Radio Regulations

Source: the Radio Regulations published by the International Telecommunication Union (ITU).

All IBR Recommendations

As incorporated in RR-2016

This is not the text in force. It is the version of this Recommendation that RR-2016 gave treaty-binding force, kept so that the incorporated set can be read as it stood at each conference.

M

Recommendation ITU-R M.625-4

Mandatory (1986-1990-1992-1995-2012)

Direct-printing telegraph equipment employing automatic identification in the maritime mobile service

View official text at ITU

Version history

Version evolution

The number in each cell (e.g. −9) is the Recommendation's revision number — the “-9” in ITU-R M.585-9, not a negative value. So −8 → −9 means the binding reference moved from the 8th to the 9th revision.

RR-2008 -3
RR-2012 -3
RR-2016 -4
RR-2020 -4
RR-2024 —

Incorporated into the RR by

RR provisions, footnotes and Resolutions that incorporate this Recommendation

Provision

19.83 51.41

Bands and services are derived from the footnotes of the Radio Regulations as they stand, so they are shown only on the edition in force.

Scope

The Recommendation provides in Annex 1 characteristics of direct-printing telegraph equipment employing a 7-unit ARQ method for selective communication, a 7-unit FEC method for broadcast mode and automatic identification. Equipment developed in accordance with this Recommendation provides compatibility with equipment without maritime mobile service identity (MMSI) conforming to Recommendation ITU-R M.476.

Recommends

  1. that for direct-printing telegraph circuits in the maritime mobile service, a 7-unit ARQ method should be employed;
  2. that for the direct-printing telegraph service in the broadcast mode, a 7-unit forward acting error-correcting method, using time diversity, should be employed;
  3. that equipment designed in accordance with §§ 1 and 2 should employ automatic identification and have the characteristics given in Annex 1.

Source: ITU Radio Regulations, editions of 2008, 2012, 2016, 2020 and 2024. The English, French and Spanish texts are each taken from the official edition in that language, not translated from one another. Sources and citation.