Q: Why are there global models and regional models?

Global models (such as GFS or ECMWF) cover the entire planet. They are essential for long crossings and long-term forecasts (up to 10–15 days), but their resolution remains limited (20 to 50 km). They are used to get an overall view of the weather and for long-distance passages. Regional models focus on a specific area (France, Europe, the Mediterranean…). Their coverage is smaller, but their resolution is much finer (2 to 10 km), allowing for better anticipation of local effects such as thermal breezes, thunderstorms, terrain, and coastal winds. In return, they generally only extend 2 to 3 days into the future. They are used for day trips or short cruises.

Question 1

How to display tides on the chart?

Francis · Accepted Answer

By default, a tide gauge is displayed on the cartography for each referenced station.

The display can be disabled by opening the layers menu and unchecking the Tide box. The gauges currently display dynamically:

Flow in green
Ebb in red

Tapping on each gauge opens a tide graph showing the tide curve and the current water level, represented by the vertical timeline.

The graph is topped by a table showing the times, water heights and tidal coefficients for the day.

Tapping/clicking on the date above the table opens the calendar, allowing you to select another day/month.

The height threshold can be used to determine:

What the water level will be at a given time
What time a given threshold will be reached

Question 2

How to display tides on the chart?

Francis · Accepted Answer

By default, a tide gauge is displayed on the cartography for each referenced station.

The display can be disabled by opening the layers menu and unchecking the Tide box. The gauges currently display dynamically:

Flow in green
Ebb in red

Tapping on each gauge opens a tide graph showing the tide curve and the current water level, represented by the vertical timeline.

The graph is topped by a table showing the times, water heights and tidal coefficients for the day.

Tapping/clicking on the date above the table opens the calendar, allowing you to select another day/month.

The height threshold can be used to determine:

What the water level will be at a given time
What time a given threshold will be reached

Question 3

How do I create a route?

Henri · Accepted Answer

On a tablet or smartphone

Move the chart under the target displayed on the screen, zooming in for precise positioning, then tap the + icon in the lower right corner. From the menu, select “Create a route”.

Tap successively to place the desired points. You can drag them with your finger to move them if needed. Zoom in for more precise placement. Once finished, select the “Finish” button at the top of the screen. Enter a name for your route and confirm saving by tapping “OK”.

On a Mac or PC

Click to create successive points, zooming in for better accuracy. You can also drag the points to adjust their position if needed. Click the “Finish” button at the top of the screen. Enter a name for your route and confirm saving by clicking “OK”. Alternatively, you can proceed the same way as on a tablet or smartphone.

In any case, you can also create a route by tapping or clicking an existing POI (waypoint) and selecting “Create a route” from the popup menu starting from that point.

Saving

Routes are saved in the route list, located in the left sidebar of the screen, accessible via the ≡ symbol in the top-left toolbar.

Tap the eye icon next to each route to toggle its display on or off. Use the checkboxes to select routes for export or deletion.

Question 4

Why are there global models and regional models?

Henri · Accepted Answer

Global models (such as GFS or ECMWF) cover the entire planet. They are essential for long crossings and long-term forecasts (up to 10–15 days), but their resolution remains limited (20 to 50 km). They are used to get an overall view of the weather and for long-distance passages.

Regional models focus on a specific area (France, Europe, the Mediterranean…). Their coverage is smaller, but their resolution is much finer (2 to 10 km), allowing for better anticipation of local effects such as thermal breezes, thunderstorms, terrain, and coastal winds. In return, they generally only extend 2 to 3 days into the future. They are used for day trips or short cruises.

How to display tides on the chart?

How to display tides on the chart?

Contact

Politique de confidentialité

Conditions Générales d’utilisation

How to display tides on the chart?

How to display tides on the chart?

Related Posts

How do I create a route?

Why are there global models and regional models?

Comment afficher les marées sur la carte ?

Contact

Politique de confidentialité

Conditions Générales d’utilisation