TABLE OF CONTENTS

 

TITLE

ITEM

General

 

SUBPART A:

Applicability

 

174.1

Definitions and abbreviations

174.3

Requirement for certification

174.5

Application for certification

174.7

Issue of certificate

174.9

Privileges of certificate holder

174.11

Duration of certification

174.13

Renewal of certificate

174.15

Impose a penalty, suspension or revocation

 

174.17

Certification Requirements

SUBPART B:

Personnel Requirements

174.51

Network protection

174.53

Documentation

174.55

Records

174.57

Internal Quality Assurance

174.59

Organization Exposition

174.61

Training

 

 

 

174.63

Master   Re- qualification Requirements

skill requirements

174.65

Message handling services (ATS MHS)

 

174.67

Security for Telecom

 

174.69

CO – ordination

 

174.71

Telecommunication services

 

174.73

Categories of the telecommunication officers

174.75

Operating Requirements

SUBPARTC:

Continued compliance

 

174.101

Identification codes and call signs

174.103

Communication procedures

 

 

174.105

Operating and Maintenance Instructions

174.107

Deviations

174.109

Limitations on certification holder

174.111

Changes to certification holder’s organization

174.113

OPERATIONS  AFS

SUBPARTD:

Division of service

 

174.201

Hours of service

 

174.203

Changing normal hours service

 

174.205

Requesting change in hours service by and aircraft station

 

 

174.207

Supervision

174.209

Infringements

174.211

Serious infringements

 

174.213

Unusual transmission phenomena 

174.215

Superfluous transmissions

 

 

174.217

Interference

 

 

174.219

General

 

 

 

174.221

Extensions of service

 

174.223

Before closing down

174.225

Working regularity in a network

174.227

Stations other than continuous hours of operation

174.229

Acceptance transmission

174.231

The responsibility for determining the acceptability

 

174.233

Messages is deemed acceptable

 

174.235

The authority in control

 

174.237

Acceptable messages

 

174.239

Acceptance as a single message

174.241

Messages handled for aircraft operating agencies

174.243

Messages be delivered to more aircraft operating agencies

174.245

The responsibility for delivery by aeronautical stations

 

174.247

Formation of delivery

 

174.249

Delivery of written messages

174.251

Messages originated in the aeronautical mobile service by an aircraft in flight

174.253

Messages requiring transmission over aeronautical mobile service

174.255

Messages (including air-reports)

 

174.257

Messages (including air-reports)

174.259

Universal Co-ordinated Time (UTC)

174.261

Date-time group

174.263

Record of communications

174.265

Recording the messages

174.267

Harmful interference

 

174.269

Written log

 

174.271

Radio log entries

174.273

Written log correction

 

174.275

Telecommunication logs, written or automatic

 

174.277

Entries

174.279

Establishment of radio communication

 

174.281

Minimum power

 

174.283

Use of abbreviations and codes

174.285

Use of abbreviations and codes other than approved by ICAO

 

174.287

Cancellation of messages

174.289

 

SUBPARTE:

General

 

174.301

Material permitted in AFS messages

 

174.303

Messages using the ITA-2 code

 

 

174.305

Messages using IA-5

174.307

The text of message

 

174.309

Wishing of alignment functions

174.311

Meteorological operational channels and meteorological operational Telecommunication    networks

 

174.313

Categories of messages

174.315

Distress messages

 

174.317

Urgency messages

 

174.319

Flight safety messages

174.321

Meteorological messages

174.323

Flight regularity messages

174.325

Aeronautical information services

174.327

Aeronautical administrative messages

 

174.329

The selection of priority

174.331

Service messages

 

174.333

Service messages preparation

174.335


Priority of service messages

 

174.337

Service message previously transmitted

174.339

 

 

 

Service messages

 

174.341

Reply to a service message

 

174.343

Text of a service message

 

174.345

SS service message

 

 

 

 

174.347

Service message

 

 

174.349

Order of priority

 

174.351

 

Messages having the same priority indicator

174.353

Routing of messages.

