ARTICLE 19

Identification of Stations

 

Section I. General Provisions

 

19.1     1    All transmissions shall be capable of being identified either by identification signals or by other means.   

19.2    2    1) All transmissions with false or misleading identification are prohibited.     

19.3            2) Where practicable and in appropriate services, identification signals should be automatically transmitted in accordance with relevant ITU-R Recommendations.  

19.4            3) All transmissions in the following services should, except as provided in Nos. 19.13 to 19.15, carry identification signals:

19.5            a) amateur service;

19.6            b) broadcasting service;

19.7            c) fixed service in the bands below 28 000 kHz;

19.8            d) mobile service;

19.9            e) standard frequency and time signal service.

19.10          4) All operational transmissions by radiobeacons shall carry identification signals. However, it is recognized that, for radiobeacons and for certain other radionavigation services that normally carry identification signals, during periods of malfunction or other non-operational service the deliberate removal of identification signals is an agreed means of warning users that the transmissions cannot safely be used for navigational purposes.

19.11          5) All transmissions by satellite emergency position-indicating radiobeacons (EPIRBs) operating in the band 406-406.1 MHz or the band 1 645.5-1 646.5 MHz, or by EPIRBs using digital selective calling techniques, shall carry identification signals.

19.12            6) When identification signals are transmitted they shall comply with the provisions of this Article.   

19.13             7) However, the requirements for certain transmissions to carry identification signals need not apply to:    

19.14             a) survival craft stations when transmitting distress signals automatically;

19.15             b) emergency position-indicating radiobeacons (except for those in No. 19.11).    

19.16    3    In transmissions carrying identification signals a station shall be identified by a call sign, by a maritime mobile service identity or by other recognized means of identification which may be one or more of the following: name of station, location of station, operating agency, official registration mark, flight identification number, selective call number or signal, selective call identification number or signal, characteristic signal, characteristic of emission or other clearly distinguishing features readily recognized internationally.

19.17    4    For transmissions carrying identification signals, in order that stations may be readily identified, each station shall transmit its identification as frequently as practicable during the course of transmissions, including those made for tests, adjustments or experiments. During such transmissions, however, identification signals shall be transmitted at least hourly, preferably within the period from five minutes before to five minutes after the hour (UTC) unless to do so would cause unreasonable interruption of traffic, in which case identification shall be given at the beginning and end of transmissions.

19.18    5    Identification signals shall wherever practicable be in one of the following forms:

19.19    a) speech, using simple amplitude or frequency modulation;

19.20    b) international Morse code transmitted at manual speed;

19.21    c) a telegraph code compatible with conventional printing equipment;  

19.22    d) any other form recommended by the Radiocommunication Sector.  

19.23 6 To the extent possible the identification signal should be transmitted in accordance with relevant ITU-R Recommendations.

19.24 7 Administrations should ensure that wherever practicable superimposed identification methods be employed in accordance with ITU-R Recommendations.

19.25 8 When a number of stations work simultaneously in a common circuit, either as relay stations, or in parallel on different frequencies, each station shall, as far as practicable, transmit its own identification or those of all the stations concerned.

19.26 9 Administrations shall ensure, except in the cases mentioned in Nos. 19.13 to 19.15, that all transmissions not carrying identification signals can be identified by other means when they are capable of causing harmful interference to the services of another administration operating in accordance with these Regulations.

19.27 10 Administrations shall, having regard to the provisions of these Regulations relating to the notification of assignments for recording in the Master Register, adopt their own measures to ensure compliance with the provisions of No. 19.26.

19.28 11 Each Member State reserves the right to establish its own measures for identifying its stations used for national defence. However, it shall use, as far as possible, call signs recognizable as such, and containing the distinctive characters of its nationality.

 

Section II – Allocation of international series and assignment of call signs

19.28A 11A 1) For the purpose of the supply of identification signals, a territory or geographical area shall be understood to mean the territory within the limits of which the station is located. For mobile stations, it shall be understood to mean the territory within the limits of which the responsible administration is located. A territory which does not have full responsibility for its international relations shall also be considered as a geographical area for this purpose.

