ITU Radio Regulations and Space Security Standards
RR Chapter IX: Maritime services – ITU Radio Regulations and Space Security Standards

ITU Radio Regulations and Space Security Standards RR55-57: RR Articles 55 to 57: Morse radiotelegraphy, narrow-band direct-printing telegraphy and radiotelephony procedures

What does RR55-57 require?

Morse procedures follow Rec. ITU-R M.1170 (55.1); narrow-band direct-printing stations comply with Articles 51 and 52 and use Rec. M.492-6 procedures except in distress, urgency or safety (56.1, 56.2); radiotelephone stations follow Rec. M.1171-1 except in distress, urgency or safety, public correspondence should be duplex where possible, and call-in-progress signals are used on a non-interference basis (57.1 to 57.3). Article 58 applies the International Telecommunication Regulations to charging and accounting.

Maintained by Gerard BlokdykVerified against the published standard Control text last updated

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