User's Manual

15
Typical decal
being fitted
completely to get a valid GPS position. If this happens, the GPS PLB “fails safe” and
does not transmit an inaccurate position but instead sends information to indicate that
no position is available. Location of the PLB without GPS position information is
dependent on the orbiting satellite system just like with a non-GPS PLB.
PLBs have a secondary 121.5 MHz homing transmitter. This transmits on the 121.5
MHz internationally recognised aviation guard channel. If an aircraft hears an
activated beacon, it will often make a report to the aviation authority which will pass
this information to the Rescue Coordination Centre. When the rescue services get
close they can "home in" on the 121.5 MHz signal using direction finding techniques.
Registration and Licensing
Each PLB has a unique digital identity; this is the 15 digit hexadecimal number printed
on the programming information label located on the back of the PLB (visible only
when the battery pack is removed). It is also pre-printed on the registration form
included with each new PLB and a copy of the programming information label is
usually placed on the first page of this product user manual.
The PLB must be registered with a relevant national authority. A part completed
registration form is normally packed in with the PLB, where required this should be
completed and sent to the relevant national administration at the address detailed on
the registration form. If your form does not have a registration address, contact your
supplier for further advice.
Annex 1. Contains further important information regarding registration of the PLB.
Registration decal
It is usual to receive confirmation after you have correctly registered the PLB. Some
administrations (USA, UK) will send you a registration decal (sticker) which must be
attached to the PLB, as shown below.
Registration decal