19.28B 2) In all documents of the Union where the terms allocation of call sign series and assignment of call signs are to be used, they shall be used with the following meaning:

 

Identification means

Terms used in these Regulations

International series of call signs (including maritime identification digits (MIDs) and selective call numbers)

Allocation to the administration of a Member State  (see definition in No. 1002 of the Constitution)

Call signs (including maritime identification digits (MIDs) and selective call numbers)

Assignment by any administration to stations operating in a territory or geographical area (see No. 19.28A)

 

19.29 12 1) All stations open to international public correspondence, all amateur stations, and other stations which are capable of causing harmful interference beyond the boundaries of the territory or geographical area in which they are located, shall have call signs from the international series allocated to its administration as given in the Table of Allocation of International Call Sign Series in Appendix 42.

19.30 2) As the need arises, ship stations and ship earth stations to which the provisions of Chapter IX apply, and coast stations or coast earth stations capable of communicating with such ship stations, shall have assigned to them maritime mobile service identities in accordance with Section VI of this Article.

19.31 3) It is not compulsory to assign call signs from the international series to stations identified by maritime mobile service identities or which are easily identified by other means (see No. 19.16) and whose signals of identification or characteristics of emission are published in international documents.

19.31A 4)Means shall be provided for uniquely identifying mobile stations operating in automated terrestrial or satellite communication systems for the purposes of answering distress calls, for avoiding interference and for billing. Identification of the mobile station by accessing a registration database is satisfactory, provided that the system can associate the mobile station calling number with the particular mobile station user. (WRC-03)

19.32 13 Should the available call sign series in Appendix 42 be exhausted, new call sign series may be allocated according to the principles set out in Resolution 13 (Rev.WRC-97) relating to the formation of call signs and the allocation of new international series.

19.33 14 Between radiocommunication conferences, the Secretary-General is authorized to deal with questions relating to changes in the allocation of series of call signs, on a provisional basis, and subject to confirmation by the following conference (see also No. 19.32).

19.34 15 The Secretary-General shall be responsible for allocating maritime identification digits (MIDs) to administrations and shall regularly publish information regarding allocated MIDs.

19.35 16 The Secretary-General shall be responsible for allocating additional maritime identification digits (MIDs) to administrations within the limits specified, provided that it is ascertained that the possibilities offered by the MIDs allocated to an administration will soon be exhausted despite judicious ship station identity assignment as outlined in Section VI. (WRC-03)

19.36 17 Each administration has been allocated one or more maritime identification digit (MID) for its use. A second or subsequent MID should not be requested2 unless the previously allocated MID is more than 80% exhausted in the basic category of three trailing zeros and the rate of assignments is such that 90% exhaustion is foreseen. (WRC-03)

19.36.1 In no circumstances may an administration claim more MIDs than the total number of its ship stations notified to ITU divided by 1 000, plus one. Administrations shall make every attempt to reuse the Maritime Mobile Service Identities (MMSI) assigned from earlier MID resources, which become redundant after ships leave their national ship registry. Such numbers should be considered for reassignment after being absent from at least two successive editions of List VIIA of the ITU service publications. Administrations seeking additional MID resources must meet the criteria of having notified all previous assignments, in accordance with No. 20.16. This criteria applies only to MMSIs in the basic category and to all MIDs assigned to the administration.

19.37 18 The Secretary-General shall be responsible for supplying series of selective call numbers or signals (see Nos. 19.92 to 19.95) at the request of the administrations concerned.

19.38 19 1) Each administration shall choose the call signs and, if the selective calling system used is in accordance with Recommendation ITU-R M.257-3, the ship station selective call numbers and the coast station identification numbers of its stations from the international series allocated or supplied to it; and shall notify this information to the Secretary-General together with the information which is to appear in Lists I, IV, V, VI and VIIIA. These notifications do not include call signs assigned to amateur and experimental stations.

19.39 2) Each administration shall choose the maritime mobile service identities of its stations from the maritime identification digits allocated to it and notify this information to the Secretary-General for inclusion in the relevant lists, as provided for in Article 20.

19.40 3) The Secretary-General shall ensure that the same call sign, the same maritime mobile service identity, the same selective call number or the same identification number is not assigned more than once and that call signs which might be confused with distress signals, or with other signals of the same nature, are not assigned.

