Garmin VHF 720 Owner's Manual & Reference page 13

The VHF 720 LCD Display Screen gives
Keys &
indication of channels being monitored, battery
Function
power level, volume level, and the status of all
unit features.
Displays
Channel Number Indicator - This large numeral
display indicates the selected operating channel or
the squelch threshold setting when the squelch
key is pressed. This indicator is always active.
Channel Number Indicator
Channel Band Indicator - This display provides
indication of the regular channel band selected,
U.S.A., International, or Canadian.
Channel Band Indicator
Weather (WX) Channel Indicator - This display
provides indication that a weather channel is
currently being monitored.
Weather Channel Indicator
Memory Channel Indicator - This display, in
conjunction with the Channel Number Indicator,
indicates that the channel number displayed has
been entered into the unit memory for selection
when the scan feature is active.
Memory Channel Indicator
Tri-Watch Indicator - This display appears
along with the Emergency (16) and Call (9)
Channel indicators to give notification that the
Tri-Watch (three channel monitoring) feature is
active.
Tri-Watch Indicator