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Note: This option is not available for the 40/40 HV display
• Display group: Sets the network group for the unit
• Instance: Sets the network instance for the unit
For more information about network groups and instance settings,
refer to "Network" on page 59.
Calibration
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Note: Once the unit is setup and before you proceed with
calibration ensure all network sources are selected and
configured. Refer to "System settings" on page 59.
Boat speed
Speed calibration is necessary to compensate for hull shape and
paddlewheel location on your boat. For accurate speed and log
readings, it is essential that the paddlewheel is calibrated.
SOG reference
This is an auto calibration option that uses speed over ground (SOG)
from your GPS, and compares the average of SOG against the
average boat speed from the speed sensor for the duration of the
calibration run.
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Note: This calibration should be made in calm sea with no
effect from wind or tidal current.
• Bring the boat up to cruising speed (above 5 knots), then
• Select the SOG reference option
When the calibration is completed the Boat speed calibration scale
will show the adjusted percentage value of the boat speed.
Distance reference
Allows you to calibrate the log via a distance reference. You will
need to complete consecutive runs, under power at a constant
speed made along a given course and distance.
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Note: The distance should be greater than 0.5 NM, ideally 1 NM.
To eliminate the effect of tidal conditions it is advisable to
perform at least two runs, preferably three, along the measured
course.
54
Software setup | IS42 Operator Manual
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