19.41 20 1) When a fixed station uses more than one frequency in the international service, each frequency may be identified by a separate call sign used solely for this frequency.

19.42 2) When a broadcasting station uses more than one frequency in the international service, each frequency may be identified by a separate call sign used solely for this frequency or by some other appropriate means, such as announcing the name of the place and frequency used.

19.43 3) When a land station uses more than one frequency, each frequency may, if desired, be identified by a separate call sign.

19.44 4) Where practicable, coast stations should use a common call sign for each frequency series3.

Section III – Formation of call signs

19.45    21    1) The twenty-six letters of the alphabet, as well as digits in the cases specified below, may be used to form call signs. Accented letters are excluded.

19.46                 2) However, the following combinations shall not be used as call signs:

19.47               a) combinations which might be confused with distress signals or with other signals of a similar nature;

19.48               b) combinations in Recommendation ITU-R M.1172 that are reserved for the abbreviations to be used in the radiocommunication services.

19.49               SUP

19.50    22 Call signs in the international series are formed as indicated in Nos. 19.51 to 19.71. The first two characters shall be two letters or a letter followed by a digit or a digit followed by a letter. The first two characters or in certain cases the first character of a call sign constitute the nationality identification.

19.50.1 For call sign series beginning with B, F, G, I, K, M, N, R, W and 2, only the first character is required for nationality identification. In the cases of half series (i.e. when the first two characters are allocated to more than one Member State), the first three characters are required for nationality identification. (WRC-03)

19.51   Land and fixed stations

19.52    23         1)

– two characters and one letter, or

– two characters and one letter followed by not more than three digits (other than the digits 0 and 1 in cases where they immediately follow a letter).

19.53         2) However, it is recommended that, as far as possible, the call signs of fixed stations consist of:

– two characters and one letter followed by two digits (other than the digits 0 and 1 in cases where they immediately follow a letter).

19.54   Ship stations

19.55    24      1)

                    – two characters and two letters, or

                    – two characters, two letters and one digit (other than the digits 0 or 1).

19.56         2) However, ship stations employing only radiotelephony may also use a call sign consisting of:

– two characters (provided that the second is a letter) followed by four digits (other than the digits 0 or 1 in cases where they immediately follow a letter), or

– two characters and one letter followed by four digits (other than the digits 0 or 1 in cases where they immediately follow a letter).

19.57   Aircraft stations

19.58    25

– two characters and three letters.

19.59   Ship’s survival craft stations

19.60    26

– the call sign of the parent ship followed by two digits (other than the digits 0 or 1 in cases where they immediately follow a letter).

19.61   Emergency position-indicating radiobeacon stations

19.62    27

– the Morse letter B and/or the call sign of the parent ship to which the radiobeacon belongs.

19.63   Aircraft survival craft stations

19.64    28

– the complete call sign of the parent aircraft (see No. 19.58), followed by a single digit other than 0 or 1.

19.65   Land mobile stations

19.66    29

– two characters (provided that the second is a letter) followed by four digits (other than the digits 0 or 1 in cases where they immediately follow a letter), or

– two characters and one or two letters followed by four digits (other than the digits 0 or 1 in cases where they immediately follow a letter).

19.67   Amateur and experimental stations

19.68    30   1)

– one character (provided that it is the letter B, F, G, I, K, M, N, R or W) and a single digit (other than 0 or 1), followed by a group of not more than four characters, the last of which shall be a letter, or

– two characters and a single digit (other than 0 or 1), followed by a group of not more than four characters, the last of which shall be a letter. (WRC-03)

19.68A 1A)    On special occasions, for temporary use, administrations may authorize use of call signs with more than the four characters referred to in No. 19.68. (WRC-03

19.69              2) However, the prohibition of the use of the digits 0 and 1 does not apply to amateur stations.

19.70   Stations in the space service

19.71   31 When call signs for stations in the space service are employed, it is recommended that they consist of:

– two characters followed by two or three digits (other than the digits 0 and 1 in cases where they immediately follow a letter).

Section IV - Identification of stations using radiotelephony

19.82A  35A Amateur stations and experimental stations
                                                – a call sign (see No. 19.68)


Last update: 20 juin, 2012

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