## Vectors and Trajectory (Vector settings)

| Menu path |
|-------------|
| {{ menu }} → {{ settings }} → Targets → Portrayal |

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

![Vector and trajectory settings form](images/Targets_Portrayal_2.png)

| 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

![Vector and trajectory settings form](images/Targets_Portrayal_3.png)

| 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

![Vector and trajectory settings form](images/Targets_Portrayal_4.png)

| 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

![Vector and trajectory settings form](images/Targets_Portrayal_5.png)

| 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

![Example of vector display on the chart](images/Targets_Portrayal_6.png)

| 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.
```
