ACR Electronics GlobalFix RLB-37 - Manual (Page 25)

Y1-03-0242 Rev. B 24
11. Extended GPS test
The beacon may be tested for GPS functionality, however, this may only be
done once in the five-year lifetime of the battery due to the significant drain
on the battery. This test is not necessary at any time in the life of the beacon,
but is made available in the event that the beacon owner wishes to verify
internal GPS engine viability.
An extended GPS test may be invoked by holding the switch in test position
for 10 seconds after Self-Test completes. A long beep indicates the start of
the extended GPS test and the internal GPS begins to acquire coordinates
data. Once the data is acquired, another long beep and a green LED can be
observed.