Page 436 - PPL-engelsk 2025

Communication

4.14.1 Testing the emergency transmitter

Switch on the aircraft radio and set it to 121.5 MHz (only on the frequency that

we can test). Then activate the emergency transmitter manually and you hear

whether it is ok. It is if you hear the siren sounds emitted.

Position determination with 406MHz is done via satellites and is accurate within

approx. 20 km

The system is called COSPAS/SARSAT and is a collaboration between several

countries.

TESTING OF EMERGENCY TRANSMITTERS:

1. Must be performed within the first 5 minutes of each hour.

2. Must last no longer than 1 second or 3 sweeps.

3. Must be performed on the ground

4.14.2 Requirements for listening watch

When flying over the North Sea and Skagerak within Copenhagen FIR and when

flying in Sonderstrom FIR, continuous listening watch must be maintained on

the VHF emergency frequency 121.5 MHz

However, this is excepted during periods when speaking on other frequencies
or work in the cabin does not allow listening on two frequencies at the same

time.

If you hear an ELT signal (piijjooouuuu- piijjooouuuu….. 4 x 2 times), you must,

if you judge that it is not a short test, notify the nearest aeronautical station,

stating:

- Position, altitude and route

- Time of reception of the first signals

- Information about the strength of the signal.

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Flight Theory PPL(A)(UL)/LAPL Henning Andersen, Midtjysk Flyveskole© 2025 436