Furuno FAR-1416, Operator'S Manual

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3. TARGET TRACKING (TT)
3-10
3.8 Vector
The vector on a tracked target is a line that represents the target’s speed and course.
The tip of vector is the predicted target position after the set vector time has passed.
You can predict a possible collision with another target by extending the vector length
(time).
To change the vector mode, move the cursor onto the vector reference indication in
the VECTOR box, then press the
left button . The vector reference cycles through
True and Relative with each press the left button .
3.8.1 Types of vectors
True vector
True vector indicates the true movement of own ship and other ship relative to a land-
mass. Use this mode to identify a distinguish target from a fixed target.
Relative vector
Relative vectors on targets that are not moving over the ground such as land, naviga-
tional marks and ships at anchor will represent the reciprocal of own ship's ground
track. A target whose vector passes through own ship is on a collision course. (Dotted
lines in the figure are for explanation only.)
Ground stabilization/Water stabilization
The true vector mode display can be ground stabilized or sea stabilized. You can
switch between ground stabilization and sea stabilization at [SHIP SPEED] in the
[SHIP SPEED SETTING] menu. Select [LOG (BT)] for ground stabilization or [LOG
(WT)] for sea stabilization. In the true vector mode, [T] is displayed in the vector mode
box.
Sea stabilization is a display method using heading and speed through the water.
Ground stabilization uses speed over the ground or current correction. When accura-
cy is low, current is corrected.
Vector
Vector time
Vector time is set at [10 min].
Current target position
Predicted target position after 10 min.
Buoy
Own Ship
True vectors in ground
stabilization
AIS
Buoy
Own Ship
True vectors in sea
stabilization
TT
AIS
TT
Buoy
Own Ship
Relative vectors
AIS
TT
Current
(Set and drift)