Depth; Units, Keel Offset; Temperature; Units, Temp Cal - Navman FISH 450 Tricolor Installation And Operation Manual

4-3 Depth

Access the Depth menu through the Setup
menu screen.
Units
Pressing the Cursor Right key when Units
is highlighted cycles through the options: M
(metres) FT (feet) or FA (fathoms).
Keel Offset
Keel Offset is the distance between the
Use Keel Offset either when the transducer is located below the water surface but
a display of total water depth is
required, or when depth of water
below the boat's keel is required.
Water surface
Depth of transducer
Enter positive values to display depth as measured from a point above the transducer (e.g. Water surface).
Enter negative values to display depth as measured from a point below the transducer (e.g. keel).

4-4 Temperature

Access the Temperature menu through the Setup
menu screen.
Units
Press the Cursor Right key when Units is highlighted
to switch between °C (Celsius) and °F (Fahrenheit).
Temp Cal
The temperature readout may be calibrated.
Calibration requires accurate measurement of the
4-5 Speed and Log
Access the Speed and Log menu through the
Setup menu screen.
Units
Pressing the Cursor Right key when Units is
highlighted will cycle through the options: KTS (knots),
MPH (miles per hour) or KPH (kilometres per hour).
Speed Cal
To calibrate speed, an accurate measurement of
the boat's speed is required.
Obtain the speed either from a timed run over a
known distance, or from another instrument (e.g.
GPS, DGPS or calibrated speedometer). The
calibrated instrument may be on board or on
another boat travelling alongside.
Notes for accurate calibration:
• GPS speeds are only accurate enough when
above 20 knots, DGPS when above 5 knots. Best
results are achieved in calm conditions where
there is minimal current (best at high or low tide).
• Paddlewheel devices are generally accurate
enough when between 6 and 20 knots.
NAVMAN
FISH450 Tricolor FISHFINDER Installation and Operation Manual
location of the depth transducer
and the point the displayed depth
is measured from.
Press the Cursor Up or Down key
to highlight Keel Offset, then press
the Cursor Right key to select it.
Press the Cursor Left and Right
key to change the value, then press
the Menu key to save and exit.
Transducer
Note: Boat illustrated uses a through hull transducer
water temperature at the same point as the Aquaducer
(or through hull speed/temperature transducer).
Press the Cursor Up or Down key to highlight Temp
Cal, then press the Cursor Right key to select it.
This will display the FISH450 Tricolor's temperature
measurement. Press the Cursor Left and Right key
to change the value to the actual water temperature,
then press the Menu key to save and exit.
Continue travelling at the same speed and calibrate
the speed as follows:
Press the Cursor Up or Down key to highlight Speed
Cal, then press the Cursor Right key to select it.
This will display the FISH450 Tricolor's uncalibrated
speed measurement. Press the Cursor Left and
Right key to change this to the actual speed, then
press the Menu key to save and exit.
Log (Select)
Selects which log is displayed on the Data screen,
both the Total and Trip logs are always kept in the
FISH450 Tricolor but only the selected log is displayed.
Speed Cal
Speed may also be calibrated using Log Cal.
Log Cal
The log may also be calibrated using Speed Cal.
The Trip Log is used to perform a log calibration. First
zero the trip log (see below) then travel a known distance
in a straight line, stop at the destination and perform
calibration as soon as practical. Best results are
Positive value
Negative value
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