Enable/Disable Switch (Silent Mode) - Navico Class B Transceiver NAIS-300 Manual

6 flashes - noise threshold exceeded
7 flashes - voltage supply fault
The "BIIT" message will remain there until the fault is
cleared by the NAIS-00 circuitry, or the unit has been
repaired.
TX
After the initial five seconds the LED will then go out. It
will light for one second every time the unit transmits its
AIS data.
The LED will also light continuously if a transmitter time-out
fault occurs.
RX
After the initial five seconds the LED will flash every time
an AIS message is received.
4.3 Enable/disable switch ( )
Silent Mode
This switch allows you to turn the NAIS-00's VHF
transmitter "on" or "off", rendering you either visible or
invisible to other AIS equipped vessels in your VHF range.
The default mode is with the transmitter active, "on".
To turn your transmitter off push the switch once.
The "PWR" LED on the top of the unit will start to flash at
a rate of one second on and one second off. The "TX" LED
will remain off.
To turn your transmitter back on simply push the switch
again.
This mode will be stored in the NAIS memory, therefore
whatever mode you are in when power is turned off, will
be the same when power is restored.
18 Operation