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3.3 Operation Check (LED)
The network sounder is powered on/off from ship’s switchboard. The LED on the net-
work sounder lights or flashes according to equipment state, as described in the table
below.
* The LED lights for approximately 20 seconds after turning on the power while the
equipment is being initialized
.
DFF1, top view
LED state Meaning
Lighting continuously* NavNet is not showing the sounder display, or
sounder is not connected to NavNet
Flashing every two seconds Normal operation
Flashing every four seconds Factory test mode
LED