5ļ¼10
JMA-9100 Instruction Manual > 5.OPERATION OF TARGET TRACKING AND AIS > 5.1 PREPARATION
Therefore, the True / Relative mode shall optionally be used for the purpose of
observation: the True vector mode for grasping the true aspect of a target, and the
Relative vector mode for grasping a targetās closest point of approach (CPA).
Fig 5-5: Relative Vector
5.1.3.3 Vector Length (Vector Time)
The vector length of a target is proportional to its speed, and the vector time can
be switched in a range of 1 to 60 minutes.
The diagram below illustrates a vector length of a target for 6 minutes, and the tip
of the vector represents the target's position expected to reach 6 minutes later.
Fig 5-6: Vector Length
Refer to Section 5.1.6 "Setting Vectors (Vector Time)".
The true vector is
not displayed
Relative vector
CPA ring
HL
Current position
Future predicted position
(6 min later in this example)
HL
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