## ENC Cell Corrections

### Installing Updates

Update sets are provided by the data provider (data server). ECDIS treats update files as cells, and the installation procedure in ECDIS is identical to the {doc}`**chart installation** </sections/enc-collection-management/enc-cell-corrections/index>` procedure.

**Update installation procedure:**

1. Insert the **USB medium** with the data set into the ECDIS USB port

2. | Menu path |
   |-------------|
   | {{ menu }} → {{ data_set }} → ENC → Find ENC → Select → Install |

![Update installation dialog](images/ENC_Coll_3.png)

3. In the dialog, select from the drop-down list the name of the set into which the updates should be installed

![Set selection for updates](images/ENC_Coll_4.png)

```{important}
Updates can only be installed into the set for which they were issued. For example: if cells are installed in the IHO set, then updates issued for those cells must be installed into the IHO set.

Attempting to install updates into a different set will result in the installation being refused.
```

4. Press **Install**.

5. The installation result will be displayed as a notification at the bottom of the window and recorded in the **Installation Log**

The update installation result is recorded in the **Installation Log**, and information about installed updates is updated in the **ENC Collection (Data Set)**.

### Viewing Corrections

ECDIS maintains a log of installed and applied update sets for ENCs. Corrections are viewed through the **Chart Collection (Data Set)**.

For cells that have corrections, a button in the form of an ellipsis **`[...]`** will be displayed. In the chart collection panel, the cell also shows the **last applied update number (Update No) and update date (Update Date)** — the date of the last installed correction.

![Corrections information panel](images/ENC_Call_5.png)

| No. | Element | Description |
|---|---------|----------|
| 1 | Update No | Number of the last applied correction |
| 2 | View button | Button to view cell updates |
| 3 | Update Date | Date of the last installed correction |

**Viewing changes in a cell:**

| Menu path |
|-------------|
| {{ menu }} → {{ data_set }} → ENC → Data Set → Select → `...` |

A list of corrections for the selected cell will open.

![Correction viewing interface](images/ENC_Coll_6.png)

| No. | Element | Description |
|---|---------|----------|
| 1 | List of applied updates | With update number and issue date |
| 2 | Enable frame | Enable/disable cell frame |
| 3 | Centre | Centre the screen on the cell |
| 4 | Open | Open the correction issue list |
| 5 | Delete | Deletes the selected correction and all subsequent corrections issued later |
| 6 | Back | Return to the **ENC collection** |

**Detailed correction view:**

1. Open the selected ENC update issue

![Detailed correction list](images/ENC_Coll_7.png)

| No. | Element | Description |
|---|---------|----------|
| 1 | Object | Correction object name |
| 2 | Update No | Number of the correction being viewed |
| 3 | On ENC | Association of objects from the list with the object on the ENC |
| 4 | Update date | Date of the applied correction issue |
| 5 | Operation | Performed operation: installed, deleted, moved, modified, etc. |
| 6 | Centre | Press to centre on the correction object |
| 7 | List | List of correction objects included in the issue |
| 8 | Show/Hide | Press to rebuild the ENC, display and highlight correction objects of the issue on the ENC. Pressing again removes the highlighting.|
| 9 | Back | Press to return to the **ENC collection** |
| 10 | Correction | Highlighted correction objects |
