JMA-9100 Instruction Manual > 3.BASIC OPERATION > 3.4  GENERAL RADAR OPERATION
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3.4.9 Zoom (x2)
This function doubles the size of radar video near a specified position.
Procedures
1) Left-click the  x2  button located at the lower left of the display.
The zoom mode is selected.
2) Subsequently, put the cross cursor mark on a location you want 
to zoom into, and press the left key of the trackball.
The zoom is set.
Using the cross cursor mark as reference, the zoom function doubles the size of a radar video 
with the midpoint between the cursor mark and own ship’s position being set to the center 
of radar display.
Cance l
1) Left-click the     button located at the lower left of the 
display.
The zoom mode is cancelled.
NOTE:
If the range is 0.125 NM , this function is not available.
Own Ship’s Position before 
Zooming position
HL
Cursor mark
Own Ship’s Position after 
Zooming position
HL
Own ship’s 
position
Center of 
radar display
x2