The signal, modulated two to four times per second, is detected by a receiver tuned to the same frequencies. Search and rescue forces are equipped with radio direction finding equipment that determines the direction of the signal so that they can locate the signal's origin and pinpoint the emergency. It employs satellites in search and rescue. Reliability of transmitted signal. Faster response time.
Rescue forces can identify boat, captain, radio, call sign, etc.
Includes 121.5 MHz homing signal to provide SAR forces with the emergency location. This transmission is coded with a unique signal to provide a positive ID of your vessel. The stability and accuracy of the transmitted signal pinpoints your location within a three mile radius. A 121.5 MHz signal which air and sea rescue forces use for homing as they near your location. This signal is also received by satellite.