 

 

174.355

Predetermined diversion routing

 

 

174.357

Diversion routing

 

174.359

Disposing traffic over the aeronautical fixed service

174.361

Supervision of message traffic

174.363

Missing channel-sequence numbers

 

174.365

Responsibility for transmission of the message

174.367

If the channel sequence less than that expected

174.369

Correcting the channel sequence number

174.371

Misrouted messages

 

 

174.373

Receiving a misrouted message

 

174.375

Misrouted message

 

 

174.377

Interrupted circuit

 

 

 

 

 

 

174.379

Failure of communications

174.381

Alternative circuit

 

174.383

Failing attempts

174.385

Failing of radio circuits due to propagation conditions

174.387

Action be taken in case of radio communication failure

 

174.389

Diverted traffic

 

 

174.391

AFTN traffic records

 

174.393

AFTN destination stations

174.395

Period of retention of traffic at the AFTN radio station

174.397

Period of retention of traffic at the AFTN radio station

174.399

Acknowledgement

174.401

Test messages

 

174.403

Messages using (ITA-2)

174.405

Heading

 

174.407

Contents of the circuit identification

174.409

Three digits channel- sequence numbers

174.411

The use of four digit channel sequence number

174.413

The transmission identification

174.415

Teletypewriter operation

174.417

Optional service information

174.419

Misinterpretation

 

174.421

Address

 

174.423

Priority indicator

174.425

An addressee indicators

174.427

Address has not been allocated an ICAO

174.429

Message addressed to an aircraft in flight

174.431

The complete address

174.433

Messages offered in page copy

174.435

Completion of each line of addressee

174.437

Origin

174.439

The filling time

 

174.441

The origin indicator

174.443

Organization has not been allocated an ICAO

 

174.445

Message originated by an aircraft in flight

174.447

Messages relayed over AFTN

174.449

The priority alarm

 

174.451

The inclusion of optional data 

174.453

The presence of the optional data

 

174.455

Additional addressing information in a message

 

174.457

Separate address for service messages

174.459

The origin line

174.461

Drafted messages

174.463

Beginning of the text

 

174.465

ICAO three letter designator

174.467

ICAO three letter designator YXY, YYY or ZZZ

 

174.469

ICAO three letters designator (s) YXY, YYY or ZZZ

 

174.471

Alignment function

174.473

Teletypewriter operation

 

174 475

Error cases

174.477

Action be taken before the local delivery

174.479

The end of text

 

174.481

The length of text

174.483

The ending

 

174.485

AFTN messages

174.487

Stripped address

174.489

Characters and spaces

174.491

Line of the text of a message

174.493

Channel-check transmissions

174.495

Periodical check

174.497

In case of periodical check not received

174.499

Channel check transmission

174.501

Channel check transmission

174.503

Action be taken in case of multichannel circuits

 

174.505

Automatic error correction

174.507

Periodical responsibility

174.509

Predetermined responsibility list

174.511

In case of containing identical location indicator in the address

 

174.513

AFTN message originator not capable of handling service messages

174.515

Form of transmission

174.517

Message format

 

174.519

The heading line

174.521

Re-processing procedures

174.523

Transmission of address

 

174.525

Acknowledgement of receipt

174.527

The receipt of distress messages

174.529

Repetition of multi-address message

 

174.531

During the re-transmission of a message

 

174.533

Receiving service Message for mutilated message

174.535

Before re-transmission is commenced

174.537

After a message has been transmitted

174.539

If after transmission of the text

 

174.541

Incomplete end of message signal

174.543

Relay stations

174.545

Receiving completely mutilated address line

174.547

The text of this service message

174.549

The priority alarm

 

174.451

The inclusion of optional data 

 

174.453

The presence of the optional data

174.455

Additional addressing information in a message

174.457

Separate address for service messages

174.459

The origin line

 

174.461

Drafted messages

174.463

Beginning of the text

174.465

ICAO three letter designator

174.467

ICAO three letter designator YXY, YYY or ZZZ

 

174.469

ICAO three letters designator (s) YXY, YYY or ZZZ

 

174.471

Alignment function

 

174.473

Teletypewriter operation

174 475

Error cases

 

174.477

Action be taken before the local delivery

174.479

The end of text

 

174.481

The length of text

174.483

The ending

174.485

AFTN messages

174.487

Stripped address

174.489

Characters and spaces

 

