33
Overzoom
The Overzoom function allows expanding the chart range. The Overzoom does not provide any additional chart detail, only improves the readability of the available information, act- ing as a magnifying glass.
When the Overzoom is enabled, the unit will add OVZ to the scale displayed in the Navigation window.
To enable/disable the Overzoom function, press GOTO to dis- play the menu bar, then select SETUP/DISPLAY, OVERZOOM and ON/OFF.
Position calibration
All position sensors are affected by intrinsic errors that make the boat’s position incorrect (from few meters to several hun- dred meters).
The position calibration function allows correcting manually the position error present in all GPS, provided that this error is not greater than 2 nautical miles.
Press GOTO and then, by using the joystick, select SETUP/ NAVIGATION, CALIBRATION and then ON. A message will prompt the user to move the cursor to the boat’s true position, appropriately enlarged by the ZOOM+ key.
Press ENTER to move the GPS boat’s position to the point indi- cated by the cursor. This operation will save the calibration for use in future calculations.
NOTE: When the calibration is enabled, the coordinates (latitude/longitude) in the General Info window will be marked by (*).
To cancel the calibration, press GOTO, select SETUP/NAVI- GATION, CALIBRATION and then OFF.
Local time
This function allows entering local time instead of the Green- wich time (GMT) supplied by the GPS receiver.
