Switzerland and the Principality of Liechtenstein
Radio Interface Regulation

784.101.21 / RIR06011)

406 / 121.5 / 243 MHz
Edition 4.1 / 01.01.2021

Nr Parameter2)DescriptionComments
1Radiocommunication serviceMobile-satellite (Earth-to-space)-
2ApplicationEPIRBsGlobal Maritime Distress and Safety System (GMDSS) / COSPAS-SARSAT / Maritime Emergency Position Indicating Radio Beacons (EPIRBs) / For distress and safety only.
Only 406 MHz EPIRBs will be detected by the COSPAS-SARSATsatellite system.
Other devices (such as man overboard systems and VHF homing transmitters) that operate on 121.5 / 243 MHz do not rely on satellite detection.
3Frequency bandA: 406.00 - 406.10 MHz.
B: 121.45 - 121.55 MHz.
C: 242.95 - 243.05 MHz.
Band A: 406 MHz alert frequency for COSPAS-SARSAT satellite service.
Band B: 121.5 MHz homing frequency.
Band C: 243.0 MHz homing frequency.
5Modulation / Occupied bandwidth--
6Direction / Separation--
7Transmit power / Power densityMax. 5 W e.i.r.p. (406 MHz)
Max. 100 mW e.r.p.e.p. (121.5 / 243.0 MHz)
Min. 1.58 W e.i.r.p. for COSPAS-SARSAT EPIRBs (406 MHz).
Min. 25 mW e.r.p.e.p. (Effective Radiated Peak Envelope Power) for the VHF homing transmitter (121.5 / 243.0 MHz).
8Channel access and occupation rules--
9Authorisation regimeSwitzerland: Notification required.
Liechtenstein: Individual assignment required.
Radio equipment is listed in the 'Ship station license'.
Radio equipment shall not be operated on Swiss territory and the Principality of Liechtenstein.
406 MHz EPIRBs have to be programmed with MMSI (Maritime Mobile Station Identity).
406 MHz EPIRBs have to be registered at the Swiss Federal Department for Foreign Affairs (FDFA). FDFA registration form: https://www.eda.admin.ch/smno/de/home/hochseejachten-und-kleinboote.html.
10Additional essential requirements--
11Frequency planning assumptions--
12Planned changes--
13ReferenceEN 300 066, EN 300 152 /-/-.Effective use of spectrum / ECC Decisions / ECC Recommendations.
14Notification number2009/9501/CH
15RemarksPLB programmed with MMSI may be used on pleasure boats as EPIRB.
EN 60945, SOLAS, ITU-R, IMO.
On condition that the PLB is programmed with MMSI (Maritime Mobile Station Identity), it may be operated as EPIRB (Emergency Position Indicating Radio Beacon) on pleasure boats, navigating under Swiss flag or the flag of the Principality of Liechtenstein.
(For PLB refer to [RIR0504-02])

Normative part: 1 to 11
Informative part: Nr 12 to 15

1) RIR for similar and/or other applications are available under: https://www.bakom.admin.ch/bakom/en/home/frequenzen-antennen/nationaler-frequenzzuweisungsplan/schnittstellen-anforderungen.html
2) For explanations and legal status, please refer to basis document 784.101.21 / RIR0000