into force of this Regulation;
- in respect of data services providers, Article 6 shall apply in any case from 1 January 2019 and, where such a provider applies for and is granted a certificate in accordance with Article 6, from the date of entry into force of this Regulation.

[5]     OJ L 79, 19.3.2008, p. 1.

[6]     OJ L 96, 31.3.2004, p. 10.

[7]     OJ L 96, 31.3.2004, p. 20.

[8]     Commission Implementing Regulation (EU) No 1034/2011 of 17 October 2011 on safety oversight in air traffic management and air navigation services and amending Regulation (EU) No 691/2010 (OJ L 271, 18.10.2011, p. 15).

[9]     Commission Implementing Regulation (EU) No 1035/2011 of 17 October 2011 laying down common requirements for the provision of air navigation services and amending Regulations (EC) No 482/2008 and (EU) No 691/2010 (OJ L 271, 18.10.2011, p. 23).

[10]    Regulation (EC) No 549/2004 of the European Parliament and of the Council of 10 March 2004 laying down the framework for the creation of the single European Sky (OJ L 96, 31.3.2004, p. 1).

[11]    Commission Regulation (EU) No 965/2012 of 5 October 2012 laying down technical requirements and administrative procedures related to air operations pursuant to Regulation (EC) No 216/2008 of the European Parliament and of the Council (OJ L 296, 25.10.2012, p. 1).

[12]    Commission Regulation (EU) No 1178/2011 of 3 November 2011 laying down technical requirements and administrative procedures related to civil aviation aircrew pursuant to Regulation (EC) No 216/2008 of the European Parliament and of the Council (OJ L 311, 25.11.2011, p. 1).

[13]    Commission Regulation (EU) No 139/2014 of 12 February 2014 laying down requirements and administrative procedures related to aerodromes pursuant to Regulation (EC) No 216/2008 of the European Parliament and of the Council (OJ L 44, 14.2.2014, p. 1).

[14]    Commission Regulation (EU) 2015/340 of 20 February 2015 laying down technical requirements and administrative procedures relating to air traffic controllers' licences and certificates pursuant to Regulation (EC) No 216/2008 of the European Parliament and of the Council, amending Commission Implementing Regulation (EU) No 923/2012 and repealing Commission Regulation (EU) No 805/2011 (OJ L 63, 6.3.2015, p. 1).

[15]    Commission Implementing Regulation (EU) No 923/2012 of 26 September 2012 laying down the common rules of the air and operational provisions regarding services and procedures in air navigation and amending Implementing Regulation (EU) No 1035/2011 and Regulations (EC) No 1265/2007, (EC) No 1794/2006, (EC) No 730/2006, (EC) No 1033/2006 and (EU) No 255/2010 (OJ L 281, 13.10.2012, p. 1).

[16]    Commission Regulation (EC) No 482/2008 of 30 May 2008 establishing a software safety assurance system to be implemented by air navigation service providers and amending Annex II to Regulation (EC) No 2096/2005 (OJ L 141, 31.5.2008, p. 5).

[17]    Commission Regulation (EU) No 677/2011 of 7 July 2011 laying down detailed rules for the implementation of air traffic management (ATM) network functions and amending Regulation (EU) No 691/2010 (OJ L 185, 15.7.2011, p. 1).

[18]    Commission Implementing Regulation (EU) 2016/1377 of 4 August 2016 laying down common requirements for service providers and the oversight in air traffic management/air navigation services and other air traffic management network functions, repealing Regulation (EC) No 482/2008, Implementing Regulations (EU) No 1034/2011 and (EU) No 1035/2011 and amending Regulation (EU) No 677/2011 (OJ L 226, 19.8.2016, p. 1).

[19]    Regulation (EC) No 216/2008 of the European Parliament and the Council of 20 February 2008 on common rules in the field of civil aviation and establishing a European Aviation Safety Agency, and repealing Council Directive 91/670/EEC, Regulation (EC) No 1592/2002 and Directive 2004/36/EC (OJ L 79, 19.3.2008, p. 1).

[20]    Regulation (EC) No 549/2004 of the European Parliament and of the Council of 10 March 2004 laying down the framework for the creation of the single European sky (the framework Regulation) - Statement by the Member States on military issues related to the single European sky (OJ L 96, 31.3.2004, p. 1).

[21]    Regulation (EC) No 550/2004 of the European Parliament and of the Council of 10 March 2004 on the provision of air navigation services in the single European sky (the service provision Regulation) (OJ L 96, 31.3.2004, p. 10).

