## Trip Distance

**Option**

The tool is designed for calculating the distance travelled by the vessel.

| Menu path |
|-------------|
| {{ menu }} → {{ settings }} → Trip distance |

```{note}
The calculation is performed between adjacent positions using the direct geodetic problem for short distances.
```

```{important}
The tool is only available when the option is present.
```

### Function description

The total distance travelled and the distance travelled per voyage, watch, or arbitrary time period are calculated simultaneously.

![Trip](images/Odometr_1.png)

| № | Element | Description |
|---|-----|----------|
| 1 | **Trip distance** | Distance travelled per voyage, watch, or arbitrary time period |
| 2 | **Total distance** | Total distance travelled |
| 3 | **Threshold distance** | Coordinate jitter — a distance equal to twice the vessel position fix error. Designed to prevent false counter triggering when moored or at anchor. When at anchor, it is recommended to set the value equal to the turning circle radius |
| 4 | **Reset Trip** | Reset the Trip distance counter (distance travelled per voyage, watch, or arbitrary time period) |
| 5 | **Reset Total** | Reset the Total distance counter. Reset is only available with elevated privileges |
| 6 | **Service privileges** | Obtain elevated privileges |

![Trip](images/Odometr_2.png)

```{important}
Distance travelled calculation algorithm:
 - the calculation is performed between two adjacent positions;
 - adjacent position: position from EFPS, manual observation, DR, EP;
 - the minimum distance between positions must exceed the set **Threshold distance**;
 - counter increments are calculated once every 30 seconds;
 - if the distance between positions is less than the **Threshold distance**, no increment is calculated.
```

### Counter on the navigational panel

![Trip panel](images/Odometr_3.png)

| № | Element | Description |
|---|-----|----------|
| 1 | Counter | Trip distance / Total distance counter panel<br>![Trip panel](images/Odometr_4.png)<br>The panel can be removed from the navigational panel if necessary |
| 2 | ![Trip panel](images/Odometr_5.png) | Opens the **Trip distance** window for counter management |

```{note}
The counter is purely informational. Counter data is not documented.
```

### Counter applications

 1. **Total Distance**: distance travelled per voyage, per year, or over the ECDIS service life
 2. **Total Trip**: distance travelled per voyage, per watch, per arbitrary time period, or through a particular area of water

```{hint}
The navigating officer may use the counter at their discretion. The use of counters is not regulated by any normative documents.
```
