Garmin GPSMAP 235 Sounder - Manual (Page 47)

37
GETTING START-
ED
Using the GOTO
Key
Sounder Setup Page (con’t.)
To use Auto Calibration:
1. Ensure ‘Auto Calibrate?’ is displayed in the speed calibration field. If it is not, press
O to display the calibration menu.
2. Highlight ‘Auto Calibrate’ and press T .
3. Press T again and an instruction message will appear.
4. Read the instructions and press T when you are ready to begin calibration.
5. Slowly accelerate your boat to a maximum safe cruising speed and then back
down to a stop and press T . The minimum and maximum speed which the unit
is now calibrated for will be displayed in the ‘calibrated range’ field.
6. Auto calibration is complete.
When manual calibration mode is selected, the speed calibration bar will
appear as a white horizontal strip with a black slider bar.
Before entering the calibration, you will need to compare the value shown on
the speed calibration field’s STW display, with your boat’s actual speed as deter-
mined by the speedometer or by using a stop watch. Accelerate to a safe speed and
compare the two speed readings.
SECTION
3 SOUNDER PAGE
Speed Calibration Setup
A B
A. When you are ready to begin calibration, read
the instructions and press EDIT/ENTER.
B. When manual calibration mode is selected, the
speed calibration bar will appear as a white hori-
zontal strip, with a black slider bar positioned in
the middle.
19000138.10A.QXD 11/11/99 8:47 AM Page 37