Garmin gpsmap 178, 178c Manuale Utente

0

1.   On the Sonar tab, use the ARROW KEYPAD to highlight ‘Calibrate Water Speed’ and press ENTER.
2.  Bring the boat to a cruising speed. The top ground and uncalibrated water speeds are shown at the 

bottom of the calibration window. Note your top water speed, then stop the boat and press ENTER.

3.  By default, the top ground speed is automatically shown in the ‘What was your top water speed?’ 

field. If a ground speed is not available, the top uncalibrated water speed is used instead. If the new 
speed is correct, highlight ‘OK’ and press ENTER. If you wish to manually enter a calibration, press 

ENTER on the speed field, enter a new speed and press ENTER.

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. 

NOTE: If the boat s not movng fast enough or the speed sensor s not outputtng a 
speed, you see a “Boat Is Not Movng Fast Enough To Calbrate” message at the bottom 
of the dsplay. Check that the speed sensor wheel s movng or safely ncrease boat 
speed. If there s a problem wth the speed sensor/unt or f a speed senor s not nstalled, 
a “Water Speed Sensor Is Not Workng” message appears at the bottom of the dsplay. 
Check connectons of speed sensor cables.

•  Set Up Page Layout — layout of the data fields may also be changed to show more fields (with a 

smaller number size) or less fields (with a larger number size). See page 29.

•  Change Numbers — allows you to specify the type of data displayed in each data field. For detailed 

instructions on changing the data fields on the Sonar Page, see pages 

30-31

.

•  Page Defaults — restores the Sonar Page settings to the original factory setup.

1.  Press MENU. With ‘Page Defaults’ highlighted, press ENTER. 

I