Which statement about the COSPAS-SARSAT system is NOT true?

The statement that the position of the EPIRB (Emergency Position Indicating Radio Beacon) is always transmitted in the outgoing transmission is not true. EPIRBs do indeed transmit a distress signal, but they typically do not include their precise GPS position in every transmission. The initial distress signal sent by an EPIRB may just include the beacon's unique identifier without the position, depending on the model and situation.

In contrast, subsequent transmissions from the EPIRB might include position information if the EPIRB is equipped with a GPS module and is functioning correctly. In this case, the EPIRB utilizes GPS data to enhance the accuracy of its location reporting, but this is not guaranteed in every outgoing signal, which ensures that the statement in question is the incorrect one.

The other statements describe true elements of how the COSPAS-SARSAT system operates, emphasizing its role in search and rescue operations through satellite technology and the method of relaying signals to ground stations. Doppler shift is indeed utilized in targeting the position of the transmission source, enabling rescue teams to trace the location effectively, and EPIRBs serve as crucial devices that provide alerts and assist in homing during emergencies.