[22]    Regulation (EC) No 551/2004 of the European Parliament and of the Council of 10 March 2004 on the organisation and use of the airspace in the single European sky (the airspace Regulation) - Commission statement (OJ L 96, 31.3.2004, p. 20).

[23]    Regulation (EC) No 552/2004 of the European Parliament and of the Council of 10 March 2004 on the interoperability of the European Air Traffic Management network (the interoperability Regulation) (OJ L 96, 31.3.2004, p. 26).

[24]    As prescribed by the competent authority.

[25]    ATS covers alerting service.

[26]    Where necessary.

[27]    If the competent authority considers it necessary to establish additional requirements.

[28]    As prescribed by the competent authority.

[29]    Where necessary.

[30]    As prescribed by the competent authority.

[31]    Where necessary.

3       Design, documentation and validation of flight procedures includes maintenance and periodic review activities.

[32]    Commission Regulation (EU) No 677/2011 of 7 July 2011 laying down detailed rules for the implementation of air traffic management (ATM) network functions and amending Commission Regulation (EU) No 691/2010 (OJ L 185, 15.7.2011, p. 1).

[33]    Commission Implementing Regulation (EU) No 390/2013 of 3 May 2013 laying down a performance scheme for air navigation services and network functions (OJ L 128, 9.5.2013, p. 1).

[35]    Directive 95/46/EC of the European Parliament and of the Council of 24 October 1995 on the protection of individuals with regard to the processing of personal data and on the free movement of such data (OJ L 281, 23.11.1995, p. 31).

[37] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[38] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[39] To be included if the visibility or the runway visual range is < 1 500 m for up to a maximum of four runways.

[40] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[41] For automated reports only.

[42] ‘Heavy’ is used to indicate ‘tornado’ or ‘waterspout’; ‘moderate’ (no qualifier) to indicate ‘funnel cloud not reaching the ground’.

[43] For automated reports only.

[44] For automated reports only.

[45] For automated reports only.

[46] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[47] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[48] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[49] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[50] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[51] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[52] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[53] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[54] For automated reports only.

[55] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[56] In the case of automated reports, solidi (‘///’) may replace the relevant cloud type, as appropriate, dependent on the capability of the automatic observing system. Furthermore, solidi may replace cloud amount and/or cloud height of reported CB or TCU layer.

[57] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[58] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[59] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[60] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[61] For automated reports only.

[62] For automated reports only.

[63] For automated reports only.

[64] For automated reports only.

[65] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[66] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[67] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[68] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[69] When a meteorological element is temporarily missing, or its value is considered temporarily as incorrect, it is replaced by a solidus (‘/’)

[70] Replacing visibility, runway visual range, present weather, and cloud elements, when applicable.

[71] To be included whenever applicable. No qualifier for moderate intensity.

[72] Up to four cloud layers.

[73] Consisting of up to a maximum of four temperatures (two maximum temperatures and two minimum temperatures).

[74] Replacing visibility, runway visual range, forecast weather and cloud elements, when applicable.

[75] Used only when SIGMET/AIRMET is issued to indicate that a test or an exercise is taking place. When the word ‘TEST’ or the abbreviation ‘EXER’ is included, the message may contain information that should not be used operationally or will otherwise end immediately after the word ‘TEST’.

[76] Used for unnamed tropical cyclones.

[77] In the case of volcanic ash cloud covering more than one area within the FIR, these elements can be repeated, as necessary. Each location and forecast position are to be preceded by an observed or forecast time.

[78] In the case of cumulonimbus clouds associated with a tropical cyclone covering more than one area within the FIR, these elements can be repeated as necessary. Each location and forecast position must be preceded by an observed or forecast time.

[79] In the case of volcanic ash cloud covering more than one area within the FIR, these elements can be repeated, as necessary. Each location and forecast position are to be preceded by an observed or forecast time.

[80] In the case of cumulonimbus clouds associated with a tropical cyclone covering more than one area within the FIR, these elements can be repeated as necessary. Each location and forecast position must be preceded by an observed or forecast time.

[81] For SIGMET for radioactive cloud, only within (WI) is to be used for theelements ‘location’ and ‘forecast position’.

[82] The number of coordinates are to be kept to a minimum and should not normally exceed seven.

[83] Only for SIGMET for tropical cyclones.

[84] Only for SIGMET for radioactive cloud. A radius of up to 30 kilometres (or 16 nautical miles) from the source and a vertical extent from surface (SFC) to the upper limit of the flight information region/upper flight information region (FIR/UIR) or control area (CTA) is to be applied.

[85] Only for SIGMET for tropical cyclones.

[86] In the case of volcanic ash cloud covering more than one area within the FIR, these elements can be repeated, as necessary. Each location and forecast position are to be preceded by an observed or forecast time.

