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3-7 Setup > Comms
Use this feature when the FISH 4500/4600 is
connected to other Navman instruments through
NavBus or any compatible NMEA instrument.
Press MENU once or more until the Setup menu
is displayed, then select Comms:
NMEA Out
NMEA is generally used with third party instru-
ments. Select to transmit NMEA sentences (see
Appendix A - Specifications).
NMEA data
Use this to specify which NMEA sentences will
be transmitted (see Appendix A - Specifications
and section 5-7 Data display, for information
about how to display NMEA data).
NavBus
NavBus is the preferred method for connecting
the FISH 4500/4600 to other Navman instru-
ments. Select if the instruments are connected
using NavBus.
NavBus Group
Use this when a group of Navman instruments
are connected together using NavBus, to specify
a group of instruments for backlighting, if required.
Then, if the backlight setting on one instrument
in the group is adjusted, the other instruments
change automatically. Otherwise, select 0.
3-8 Setup > Calibrate
Press MENU once or more until the Setup menu
is displayed, then select Calibrate:
The fuel options can
be calibrated only
when the optional sin-
gle or twin engine kit
is installed on petrol/
gasoline engines.
Speed
Calibration may be required because different hull
shapes have different flow characteristics.
Obtain an accurate measurement of the boat’s
speed from a GPS receiver; or by following another
boat travelling at a known speed; or by making a
timed run over a known distance.
Note: for accurate calibration:
• The speed from a GPS receiver should be
greater than 5 knots.
• The speed from another paddlewheel trans-
ducer should be between 5 and 20 knots.
• Best results are achieved in calm conditions
where there is minimal current (best at high or low
tide).
Use the cursor keys to display the speed readout
box, then increase or decrease the readout to
match the independent speed value.
Speed Filter
Increase this setting to stabilise an erratic speed
reading. Decrease to improve reading respon-
siveness. The speed filter can be set from 0 to
30 seconds.
Temperature
The factory settings should be sufficiently accurate
for normal usage. To calibrate the temperature
readout, first measure the water temperature with a
thermometer known to be accurate.
Use the cursor keys
to display the temperature
readout box,
then increase or decrease the value
to match the measured temperature. The tempera-
ture can be set from 32° to 99.9°F (0° to 37.7°C)
with a resolution of 0.1° unit.
To change the units between °F (Fahrenheit) or °C
(Celsius), see section 3-6 Setup > Units.
Temp filter
Increase this setting to stabilise an erratic tem-
perature reading. Decrease to improve reading
responsiveness. The temperature filter can be
set from 0 to 30 seconds.
FISH 4500/4600 Installation and Operation Manual 13
NAVMAN