## Anchor Watch

**Anchor watch** monitors the position of an anchored vessel and ensures there is no drift by keeping the vessel within a safety radius.

| Menu path |
|-------------|
| {{ menu }} → {{ btn_anchor_watch }} → **Radius** → **Activate** |

### Anchoring

When approaching the anchoring point, press {{ btn_anchor_watch }}

#### 1. Enter the safety radius

Enter the **Radius of safety circle**.

![Safety radius input window](images/Anchor_Watch_1.png)

```{attention}
**Safety radius** is calculated in advance by the navigating officer.
```

#### 2. Activate anchor watch

At the point of letting go the anchor, press **Activate**.

```{hint}
The anchor is let go while the vessel has sternway.
Activating **anchor watch** fixes the anchor dropping point.
```
![anchor down](images/Anchor_Watch_2.png)

When anchor watch is activated, the **anchor watch** button shows: Anchor watch on.

![Active anchor watch icon](images/anchor-watch-on-icon.png)

```{hint}
As the vessel weighs on the anchor chain and moves astern, the monitoring sector will be oriented along the course vector, in the direction of the stern.
```

### Chart display

The chart will display the set safety circle and the anchor symbol at the anchor dropping point.

The safety zone is bounded by an **orange** circle.

![Anchor watch — normal condition](images/Anchor_Watch_3.png)

```{hint}
The vessel is within the safety radius.
```

### Drift monitoring

When the vessel outline exceeds the safety radius, the circle and the anchor symbol will turn **red**, and a Warning (Anchor watch) will be generated.

![Anchor watch — warning](images/Anchor_Watch_Warning.png)

![Anchor watch warning window](images/Anchor_Watch_4.png)

```{important}
If the warning is not acknowledged by the navigating officer within **2 minutes**, and the vessel outline exceeds the safety radius, the warning escalates to an Alarm.
```

```{danger}
A tendency of the vessel to move beyond the safety radius may indicate that the anchor is dragging, and the navigating officer must take all measures to prevent the development of an emergency situation.
```

![Anchor watch alarm window](images/Anchor_Watch_Alert.png)

### Return to the safety zone

If the vessel outline returns within the safety circle, the warning/alarm becomes inactive.

When anchor watch monitoring is disabled, all warnings are cleared.

```{tip}
**It is recommended to calculate the safety radius** in accordance with the methods and recommendations adopted for the given vessel.
This manual does not contain any recommendations on calculating anchor chain length or the safety radius.
```
