During setup for NavBus instruments, set NavBus to 
and assign the instrument a NavBus group number (see section
Black Power/data cable
Orange
Blue
Other Navbus instrument
18-9-1 Installation: Northstar VHF radio
Fit and set up the optional Northstar VHF radio (with NavBus functionality) following the instructions supplied with the radio.
Black Power/data cable
Orange Blue
Blue Grey
Radio data cable
18-10 Installation: Other NMEA instruments
NMEA is an industry standard for interconnecting instruments. It is not as flexible or as easy to install as NavBus.
The 657 can:
Receive and display wind speed and direction from an optional compatible wind instrument.
Receive and display depth, paddlewheel boat speed and water temperature from an optional compatible instrument.
Receive data from an optional compatible GPS or GPS/DGPS source.
Send GPS position and other navigation data to an autopilot or other instrument. An autopilot requires APB, APA and VTG sentences (see section
Receive data from an optional AIS receiver.
For information on sending NMEA data to the 657, see your Northstar dealer.
During setup to send NMEA data to other instruments, set NMEA out to 
and specify the NMEA data to send (see section
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Black |
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| GPS antenna |
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Yellow |
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| Fuel Cable) |
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| Shield Ground | |
82 | Northstar Explorer 657 Installation and Operation Manual |