Humminbird VHF255SW - Manual (Page 38)

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13. USING THE WATCH MONITOR MODES
The Humminbird® VHF255S is equipped with two types of monitor modes: Dual Watch
and Tri Watch.
Dual Watch monitors the current working channel and Channel 16 alternately. Tri Watch
monitors Channel 16, Channel 9 and the current working channel. Both watch modes
also monitor for weather alerts when Weather Alert mode has been enabled.
To activate and terminate Dual Watch mode:
1. Press and release the WATCH key to activate the Dual Watch mode. The DU
icon will appear on the LCD.
2a. Press and release the WATCH key again to terminate Dual Watch mode and
return to the previous working channel. To quit Dual Watch mode, you can also
press the 16/9, DSC/MENU/or the CANCEL/WX keys. Press the PTT key to enter
transmit mode on the current channel.
or...
2b. Press and hold the WATCH key for 3 seconds to terminate Dual Watch mode
and enter into Tri Watch mode. The TRI icon will appear on the LCD.
NOTE: During Dual Watch mode, the SCAN, HI/LO/MEM, BAND/SAVE, and the Up and
Down Channel keys are inactive and will sound an error beep if pressed.
To activate and terminate Tri Watch mode:
1. Press and hold the WATCH key for 3 seconds to activate the Tri Watch mode.
The TRI icon will appear on the LCD.
2a. Press and hold the WATCH key again for 3 seconds to terminate Tri Watch
Mode and to return to the previous working channel. To quit Tri Watch mode,
you can also press the 16/9, DSC/MENU or the CANCEL/WX keys. Press the
PTT key to enter transmit mode on the current channel.
or...
2b. Press and release the WATCH key to terminate Tri Watch mode and enter into
Dual Watch mode. The DU icon will appear on the LCD.
NOTE: During Tri Watch mode, the SCAN, HI/LO/MEM, BAND/SAVE, and the Up or Down
Channel keys are inactive and will sound an error beep if pressed.