The Artex C406-2 transmits on all 3 emergency frequencies (121.5/243.0 and 406 MHz.) The ELT automatically activates during a crash and transmits the standard swept tone on 121.5 and 243.0 MHz. It also transmits a 406 MHz encoded digital message to the Cospas/Sarsat satellite system, which allows for rapid identification and reduces Search and Rescue response time.
The Artex C406-N is a single output emergency locator transmitter (ELT) that contains the latitude/longitude information from the aircraft navigation system. Following long message protocol, the 406 MHz transmitter turns on and transmits an encoded digital message to the Cospas/Sarsat satellite system every 50 seconds for 520 milliseconds. During a crash, the ELT automatically activates and transmits the standard swept tone on 121.5 and 243.0 MHz.