Vectors and Trajectory (Vector settings)

Menu path
→ → Targets → Portrayal

Configuration of symbol, vector, and trajectory display for own ship and AIS targets is performed in the Vector settings section.

No.	Parameter	Description
1	Ownship	Own ship display settings group
2	AIS Target	AIS target display settings group
3	ARPA Target	ARPA target display settings group

Own Ship

No.	Parameter	Description
1	Portrayal	Own ship display settings group on ENC
2	True scale outline	Displays the vessel as a true-scale outline on the ENC if the vessel size is 6 mm or more. If heading sensor data is unavailable, the true scale outline display is unavailable and the toggle is locked
3	Path predictor	Enables the path prediction line. The prediction line is constructed accounting for the vessel’s speed and ROT. The line is drawn from the CCRP
4	Heading line	Displays the heading line and traverse line
5	Auxiliary heading line	Extended heading line. Displayed in red
6	Vectors	Own ship vector settings group
7	True vector	True vector of the vessel: COG/SOG
8	Relative vector	Relative vector of the vessel: HDG/STW
9	Vector length	Vector length in minutes. Vectors change dynamically when the vessel’s speed changes
10	Vector mark step	Time marks on vectors. The step is set in minutes
11	Track	Vessel track settings group
12	Reset	Reset track display
13	Vessel track	Enables vessel track display on the ENC
14	Time mark	Enables time marks display on the track
15	Track length	Sets the track length by time
16	Time mark step	Sets the time mark interval — how frequently marks are placed

AIS Targets

No.	Parameter	Description
1	Portrayal	AIS target display settings group on ENC
2	True scale outline	Displays AIS targets as true-scale outlines on the ENC if the vessel size is 6 mm or more. If heading sensor data is unavailable, the target outline display is unavailable
3	Path predictor	Enables the path prediction line for AIS targets. The prediction line is constructed accounting for the vessel’s speed and ROT. The line is drawn from the CCRP. The prediction line is only constructed when ROT data is available from the AIS target
4	MMSI/Name	Enable display of AIS target MMSI/Name. Priority is given to the name
5	Vectors	AIS target vector settings group
6	True vector	True vector of the target: COG/SOG
7	Relative vector	Relative vector of the AIS target: target’s relative motion vector
8	Vector length	Vector length in minutes. Always equal to the own ship vector length
8	Vector mark step	Time marks on vectors. Always equal to the own ship vector mark step
9	Track	AIS target track settings group. Target track settings may differ from own ship settings
10	Vessel track	Enables target track display on the ENC
11	Track length	Sets the track length by time
12	Track interval	Target track mark interval. The target track is displayed as discrete points

ARPA Targets

No.	Parameter	Description
1	Vectors	ARPA target vector settings group
2	True vector	True vector of the target
3	Relative vector	Relative vector of the ARPA target: target’s relative motion vector
4	Vector length	Vector length in minutes. Always equal to the own ship vector length
4	Vector mark step	Time marks on vectors. Always equal to the own ship vector mark step
5	Track	ARPA target track settings group. Target track settings may differ from own ship settings
6	Vessel track	Enables target track display on the ENC
7	Track length	Sets the track length by time
8	Track interval	Target track mark interval. The target track is displayed as discrete points

Display parameters

No.	Parameter	Description
1	Own ship	Own ship marker. Off-scale symbol
2	Track	Track history
3	Relative vector	Relative vector of the vessel: HDG/STW
4	Vector mark step	Time marks on vectors
5	Own ship True vector	True vector of the vessel: COG/SOG
6	AIS target True vector	True vector of the target: COG/SOG
7	Path predictor	Enables the path prediction line for AIS targets. The prediction line is constructed accounting for the vessel’s speed and ROT. The line is drawn from the CCRP. The prediction line is only constructed when ROT data is available from the AIS target
8	AIS Target	Off-scale symbol of an AIS target
9	AIS Name	Name or MMSI of the AIS target
10	AIS Track	AIS target track marks
11	True scale outline	AIS target as a true-scale outline. The AIS installation point is displayed within the outline
12	Relative vector	Relative vector of the AIS target: target’s relative motion vector
13	ARPA Target	Off-scale symbol of an ARPA target
14	True vector	True vector of the target
15	Relative vector	Relative vector of the ARPA target: target’s relative motion vector

Vector types

True vectors

• Own ship: Shows the actual direction and speed of the vessel’s movement over the ground

• AIS targets, ARPA targets: Display the true direction and speed of target movement

• Vector length: Proportional to speed and the set forecast time

Own ship relative vector

• Heading + Log: Shows the vessel’s heading direction and speed through the water

• Requirements: Heading and speed sensors are required

• Application: To verify that actual movement matches the set heading

Target relative motion vectors

• Purpose: Show target movement in relative motion

• Application: For assessing collision risk and maneuvering

• Calculation: via the velocity triangle

Track settings

Display parameters

Parameter	Value range	Recommendations
Track length	1-999 minutes	30-60 minutes for normal navigation
Time mark step	1-60 minutes	5-10 minutes for detailed monitoring
Vector length	1-999 minutes	6-12 minutes for forecasting
Vector mark step	1-60 minutes	2-5 minutes for accurate forecasting

Caution

Own ship vectors and all target vectors must be configured synchronously to avoid misinterpretation of the situation.

Vessel outlines

Important

The True scale outline function displays vessels at chart scale according to their dimensions. If heading data is unavailable, the function is disabled.

Working with VDES targets

Important

The VDES target vector is only constructed if the VHF radio station broadcasts the $PNAVRIS (18) sentence or the $--VDO sentence Message 1, 2, or 3.

VDES target settings are synchronized with AIS target settings.

VDES target characteristics

• Identification: By MMSI code instead of name

• Vectors: Available when data is transmitted correctly

• Tracks: Displayed similarly to AIS targets

• Outlines: Not supported

Warning

In high traffic density, disable target name display to reduce screen clutter.

Note

All vector and trajectory settings are saved automatically and applied to all new targets appearing on the screen.