Garmin GPSMAP 168 Sounder - Manual (Page 55)

44
Reference
Sonar Tab Options
,
,
To calibrate the water speed:
1. From the ‘Sonar’ tab, use the ARROW KEYPAD to highlight ‘Calibrate Water Speed’ and press
ENTER/MARK.
2. Bring the boat to a cruising speed. Both the top ground and uncalibrated water speeds will be
shown at the bottom of the calibration window. Note your top speed, then stop the boat and
press ENTER/MARK.
3. By default, the top ground speed will automatically show in the ‘What was your top water speed?’
fi eld. If a ground speed is not available, the top uncalibrated water speed will be used instead. If
the new speed is correct, highlight ‘OK’ and press ENTER/MARK. If you wish to manually enter a
calibration, press ENTER/MARK on the speed fi eld, enter a new speed and press ENTER/MARK.
4. You may also press MENU from the calibration screen and choose ‘Use Top Ground Speed’ to
default back to ground speed or ‘Use No Calibration’ to use the speed sensor’s uncalibrated speed.
If the boat is not moving fast enough or the speed sensor is not outputting a speed, you
will see a “Boat Is Not Moving Fast Enough To Calibrate” message at the bottom of the
display. Check that the speed sensor wheel is moving or safely increase boat speed.
If there is a problem with the speed sensor/unit or if a speed senor is not installed, a
‘Water Speed Sensor Is Not Working’ message will appear at the bottom of the display.
Check connections of speed sensor cables.
• Setup Page Layout— allows you to change the text size and number of data fi elds that will be
displayed.
• Change Data Fields— allows you to specify the type of data displayed in each data fi eld used
on the map display.
For detailed instructions on changing the data fi elds and layout of the Sonar Page, see page 35-37.
An error message will appear if the
speed sensor is not working or not
installed.
If a ground speed is not available, the
unit will use the uncalibrated water
speed.
168 Manual Part 1.indd 44 11/18/2002, 3:36:38 PM