User's Manual

Page 11
4.4.2 Red LED
The red LED is used to indicate transmissions by the EPIRB. When activated, it
flashes alternately with the strobe to indicate a good transmission on 121.5 MHz.
Every 50 seconds it illuminates for 2 seconds to indicate a good transmission on 406
MHz; immediately before the transmission the LED flashes rapidly as a warning to the
user.
When the EPIRB is first activated the red LED is illuminated continuously until the
EPIRB begins to transmit, when it begins to flash. There is time to de-activate the
EPIRB without causing an alert.
4.5 Buzzer
The EPIRB contains a buzzer to give audible feedback.
When the EPIRB is activated the buzzer pulses rapidly (whilst the red LED is ON
continuously) as a warning that the EPIRB is about to transmit. Once the first
transmission is complete, the buzzer sounds synchronously with the strobe.
The buzzer is also used to indicate the results of self-test.