Pilot Operating Handbook
Cavalon Pro
SECTION 9-4
ELT
RotorSport_POH_Cavalon Pro
Revision 1.0 – Issue Date 12 04 2015
9-20
at the rear part of the rotor mast fairing. A remote cockpit switch with visual indicator is
provided in the instrument panel. In order to use the remote cockpit switch or to enable
automatic activation, the 3-position toggle switch of the transmitter must be set to ‘ARM’.
If ELT is inadvertently activated, use the ‘RESET/TEST’ position of the rocker switch to stop
transmission and reset the unit. The red visual indicator will extinguish when unit is reset.
The ELT system sends distress signals on 406 MHz and 121.5 MHz. The 406 MHz
transmission carries digital data which enable the identification of the aircraft in distress and
facilitate SAR operation (type of the aircraft, number of passengers, type of emergency).
The 406 MHz message is transmitted to the COSPAS-SARSAT satellites and is
downloaded to one of the 64 ground stations. The aircraft is located by Doppler effect by the
LEO satellites with a precision better than 2 NM (4 km) at any point of the earth.
The 121.5 MHz frequency is no more processed by COSPAS-SARSAT system but is still
used by SAR services for homing in the final stage of rescue operations.
In the event of a crash, the ELT activates automatically by means of a g-switch and
transmits a sweep tone on 121.5 MHz and the 406 MHz signal.
For further information, please refer to the manufacturer’s documentation Note that apart
from the initial registration process, recurrent registration may apply.
Remote cockpit switch
ELT transmitter and cockpit switch
9.4.8
Handling and Servicing
The ELT transmitter contains a battery with a limited lifetime. See placard and
accompanying documentation. For maintenance and testing, please contact your qualified
service partner.
