Furuno FR-8122, FR-8252, FR-8062 manual Vector Attributes

4. AIS OPERATION

4.10Vector Attributes

What is a vector?

A vector is a line extending from a tracked target which shows course of the AIS target. The vector tip shows 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. Vectors may be displayed in True or Relative motion.

1.Press the MENU key to open the menu.

2.Choose Target and press the ENTER key.

Menu

Brill/Color

Display

Echo

Target Trails

Mark

Custom 1

Custom 2

Custom 3

Tuning

GPS Buoy

Target

ARP

AIS

GPS

System

Target

Vector Time	: 6min
Vector Reference	: Relative
History Dots	: 5
History Intervals	: 1min
CPA	: Off
TCPA	: 1min
Proximity Alarm	: Off

[ENTER]: Enter [CANCEL/HL OFF]: Back

[MENU]: Exit

Target menu

3.Choose Vector Time and press the ENTER key.

4.Choose desired vector time and press the ENTER key.

5.Choose Vector Reference and press the ENTER key.

6.Choose Relative or True as appropriate and press the ENTER key. Relative: Other ships move relative to own ship. This mode is useful as an anti-collision aid. If a vessel is on a collision course with own ship its vector will be pointing toward own ship position. True: Own ship and other ships move at their true motions. This mode is useful for discriminating between moving and stationary targets.

7.Press the MENU key to close the menu.

8.Press the MENU key to close the menu.

30sec

1min

3min

6min

15min

30min

Vector time choices

Relative

True

Vector reference choices

4-6