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8 Northstar Explorer VHF Series: 721US, 721EU Operation and Installation Manual
These symbols may not appear at all or may be shown in a different location on the optional handset.
Symbol Meaning
TX Transmitting.
HI LO Transmission power. High (HI) 25 W or Low (LO) 1 W.
WX Weather channel.
WX ALT Weather Alert. Alarm beeps will sound. 721US only.
BUSY Receiver busy with an incoming signal.
PRI Priority channel is selected.
D Duplex operation. Otherwise, blank for Simplex operation.
LOCAL Local calling is selected. Otherwise, blank for distance calling.
DSC DSC capability is available.
Indicates an incoming DSC call, or blinks to notify you of any unread Call Log
messages
Low Battery warning (activates at 10.5 V)
88 Channel selected.
USA INT CAN Selected channel bank for VHF radio operations and regulations.
X Channel is temporarily deleted from the ALL SCAN operation.
B A Channel suffi x, if applicable.
CH1 CH2 CH3 Shows which of the 3 favorite channels, if any, are selected.
Otherwise blank.
ATIS Enabled for use in European inland waterways. Otherwise blank. 721EU only.
DSC DSC capability is available.
ACK A message acknowledging your DSC call is being displayed.
Happy Fish symbol with one to four indicator bars to show the probability of good
fi shing at your current location, based upon barometric pressure and air tempera-
ture. Four bars show that good fi shing is likely. High pressure trends are associated
with stable conditions and calm seas. Research indicates that best fi shing occurs
when barometric pressure is rising and between 1010 and 1022 mb. During these
opportune conditions, most fi sh are thought to feed anywhere within the water
column. However, low pressure trends bring stormy seas and aff ect air bladders,
and these conditions make fi sh move to deeper levels and become less active.
Local weather forecast based on the local temperature and stored barometric pres-
sure data. The icons are indicative only and are more accurate close to land rather
than in open sea.
Digital Readout of the current barometric pressure (in mb or in/Hg) or the current
temperature (in ºC or ºF), depending upon your selection.