ACR Electronics RLB-41 Product Support Manual - Page 9
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LED indication of activation and GPS fix
When the beacon is activated and a good GPS fix is acquired, the data is included in the digital message of the next 406
MHz transmission. The RED flashing LED changes to a GREEN flashing LED when GPS coordinates have been successfully
downloaded and are sent.
After the initial beep upon beacon activation, the beacon will continue to beep every 50 seconds to indicate each 406 MHz
transmission. If 4 hours pass without the internal GPS receiver being able to update the last set of navigational
coordinates, the message transmitted by the beacon will revert back to default data. At this point, the green LED will stop
blinking and the red LED will flash. The internal GPS will continue to seek coordinates and, when successful, the green
LED will flash. This new data will be transmitted in the next message burst and the green LED will continue to flash.
False Alarms
To prevent false alarms, it is important to be aware of how your beacon can be activated. Whether you have a Category I
or Category II, these methods are the same:
1. When the beacon is out of its bracket and wet, the unit will start transmitting.
2. When the activation button is pushed, in or out of the bracket, the unit will start transmitting.
After the beacon is inadvertently activated for longer than 50 seconds, a live burst is transmitted. A self-test performed
subsequent to the live burst transmission will fail due to the battery witness being violated (see section on "Maintaining
the Beacon" for the audio-visual feedback provided by the beacon). A commercial vessel, which is inspected by maritime
authorities on an annual basis, must have the beacon battery replaced if the battery witness has been violated.
To prevent false alarms, take these actions:
Do not store the beacon outside its bracket if it can get wet.
Do not clean the beacon with any liquid while out of its bracket.
Reporting
Should there be, for any reason, an inadvertent activation or false alarm, you must report the event to the nearest search
and rescue authorities. Information that should be reported includes:
The 15-digit Unique Identifier Number (UIN) on the label on the side of the beacon.
Time and date of activation
Duration and cause of activation
Location of beacon at the time of activation
To report false alarms in the United States, contact the US Coast Guard at 1-855-406-USCG (8724).
To report false alarms outside the USA, contact the national authority where your beacon is registered.
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