Activation With Gps; Gps Receiver Orientation - ACR Electronics Cobham ResQLink PLB-375 Product Support Manual

4. Activating Your Beacon

Activation with GPS

When your unit is activated, the GPS receiver will turn on, search to find your LAT/LON and
incorporate it into your 406 MHz signal. As soon as the GPS receiver acquires valid positioning
data, the red flashing light will be replaced by a green flashing light once every 3 seconds.
The same GPS data will be sent with each 406 MHz signal for the next 30 minutes. At that
time the internal GPS will start up again, search to find your LAT/LON and incorporate it into
your next 406 MHz signal. If for any reason the internal GPS cannot update your LAT/LON,
your last position will be used for the next four hours. At that time the green LED will stop
blinking and the red LED will flash once every 3 seconds until new GPS data is obtained.

GPS receiver orientation

When activated, it is critical that you do not cover the beacon with any body part, water,
clothing, etc. The GPS receiver is located under the bottom portion of the case where it is
outline with the text "GPS, Give Clear View To Sky."
To ensure optimum performance of the GPS receiver, the beacon needs to have an
unobstructed view of the sky. Avoid submerging the GPS receiver in water if possible. Water
will shield and inhibit the GPS receiver and may cause difficulties obtaining your GPS
coordinates. Avoid leaning over the beacon to view blinking LED as you may shield the GPS
reception.
Red Flashing Light =
Sending 406 MHz
Signal Only
Green Flashing Light =
Sending 406 MHz
Signal with GPS
Coordinates
9