11-1 installation: northstar vhf radio, Navbus and the instrument, 10 installation: other navbus instruments – NorthStar Navigation Multi-Function Unit M84 User Manual

Page 99

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Northstar M121/M84 Installation and Operation Manual

98

20-11-1 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

NavBus is Northstar’s system for connecting
instruments together to interchange data
and share transducers. When instruments are
connected by NavBus:

If the units, alarms or calibration are

changed in one instrument, then the
values will automatically change in all other
instruments of the same type.

Each instrument can be assigned to a group

of instruments. If the backlight is changed in
an instrument in group 1, 2, 3 or 4 then the
backlight will automatically change in the
other instruments in the same group.

If the backlight is changed in an instrument
in group 0 then no other instruments are
affected.

If an alarm sounds, mute it by clearing the

alarm on any instrument which can display
that alarm.

NavBus and the Instrument

The M121/M84 can:

Display wind speed and direction from an

optional Northstar Wind instrument

Receive and display depth from an optional

Northstar depth instrument.

Receive and display boat speed and water

temperature from a paddlewheel sensor on
an optional Speed instrument.

Receive data from an optional Northstar

VHF radio (with NavBus functionality). The
M121/M84 can display:

Baro: barometric pressure

Baro history: barometer history

Weather: a predication, based on changes
in barometric pressure

20-10 Installation: Other NavBus instruments

Fish forecaster: a prediction based on
changes in barometric pressure

DSC/Buddy Track: (see section 17)

Receive data from an optional GPS or

GPS/DGPS source.

Send data to optional Northstar instruments,

for example to a repeater.

During setup for NavBus instruments, set
NavBus to and assign the instrument a

NavBus group number (see section 19-12)

Black

Power/data cable

Orange

Blue

NavBus wires to other

NavBus instruments

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