JRC JMA-5212-4, User Manual

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5.1.3 TT Data Display
(Refer to Example of Display in Section 2.1 “EXAMPLE OF DISPLAY.”)
Display of Vectors
A vector to represent a target’s predicted position can 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.
The True and Relative vector can be switched by using software button
Ԙ
located at the other ship's
information area in Section 2.3.6.
[I] 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.
The relative vector is
not displayed
True vector
Own ship
㵭
s position HL
z
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