[87] The elements ‘forecast time’ and ‘forecast position’ are not to be used in conjunction with the element ‘movement or expected movement’.

[88] For SIGMET for radioactive cloud, only stationary (STNR) is to be used for the element ‘movement or expected movement’.

[89] In the case of volcanic ash cloud covering more than one area within the FIR, these elements can be repeated, as necessary. Each location and forecast position are to be preceded by an observed or forecast time.

[90] In the case of volcanic ash cloud covering more than one area within the FIR, these elements can be repeated, as necessary. Each location and forecast position are to be preceded by an observed or forecast time.

[91] In the case of cumulonimbus clouds associated with a tropical cyclone covering more than one area within the FIR, these elements can be repeated as necessary. Each location and forecast position must be preceded by an observed or forecast time.

[92] The elements ‘forecast time’ and ‘forecast position’ are not to be used in conjunction with the element ‘movement or expected movement’.

[93] Only for SIGMET for tropical cyclones.

[94] The term ‘CB’ is to be used when the forecast position for the cumulonimbus cloud is included.

[95] In the case of volcanic ash cloud covering more than one area within the FIR, these elements can be repeated, as necessary. Each location and forecast position are to be preceded by an observed or forecast time.

[96] In the case of cumulonimbus clouds associated with a tropical cyclone covering more than one area within the FIR, these elements can be repeated as necessary. Each location and forecast position must be preceded by an observed or forecast time.

[97] For SIGMET for radioactive cloud, only within (WI) is to be used for theelements ‘location’ and ‘forecast position’.

[98] The elements ‘forecast time’ and ‘forecast position’ are not to be used in conjunction with the element ‘movement or expected movement’.

[99] The forecast position for cumulonimbus (CB) cloud occurring in connection with tropical cyclones relates to the forecast time of the tropical cyclone centre position, not to the end of the validity period of the SIGMET.

[100] The number of coordinates are to be kept to a minimum and should not normally exceed seven.

[101] Only for SIGMET for volcanic ash.

[102] Only for SIGMET for radioactive cloud. A radius of up to 30 kilometres (or 16 nautical miles) from the source and a vertical extent from surface (SFC) to the upper limit of the flight information region/upper flight information region (FIR/UIR) or control area (CTA) is to be applied.

[103] Only for SIGMET for tropical cyclones.

[104] To be used for more than one volcanic ash clouds or cumulonimbus clouds associated with a tropical cyclone simultaneously affecting the FIR concerned.’

[105] To be used for more than one volcanic ash clouds or cumulonimbus clouds associated with a tropical cyclone simultaneously affecting the FIR concerned.’

[106] Only for SIGMET for volcanic ash.

[107] Used only when the message is issued to indicate that a test or an exercise is taking place. When the word ‘TEST’ or the abbreviation ‘EXER’ is included, the message may contain information that should not be used operationally or will otherwise end immediately after the word ‘TEST’.

[108] The term ‘resuspended’ to be used for volcanic ash deposits raised by the wind.

[109] If a volcanic ash cloud is reported (e.g. AIREP) but not identifiable from the satellite data.

[110] A straight line between two points drawn on a map in the Mercator projection or a straight line between two points which crosses lines of longitude at a constant angle.

[111] Up to four selected layers.

[112] A straight line between two points drawn on a map in the Mercator projection or a straight line between two points which crosses lines of longitude at a constant angle.

[113] Up to four selected layers.

[114] A straight line between two points drawn on a map in the Mercator projection or a straight line between two points which crosses lines of longitude at a constant angle.

[115] Up to four selected layers.

[116] The term ‘resuspended’ to be used for volcanic ash deposits raised by the wind.

[117] To be included (as free text)

[118] To be included (as free text) where space in the Remarks section allows.

[119] Used only when the message is issued to indicate that a test or an exercise is taking place. When the word ‘TEST’ or the abbreviation ‘EXER’ is included, the message may contain information that should not be used operationally or will otherwise end immediately after the word ‘TEST’.

[120] In the case of CB clouds associated with a tropical cyclone covering more than one area within the area of responsibility, this element can be repeated, as necessary.

[121] The number of coordinates should be kept to a minimum and should not normally exceed seven.

[122]  Commission Regulation (EU) No 255/2010 of 25 March 2010 laying down common rules on air traffic flow management (OJ L 80, 26.3.2010, p. 10).

[123]  Commission Regulation (EC) No 2150/2005 of 23 December 2005 laying down common rules for the flexible use of airspace (OJ L 342, 24.12.2005, p. 20).