Switzerland and the Principality of Liechtenstein
Radio Interface Regulation

784.101.21 / RIR01011)
Aeronautical communications

RIR0101-02
Aeronautical communications
117.975 - 137.000 MHz
VHF Voice COM 8.33 / 25 kHz.
Edition 6.1 / 01.01.2021

Nr Parameter2)DescriptionComments
1Radiocommunication serviceAeronautical mobile-
2ApplicationAeronautical communicationsVHF Voice COM 8.33 / 25 kHz
3Frequency band117.975 - 137.000 MHzThe Frequency 121.5 MHz shall be used only for emergency communication.
123.1 MHz SAR only.
4Channelling8.33 kHz / 25 kHz-
5Modulation / Occupied bandwidth6k00A3E-
6Direction / Separation--
7Transmit power / Power densityMax. 250 W-
8Channel access and occupation rules--
9Authorisation regimeSwitzerland:
Ground Based equipment: License required.
Aircraft equipment: Notification required.
Liechtenstein: Individual assignment required.		Aircraft radio equipment is listed in the 'Aircraft station license'.
Ground Based Equipment for Recreational Aviation (e.g. Balloon, Glider) does not require a License but Notification.
A License / individual assignment ist not requested for the emergency frequency 121.500 MHz
10Additional essential requirements--
11Frequency planning assumptionsEN 300 676-1, ICAO Annex 10, Volume V, ICAO EUR Doc 011.-
12Planned changes--
13ReferenceEN 300 676-2 /-/-.Effective use of spectrum / ECC Decisions / ECC Recommendations.
14Notification number2019/9501/CH
G/TBT/N/CHE/233		-
15RemarksEN 301 489-22, ICAO Annex 10, Volume III, Volume V, ICAO EUR Doc 011. EU Regulierung 1079/2012 vom 16. Nov. 2012.-

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