8-13  Section 8    Functions of the ECDIS (Option) 
 
 
 
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2  Using the trackball, move the cursor to "A" located at the upper left of the range you 
want to enlarge, and then click. 
3  Using the trackball, move the cursor to "B" located at the lower right of the range you 
want to enlarge, and then click. 
The enlarging range is enclosed with a rubber band and then that range is enlarged to the full 
screen size. 
Once enlarged, the zoom cursor changes back to the cross-hair cursor. 
 
 
 
 
Memo 
Switching charts 
•  Generally, multiple charts with different scales are provided for the same area; charts having 
matching scale values are selected/displayed by enlargement or reduction. 
•  When a displayable scale range is assigned to an original scale of a chart and the original scale 
is beyond this range, the chart will not be displayed unless there are other displayable charts. 
•  This equipment is installed with a world map background chart as the reference chart and the 
chart is always displayed in the background. 
   
Selected area