JRC JMA-5212-4/6 User Manual page 214

[4] MAP Center Position
This method corrects a chart position by entering the values of latitude and longitude at own ship's
position in manual mode.
If latitude and longitude data sent by the navigation equipment has been entered, the data has priority
over the manually entered values.
1 Press [4] key while the MAP Display Setting Menu is open.
The latitude / longitude input screen for the Map Center Position menu will appear.
2 Enter the value as latitudinal, pressing the numeric keys.
To switch between the north latitude and south latitude, turn the [MULTI] control.
3 Press [ENT] key.
The entered value will be determined as latitude.
4 Enter the value as longitude, pressing the numeric keys.
To switch between the east longitude and west longitude, turn the [MULTI] control.
5 Press [ENT] key.
The entered value will be determined as longitude.
Note: The function is available in the plotter mode only.
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