Standard Horizon HX851 Owner's Manual page 22

[ SCAN ( DW )] Key
Press this key to start scanning of programmed channels.
Secondary use:
Press and hold this key to watch for a transmission on CH16, another
selected channel, and CH70 until either signal is received (Triple Watch).
[ CALL ( ENT ) MENU ] KEY
Press this key to access the DSC Call Menu. The "Individual Call",
"Group Call", "All Ships Call", "Position Request", "Position Report",
"DSC Log", and "DSC Test" functions can be accessed from the DSC
Call Menu.
Secondary use:
Press and hold this key to access the "Radio Setup", "DSC Setup" or
"GPS Setup" menu.
[ 16/9 ] Key
Pressing this key immediately recalls channel 16 from any channel
location. Holding down this key recalls channel 9. Pressing this key
again reverts to the previous selected working channel.
[ CLR ( WX )] Key
Press this key to cancel a menu selection and/or keypad entry.
Secondary use:
Immediately recalls the last-used NOAA Weather Channel from any
channel location. Recalls the previously- selected working channel when
the [ CLR ( WX )] key is pressed again.
Advanced use:
When the [ 16/9 ] key is held and the [ CLR ( WX )] key is pressed, the
radio will change the marine band between the USA, International,
and Canadian channels.
[ PRESET ] Key
Press this key to recall the "Preset" channel.
Secondary use:
Press and hold this key to memorize the current channel to the "Preset"
memory channel. When pressed a "
LCD display indicating the channel has been saved to preset memory.
To delete the channel from preset memory, select the channel and press
and hold this key until "
[ POWER ( )] KEY
Press and hold this key for two seconds to turn the radio on or off.
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" icon will be shown on the
" is removed from the display.
HX851