## ENC by Route (Charts by route)

| Menu path |
|-----------|
| {{ menu }} → {{ menu_routes }} → Select Route → **Charts by Route** |

The **ENC by route** check allows the navigator to obtain a complete list of ENCs through which the selected route passes, and to verify their currency for a specified voyage period.

### Procedure for obtaining the ENC list by route

1. **Select a route:**
   - Open the section {{ menu }} → {{ menu_routes }}
   - Select the required route in the list
![Route list](images/Route_Selected.png)

   - Press **Charts by Route**
![Empty ENC list](images/Route_Charts_List_Empty.png)

| № | Element | Description |
|---|---------|-------------|
| **1** | **Find Charts** | Select ENC cells along the route. The selection includes all cells intersected by the route leg, taking into account the calculated safety zone |
| **2** | **Select All** | Selects all cells in the list |
| **3** | **Back** | Return to the previous window |

2. **Specify the voyage period:**
   - In the dialog, specify the **departure date** for the route
   - Press the **Open** button

![Voyage start date selection dialog](images/enc-date-selection.png)

3. **Analyze results:**
   - A table with the ENC list for the route will open
   - The system will automatically check the currency of all ENCs for the date range from the start to the end of the voyage

![ENC by route table](images/enc-by-route-table.png)

### Interface elements

| № | Element | Description |
|---|---------|-------------|
| **1** | **Export** | Export ENCs to a file for further use, in accordance with **Publication IHO S 63** |
| **2** | **Edition** | Cell edition type:<br>• **Official ENCs** — charts from official hydrographic offices<br>• **Unofficial ENCs** — charts from commercial publishers |
| **3** | **Permit** | License validity period for ENC cell use<br>The license expiration date is displayed |
| **4** | **For...** | ENC cell currency for the voyage schedule period<br>Verification of update compliance for the entire voyage period |
| **5** | **Cell frame** | Highlighting of ENC cell boundaries on the overview chart<br>Allows visual assessment of route chart coverage<br>![Cell frame on map](images/enc-cell-frame.png) |
| **6** | **Set** | Name of the ENC set to which the cell belongs<br>The list may include cells from different sets |
| **7** | **Cell centering** | Center the selected cell in the main ECDIS window<br>For quick navigation to the chart area |
| **8** | **Back** | Return to the previous window<br>Exit the ENC by route viewing mode |

The table contains a list of ENCs through which the route passes. ENC currency is checked for the specified date range — from the voyage start date to the end date.

### Exporting the ENC list

The list can be exported from ECDIS in **CSV** format to an external medium.

   | Menu path |
   |-----------|
   | {{ menu }} → {{ menu_routes }} → Select Route → **Charts by Route** → **Export** |

**Upon successful export**, the message **"Export completed successfully"** will be displayed

**Export verification:**
- View the export file on any computer with a corresponding port
- A file with a name in the format **`Encs_name_date.csv`** will be written to the medium
  - `name` — route name
  - `date` — export date

```{tip}
The exported file contains complete information about the required ENCs and can be used for coordination with shore-based hydrographic offices during voyage preparation.
```

### ENC statuses

```{important}
Before starting the voyage, be sure to check the currency of all ENCs for the entire voyage period. Outdated charts may contain outdated navigational information and pose a safety threat.
```

**Possible ENC statuses:**
- **Current** — the chart contains all necessary updates for the voyage period
- **Update required** — the chart needs to be updated before the start of the voyage
- **License expiring** — the license expires during the voyage period
- **Missing** — the chart is not installed in the system

### ENC edition types

**Official ENCs:**
- Published by national hydrographic offices
- Comply with IHO S-57 standards
- Are an adequate replacement for official paper nautical charts
- Updated regularly

**Unofficial ENCs:**
- Published by commercial cartographic companies
- May contain additional information
- Do not have official status
- May be used as a supplement to official charts, for areas without official coverage

```{note}
For areas with incomplete official ENC coverage, the use of unofficial charts as backup cartographic support is permitted.
```

### Route coverage check

When analyzing the ENC list, pay attention to:

1. **Coverage continuity:**
   - The entire route must be covered by ENC cells
   - Gaps in chart coverage are unacceptable

2. **Chart scales:**
   - Availability of cells at the required scales for all sections
   - Large-scale charts for port approaches and narrow channels

3. **Currency:**
   - All ENC cells must be current
   - License validity must not expire during the voyage period

```{warning}
Navigating in areas without chart coverage or with outdated charts poses a serious threat to navigational safety and may be a precursor to a navigational incident.
```

### Integration with voyage planning

The ENC by route report is used for:
- **Quick verification** of the ship's ENC collection by **Port State Control**
- **Route adjustment** in case of insufficient chart coverage
- **Planning chart requests** to shore-based hydrographic offices
- **Assessing vessel readiness** for the voyage
- **Documenting** the ENC collection status for port authorities
