6-17  Section 6    Target Tracking and AIS 
 
 
 
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6.4.2.2  Setting vector mode 
1 
Click on the trail true/relative selector button in the other ship information window. 
 
 
 
Each click switches track display mode between [T] and [R]. 
 
6.4.2.3  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 120 minutes.   
The following figure shows an example in which the Vector Length is set to 6 min, and the tip of the 
vector represents the target's position expected to reach 6 minutes later. 
 
 
 
   
HL 
Current position 
Future predicted 
position 
(6 min later in this 
example) 
Example of Vector Length 
 
Trail true/relative selector button