174.491

Line of the text of a message

174.493

Channel-check transmissions

174.495

Periodical check

174.497

In case of periodical check not received

 

174.499

Channel check transmission

174.501

Channel check transmission

174.503

Action be taken in case of multichannel circuits

 

174.505

Automatic error correction

174.507

Periodical responsibility

174.509

Predetermined responsibility list

174.511

In case of containing identical location indicator in the address

174.513

AFTN message originator not capable of handling service messages

 

174.515

Form of transmission

 

174.517

Message format

 

174.519

The heading line

174.521

Re-processing procedures

174.523

Transmission of address

174.525

Acknowledgement of receipt

 

174.527

The receipt of distress messages

174.529

Repetition of multi-address message

 

174.531

During the re-transmission of a message

 

174.533

Receiving service Message for mutilated message

174.535

Before re-transmission is commenced

174.537

After a message has been transmitted

174.539

If after transmission of the text

 

174.541

Incomplete end of message signal

 

174.543

Relay stations

174.545

Receiving completely mutilated address line

 

174.547

The text of this service message

 

174.549

Resuming the responsibility

174.551

Length of messages other than 8 letters

174.553

Service requesting correction in errors

174.555

Station receiving a service message

 

174.557

Unknown addressee indicator

174.559

Correct addressee indicator

174.561

The first relay station

174.563

The text of this service message

174.565

Action be taken on a service message

174.567

Receiving incorrect originator indicator

174.569

Text of the service message

 

174.571

The station receiving a service message

174.573

Typing of the ending

 

174.575

Predetermined distribution system

174.577

Predetermined distribution addressee indicator (PDAI)

174.579

AFTN messages carrying predetermined addressee indicator

174.581

States shall send their list of selected predetermined list

174.583

The list of addressee indicator of (PDAI)

 

174.585

Message format

 

174.587

Heading

174.589

On point-to-point circuits

174.591

Channel sequence numbers 

174.593

The expansion of the channel-sequence number

 

174.595

The transmission identification

 

174.597

Additional service information

174.599

Address

174.601

The priority indicator

 

174.603

Order of priority

174.605

Addressee indicator

174.607

Message be addressed to an organization

 

174.609

Message be addressed to an aircraft in flight

174.611

Three address lines

174.613

The completion of the addressee indicator

174.615

Messages offered on page copy

174.617

Origin

174.619

The filing time

174.621

The originator indicator

174.623

Message originated by an organization

 

174.625

Messages relayed over the AFTN

174.627

Message originated by an aircraft in flight and requesting handling over AFTN

 

174.629

The priority alarm

174.631

The inclusion of optional data

174.633

The presence of the optional data

174.635

Exchanging of additional addressing information

174.637

Modifier SVC

174.639

The origin line

174.641

The text

174.643

Originator’s reference

174.645

ICAO three-letter designators

174.647

ICAO three-letter designators

174.649

ICAO three-letter designator(s)

174.651

An alignment function

174.653

Corrections on page copy

174.655

The text of messages

174.657

Ending

174.659

Station terminal equipment (page printers)

 

174.661

Message does not transit ITA-2

174.663

Messages length

174.665

Procedures for messages using IA5 cod

 

174.667

Reserved

174.669 Through 174.677

Transfer of AFTN messages

174.679

Starting of the messages

174.681

The end of the messages

 

174.683

The purposes of technical supervision

174.685

Technical supervision

174.687

The ATS message handling service

174.689

Inter-Centre Communications (ICC)

 

174.691

The highest standard of discipline

 

174.693

ICAO standardized phraseology

174.695

The transmission of messages

174.697

Human performance

174.699

Test signals

174.701

Test signals

174.703

Exception

174.705

Elapsed period

174.707

When an aeronautical station is called simultaneously by several aircraft stations

174.709

Communications between aircraft stations

174.711

The categories of messages handled by the aeronautical mobile service

174.713

Distress message

174.715

Urgency messages

174.717

Flight safety messages

174.719

Meteorological messages

174.721

Flight regularity messages

174.723

Messages having the same priority

 

174.725

Incomplete transmissions

 

