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Annex - 9-10
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APPENDIX 43
Maritime Mobile Service Identities
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1. General
1.1 Maritime mobile service identities are formed of a series of nine digits which are transmitted over the radio path in order to uniquely identify ship stations, ship earth stations, coast stations, coast earth stations and group calls.
1.2 Ship station identities shall be in accordance with relevant CCIR and CCITT Recommendations.
1.3 These identities are formed in such a way that the identity or part thereof can be used by telephone and telex subscribers connected to the general telecommunications network principally to call ships automatically in the shore-to-ship direction.
1.4 There are four kinds of maritime mobile service identities:
i) ship station identities,
ii) group ship station call identities,
iii) coast station identities,
iv) group coast station call identities.
1.5 In this Appendix, the word "country" is used with the meaning attributed to it in No. 2246 of the Radio Regulations.
2. Maritime Identification Digits (MID)
2.1. Table 1 gives the Maritime Identification Digits (MID) allocated to each country. In accordance with No.2087, the Secretary-General is responsible for allocating Maritime Identification Digits to countries not included in this table. No. 2087 A authorizes the Secretary-General to allocate additional MIDs to countries in accordance with this appendix within the limits specified, 1 provided that he is satisfied that the possibilities offered by the MIDs allocated to an administration will soon be exhausted despite judicious ship station identity assignment as outlined in 3.1 below and in conformity with the guidelines contained in the relevant CCIR and CCITT Recommendations.
2.2. A single MID has been allocated to each country. A second MID should not be requested unless the MID first allocated 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. The same criteria should be applied to subsequent requests for MIDs.
2.3. These guidelines do not require an administration to assign numerical identities until it determines that such identities are necessary. They do not concern the assignment of ship station identities without trailing zeros, since it is assumed that there is enough capacity inherent in the system to provide for the assignment of such identities to all ship stations which an administration may wish to identify in this manner.
1) In no circumstances may a country claim more MIDs than the total number of its ship stations shown in the ITU List of Ship Stations (List V) divided by 1000.
3. Ship Station Identities
3.1. Administrations should :
3.1.1. follow the guidelines contained in the relevant CCIR and CCITT Recommendations for the assignment of ship station identities;
3.1.2. make optimum use of the possibilities of forming identities from the single MID allocated to them ;
3.1.3 take particular care in assigning ship station identities with six significant digits (three-trailing-zero identities), which should be assigned only to ship stations which can reasonably be expected to require such an identity for automatic access on a world-wide basis for public switched networks ;
3.1.4 assign one-trailing-zero or two-trailing-zero identities to vessels when they require automatic access only on a national or regional level, as defined in the relevant CCITT Recommendations;
3.1.5 assign ship station identities without trailing zeros to all other vessels requiring a numerical identification.
3.2 The 9-digit code constituting a ship station identity is formed as follows : |
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M1I2D3X4X5X6X7X8X9
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| Where in M1I2D3 |
represent the Maritime Identification Digits and X is any figure from 0 to 9,
4. Group Ship Station
Call Identities Group ship station call identities for calling simultaneously more than one ship are formed as follows: |
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01M2I3D4X5X6X7X8X9
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where the first figure is zero and X is any figure from 0 to 9
The particular MID represents only the country assigning the group ship station call identity and so does not prevent group calls to fleets containing more than one ship nationality.
5. Coast Station Identities
Coast station identities are formed as follows : |
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0102M3I4D5X6X7X8X9
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where the first two figures are zeros and X is any figure from 0 to 9.
The MID reflects the country in which the coast station or coast earth station is located.
6. Group Coast Station Call Identities
Group coast station call identities for calling simultaneously more than one coast station are formed as a subset of coast station identities, as follows: |
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0102M3I4D5X6X7X8X9
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where the first two figures are zeros and X is any figure from 0 to 9.
The particular MID represents only the country assigning the group coast station call identity. The identity may be assigned to stations of one administration which are located in only one geographical region as indicated in the relevant CCIlT Recommendation. |
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