4.1 Use of Navigation Tools
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4.1.1 Using Cursor (Cursor)
Procedures 1 Move the cursor onto the PPI display by moving the trackball.
When the cursor is moved onto the PPI display, the arrow cursor turns into a cross
cursor.
4.1.2 Using Range Rings [RR / HL]
Procedures 1 Press the [RR / HL] key.
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The range ring display switches disappear and appear between display and
non-display each time the [RR / HL] key is pressed. The range ring interval is
shown in the Range Rings display on / off (upper left of the display ② on page 2-16).
The range between the target and own ship can be determined by visually measuring
the target's position that lies between two range rings.
For change of the brilliance of range rings, refer to Section 3.8.5.
4-2
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