174.727

Held pending correction

174.729

Cancellation

174.731

Language

 

174.733

The English language

174.735

Language

174.737

Spelling

174.739

All numbers

174.741

All numbers

174.743

All numbers

174.745

Verification

174.747

Transmission of numbers

174.749

Transmission conduct

174.751

Speech transmitting technique

174.753

Words and phrases

174.755

Messages handled entirely by the aeronautical mobile service

 

174.757

Messages requiring handling by the AFTN

 

174.759

Messages originated in an aircraft

174.761

Specification of the text

174.763 Specification of the text

 

174.763

Message to be addressed to an aircraft in flight

174.765

The aeronautical mobile service transmission

174.767

Call sign of the aeronautical mobile service

174.769

Units of service

174.771

Types of aircraft identification

 

174.773

Abbreviated call signs

 

174.775

Radiotelephony procedures174.777 Radiotelephony procedures

174.777

Precautions for the safety

 

174.779

Intervals of using full radio call sign

174.781

The replay for the calls

174.783

Communications

174.785

Abbreviated radiotelephony call signs communication

174.787

After contact has been established

174.789

In order to avoid confusion

174.791

Exchange of communications

174.793

Abbreviated procedures

174.795

Acknowledgement of receipt.

174.797

contents of acknowledgement

174.799

Acknowledgement of receipt.

174.801

End of conversation

174.803

Correctness of errors

174.805

Correctness of errors

174.807

Correctness of errors

174.809

Correctness of errors

174.811

Correctness of errors

174.813

Correctness of errors

174.815

Correctness of errors

174.817

Communications watch/ Hours of service during flight

174.819

Watching hours service

174.821

Suspension of operation

174.823

Suspension of operation174.825 Suspension of operation

174.825

Operational frequency for an aircraft174.827 Operational frequency for an aircraft

174.827

Operation frequency for the aeronautical radio station

174.829

The consideration for designating radio frequency

174.831

Action be taken if the designated frequency proves unsuitable

174.833

Establishment of communications

174.835

In case of communication from aeronautical station cannot be established 

174.837

Transferred communication

174.839

Transferred communication

174.841

After establishing initial call

174.843

Communications failure (Air-ground)

174.845

Communications failure -Air-ground

174.847

Action be taken in case of an aircraft station unable to establish communication

 

174.849

Action be taken by the pilot in command

174.851

Aircraft unable to establish communication

174.853

Ground-to-air communication

174.855

Action be taken by the aeronautical station 

174.857

Blind transmission

174.859

Blind transmission

174.861

Radio communication failure

174.863

Distribution of air reports

174.865

Forwarding messages to an aircraft in flight

174.867

Unable to dispose the messages

174.869

The aeronautical station forwarding the message

174.871

Distress and urgency messages

174.873

Distress and urgency signals

174.875

Distress and urgency signals

174.877

Distress message174.879 Distress message

174.879

No acknowledgement

174.881

Distress and urgency frequencies

174.883

Rate of speed for  distress and urgency messages

174.885

Action by the aircraft in distress

 

174.887

First station acknowledging the distress

174.889

Imposition of silence

174.891

Station using the distress and urgency signals174.893 Station using the distress and urgency signals

174.893

Distress message

174.895

Station acknowledging the distress

 

174.897

Termination of distress communications

174.899

Station controlled the distress communication

174.901

Silence conditions

174.903

Aircraft reporting the urgency condition

174.905

Action by the station addressed or first station acknowledging the urgency message

174.907

Action by all other stations

174.909

Action by an aircraft used for medical transport

174.911

Announcing and identifying the medical transport

174.913

Action by the station addressed or by other stations receiving medical transport

174.915

Communications related to acts of unlawful interference

174.917

Broadcast material

174.919

Frequencies and schedules

 

 

 

174.921

Schedules and frequencies of all broadcasts

174.923

Scheduled broadcasts

174.925

After definite advice

174.927

Where broadcasts are conducted on a time allotment basis

174.929

In sequential collective type broadcasts

174.931

Interruption of service

174.933

Radiotelephone broadcast

174.935

Rate of speech on radiotelephone broadcasts

174.937

Preamble of the general call

174.939