Director of Radiocommunication
Bureau (BR)
Geneva, 1st April 2025
Our Ref.: 01RB(DIR)O-2025-001026
Contact: Mario Maniewicz, Director, BR Mr Erko Kulu
Telephone: +41 22 730 5800 Head of Frequency Management
Telefax: +41 22 730 5785 Division
E-mail:
[email protected] Consumer Protection and Technical
Regulatory Authority
Endla 10A
10122 TALLINN
Estonia
Emails:
[email protected]
[email protected]
Subject: Submission by the Administrations of Estonia, Latvia and Lithuania regarding harmful
interference to receivers in the radionavigation-satellite service
Y/Ref. Your letter reference No. 17-5/2025/0199 dated 19 February 2025
Dear Sir,
I thank you for your above-mentioned letters and wish to inform you that the Radio Regulations Board (RRB),
at its 98th meeting (17 – 21 March 2025), considered your submission as contained in Document RRB25-1/12
as well as Addendum 3 to Document RRB25-1/8(Rev.1) regarding harmful interference to receivers in the
radionavigation-satellite service.
The Board took the following decisions and instructed the Executive Secretary of the RRB to inform you as
follows:
“The Board considered in detail Document RRB25-1/12 from the Administrations of Estonia, Latvia and
Lithuania, and Document RRB25-1/17 from co-signed administrations regarding harmful interference to
receivers in the radionavigation-satellite service (RNSS). The Board concluded as follows:
• The Board continued to note with grave concern the increasing number of cases of harmful
interference affecting safety services, civil aviation and maritime services.
• The Board stressed the need to comply with RR No. 4.10 whenever harmful interference degraded
systems of safety services in the RNSS.
• As measurements had geolocated the source of the harmful interference within the territory of the
Russian Federation, the Board urged the Administration of the Russian Federation to take timely actions and
provide timely responses whenever receiving a communication that one of their stations was causing harmful
interference to a safety service, in compliance with RR No. 15.37.
International Telecommunication Union • Place des Nations • CH-1211 Geneva 20 • Switzerland
Tel: +41 22 730 5111 • Fax: +41 22 733 7256 • E-mail:
[email protected] • www.itu.int •
2
• Noting that harmful interference signals with the characteristics of unnecessary transmissions, or the
transmission of superfluous signals (commonly referred to as jamming) or the transmission of false or
misleading signals (commonly referred to as spoofing) continued to be reported, the Board reiterated its
grave concern that such transmissions were in direct contravention of RR No. 15.1.
The Board instructed the Bureau to:
• urge the Administration of the Russian Federation to take all necessary actions to immediately cease
harmful interference that adversely impacted on safety services and report to the 99th Board meeting;
• continue reporting on progress on the matter to future Board meetings.
The Board strongly urged all administrations concerned to:
• comply with all the relevant provisions of Articles 45 and 47 of the ITU Constitution, RR Nos. 4.10,
15.1, 15.28 and 15.37 and the resolves of Resolution 676 (WRC-23), in particular when harmful interference
adversely affected safety services.
• to cooperate in goodwill to solve the cases of harmful interference affecting safety services as
promptly as possible.”
The summary of decisions approved at the conclusion of the meeting (Document RRB25-1/27) is now
available on the Board’s pages of the ITU-R website.
Yours faithfully,
Mario Maniewicz
Copy: Communications Regulatory Authority – Lithuania -
[email protected]
Electronic Communications Office – Latvia -
[email protected]
Teema: FW: RRB98 Decisions - A.I 6.4
From: Gozal, Karine <
[email protected] <mailto:
[email protected]> >
Sent: Tuesday, April 1, 2025 5:49 PM
To: TTJA Info <
[email protected] <mailto:
[email protected]> >; Erko Kulu <
[email protected] <mailto:
[email protected]> >
Cc:
[email protected] <mailto:
[email protected]> ;
[email protected] <mailto:
[email protected]>
Subject: RRB98 Decisions - A.I 6.4
Dear Sir,
Following the RRB98th meeting, please find attached one communication from the Director, Radiocommunication Bureau.
Best Regards,
Karine GOZAL
RRB Administrative Assistant
International Telecommunication Union
Tel : +41 22 730 5030 | Fax : +41 22 730 5785
www.itu.int <http://www.itu.int/>
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