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5.5 ARPA DATA DISPLAY
(Refer to Example of Display in page 2-1.)
……Display of Vectors ……………………………………………………
A vector to represent a target’s predicted position can be presented in the TRUE vector or RELATIVE
vector mode. In each mode, a vector length can be freely changed for a time interval of 1 to 60 minutes.
[
11
] Vector Mode Selection
True Vector Mode
In the true vector mode, the direction of a target vector indicates the true course of the target and its
vector length is proportional to its speed.
In this mode, own ship’s vector is displayed as shown below.
In this mode, the movements of other ships around own ship can be accurately and easily monitored.
However, no CPA RING can appear in this mode.
● When a target or own ship changes a course, or when a target is acquired, its vector may not
reach a given level of accuracy until three minutes or more has passed after such course change
or target acquisition.
Even if three minutes or more has passed, the vector may include an error depending upon the
tracking conditions.
Attention
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