4. AIS OPERATION
4-6
4.10
Vector Attributes
What is a vector?
A vector is a line extending from a tracked target which shows estimated course of the AIS target.
The vector tip shows an estimated position of the target after the selected vector time elapses. It
can be useful to extend the vector length (time) in order to evaluate the risk of collision with any
target. (See the illustration on page 4-2 for the appearance of a vector.)
Vector time, vector reference
Vector time can be set to 30 seconds, 1, 3, 6, 15 or 30 minutes. You may reference the vectors to
North (True, requires heading and speed data) or ship's heading (relative) as desired.
1. Press the
MENU
key to open the menu.
2. Choose Target and then press the
ENTER
key.
Target menu
3. Choose Vector Time and then press the
ENTER
key.
4. Choose desired vector time and then press the
ENTER
key.
5. Choose Vector Reference and then press the
ENTER
key.
6. Choose Relative or True as appropriate and then press the
ENTER
key.
7. Press the
MENU
key to close the menu.
GPS
Brill/Color
Echo
Mark
Target Trails
Custom 1
Display
Custom 2
Custom 3
Target
ARP
AIS
Manual Tune
Menu
Menu
Target
Target
System
Vector Time
: 6 min
Vector Reference
: Relative
History Dots
: 5
History Intervals
: 1 min
CPA
: 1 nm
TCPA
: 1 min
Proximity Alarm
: Off
S
/
T
/
W
/
X
: Select
[ENTER]: Enter [CANCEL/HL OFF]: Back
[MENU]: Exit
30sec
1min
3min
6min
15min
30min
Relative
True
Vector time choices
Vector reference choices
