Guard Zone - JRC JMA-9922-6XA Instruction Manual

Marine radar equipment
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[II] Vector Length: VECTOR TIME
‚ T
Setting Vector Time
Procedures
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The vector length of a target is proportional to its speed, and the vector time can be
changed from 1 to 60 minutes.
The figure below illustrates a vector length of a target of six minutes. The tip of the vector
represents the target's expected position in six minutes.
In order to display the relative vector, press the [TRUE/REL] key to select it.
1
Click the numeric section
of • g VECTOR • h .
The numeric input dialogue box is
opened.
2
When changing vector constants, left-click the numbers 0 to 9
or the • g + • h or • g • | • h
3
Click ENT .
The number input will be applied as the vector time.
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Future predicted position
Current position
(Six minutes later in this example)
keys to change the vectors.
5-15
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ARPA STAB
GND
T
VECTOR
LIMIT
1.5
nm
T
PAST POSN
1

GUARD ZONE

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6
min
10
min
1 min
2

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