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Northstar
Explorer VHF Series: 721/725
Operation and Installation Manual
Northstar
Explorer VHF Series: 721/725
Operation and Installation Manual
3-6 Set the Priority Channel (WATCH MODE)
If you have the 721/725 EU, watch mode is similar to a dual watch, scanning between the priority channel
and the working channel. CH16 is the priority channel.
If you have the 721/725 US and are operating on USA or Canadian channel banks, you can set the priority
channel to cover both CH16 and CH09 as well as the working channel, as follows:
1. Select RADIO SETUP, then WATCH MODE.
2. Select ONLY 16CH for dual watch mode, or
16CH+9CH for tri watch mode.
3-7 Weather Alert (WX ALERT)
(US only)
The NOAA provides several weather forecast channels on USA and Canadian channel banks. If severe weather
such as storms or hurricanes are forecast, the NOAA broadcasts a weather alert on 1050 Hz. You can set up
the radio to pick up weather alerts, as follows:
1. Select RADIO SETUP, then WX ALERT.
2. Select ON then press ENT or push the rotary
knob to confirm the setting and return to the
menu. (If you select OFF, WX channel will not
be watched during scanning.)
3. When a weather alert is broadcast, the alarm
will sound. Press any key to hear the weather
alert voice message.
3-8 NMEA or NAVBUS protocol (COM PORT)
(721 / 725 only)
You can add the radio to a group of instruments using NMEA or NAVBUS protocol.
NAVBUS is automatically activated when present, so that data such as barometric pressure and history,
temperature, DSC polling positions and distress data are available to any other Northstar instruments using
NAVBUS. However, the barometric and temperature readings from the radio can be turned OFF if you prefer
to use the readings from a different instrument.
Select your GPS data source to come from either NMEA or NAVBUS as follows:
3-8-1 NMEA CHECKSUM
RADIO SETUP
WATCH MODE
WX ALERT
> COM PORT
NMEA
CHECKSUM
> ON
OFF
COM PORT
> NMEA
GPS SOURCE
BARO & TEMP
1. Select RADIO SETUP, then COM PORT.
2. Select NMEA, then press ENT or push the rotary knob to show the CHECKSUM option.
3. CHECKSUM on is the usual setting. The cursor is at ON. Press ENT or push the rotary knob to confirm the
setting and return to the menu.
RADIO SETUP
INT SPEAKER
WATCH MODE
> WX ALERT
WX ALERT
ON
> OFF
RADIO SETUP
KEY BEEP
INT SPEAKER
> WATCH MODE
WATCH MODE
> ONLY 16CH
16CH+9CH