Radio Regulations

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

Radio Regulations — Articles / Article 34
ART

34

Alerting signals in the global maritime distress and safety system (GMDSS)

RR-2024 · in force CHAPTER VII — Distress and safety communications

Section I − Satellite emergency position-indicating radiobeacon signals (WRC-23)

34.1

§ 1 The emergency position-indicating radiobeacon signal in the frequency band 406-406.1 MHz shall be in accordance with Recommendation ITU-R M.633-5. (WRC-23)

Section II − Digital selective calling

34.2

§ 2 The characteristics of the “distress call” (see No. 32.9) in the digital selective calling system should be in accordance with the most recent version of Recommendation ITU-R M.493. (WRC-12)

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.