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3. TARGET TRACKING (TT)
3-17
True vector
Own ship and other ship's move on the display at their true speeds and courses.
This mode is useful for distinguishing moving targets from stationary ones.
True vectors in
head-up mode
Relative vectors in
head-up mode
B
Own ship
A
B
Own ship
Buoy
Buoy
Target on
collision
course
A
True and relative vectors
Relative vector
Other ships move relative to your ship. This mode is useful for finding ships on a
collision course with your ship. A ship whose vector passes through your ship's
position is on a collision course.
3.10.2 Vector mode and length
Vectors may be displayed in true or relative mode. Vector time (or the length of
vectors) can be set between 1 and 60 minutes.
By keyboard
1. Press the [VECTOR MODE] key consecutively to select relative or true
vector mode. Your selection is shown on the vector motion box. (Note that
this also selects the vector mode for the past position display.)
2. Press the [VECTOR TIME] key consecutively to select vector time. Your
selection appears in the vector time box (see illustration below).
By trackball
1. Use the trackball to select VECTOR TRUE-S(or -G) or VECTOR REL
(whichever is displayed) at the right side of the screen.
VECTOR TRUE-S* 15MIN
Vector mode
Vector
time
* TRUE or REL
S: Sea stablized
G: Ground stabilized
(No stabilization
indication in relative.)
TT VECTOR boxes