Communication problems in the Alpine region
The Alps are one of the most densely flown mountain regions in Europe. Whether sightseeing flights with tourists, transport and rescue missions by helicopter or private motorised flights - the variety of aircraft is huge, as are the dynamics of movement in three-dimensional space. Complex wind and weather conditions prevail, requiring spontaneous course changes.
A helicopter pilot recently described how he had repeatedly experienced near-collisions in the area of the Matterhorn and other well-known mountains. The reason: while helicopters routinely listen to the mountain frequency 130.355 MHz, many motorised aircraft pilots do not tune in. This results in a lack of mutual position reports and increases the risk of aircraft coming dangerously close to each other.
Significance of the mountain frequency
130.355 MHz is the officially defined mountain frequency in Switzerland. It serves as a safety net for all flights in alpine regions. Pilots can send blind messages here - position reports, directional information or information on special manoeuvres without a ground station responding.
The purpose of this frequency is to create transparency: Every pilot in the vicinity should have an overview of where other aircraft are located. This can be particularly important in valleys or narrow mountain ridges. The frequency can also be used in emergencies, for example if an aircraft has an accident on a mountain landing site or a helicopter requires assistance.
Typical application scenarios
- Sightseeing flights around famous peaks: Heavy tourist traffic results in clusters of helicopters and small aircraft. Active utilisation of the frequency is essential here.
- Mountain landing sitesAnyone approaching or starting from such places should report blindly on 130.355 MHz. This ensures that all traffic is informed in good time.
- EmergenciesA crashed aircraft or a damaged helicopter in inaccessible terrain can call for help more quickly by reporting on the mountain frequency.
Training and awareness
One problem is that the use of the mountain frequency is not sufficiently emphasised in the training of many powered aircraft pilots. While mountain pilots or helicopter crews take the frequency for granted, many motorised aircraft pilots rely solely on the nearest information frequency.
Associations and flight schools are therefore required to systematically integrate the correct use of frequencies into training and follow-up training. The Swiss VFR Pilot Guide contains information on mountain frequency, but is apparently not regularly consulted by all pilots.
Practical tips for pilots
- PreparationThe frequency 130.355 MHz should be noted in every flight preparation for mountain flights.
- Parallel monitoringIn addition to the regular info frequency, parallel monitoring of the mountain frequency is recommended. Modern radios make this technically easy.
- Send blind messagesPosition reports for known peaks, valleys or landing sites should be standard, even if there is no reply traffic.
- TrainingFlight schools and clubs should carry out more exercises on mountain flights in which the use of the frequency is practised on a mandatory basis.
Conclusion
Safety in alpine airspace depends not only on flying skills, but also to a large extent on good communication. The mountain frequency 130.355 MHz is a simple but effective tool for minimising risks.
Anyone flying in the mountains - whether by helicopter, motorised aircraft or glider - should always actively use them. Blind alerts cost little, but can save lives in an emergency. With consistent use, the risk of near-collisions can be significantly reduced and flying in the mountains remains what it should be: a fascinating but safe experience.
Source references:
Staysafe.aero