Q: What is a GRIB file?

A GRIB file (for GRIdded Binary ) is a standard file format used by meteorological services to distribute numerical weather forecasts. It contains the raw data generated by weather models (wind, pressure, rain, waves, currents, etc.) organized on a grid covering a geographic area. Why use this format? It is compact : GRIB files are compressed and therefore quick to download, even with limited internet connections. It is standardized : most navigation and weather applications can read GRIB files. There are two formats — grib1 and grib2. NavimetriX uses the newer grib2 format. It is flexible : you can choose the area, resolution, and parameters (wind, waves, currents, etc.) you wish to download. What does a GRIB file contain? Depending on the selected model, a GRIB file may include: Wind (direction, speed, gusts) Atmospheric pressure Temperature, humidity, precipitation Sea state (swell, waves) Marine, oceanic, and tidal currents What is it used for in navigation? A GRIB file allows you to visualize the evolution of the weather over a given area directly within your navigation software or weather app.

Question 1

How do I navigate towards a POI or Waypoint?

Henri · Accepted Answer

Navigate to a POI (Waypoint)

To activate navigation toward a POI (or Waypoint):

💻 On a computer: right-click the waypoint you previously saved, then select the Go to option. Confirm that you want to navigate to this waypoint.

📱 On mobile or tablet: tap the POI, then select Go to and confirm the navigation.

Once the POI is selected, a dashed black line is drawn between your boat and the POI, showing the direct route.

To stop navigation, select the same POI again, then choose Stop Goto from the menu.

Question 2

How do I navigate towards a POI or Waypoint?

Henri · Accepted Answer

Navigate to a POI (Waypoint)

To activate navigation toward a POI (or Waypoint):

💻 On a computer: right-click the waypoint you previously saved, then select the Go to option. Confirm that you want to navigate to this waypoint.

📱 On mobile or tablet: tap the POI, then select Go to and confirm the navigation.

Once the POI is selected, a dashed black line is drawn between your boat and the POI, showing the direct route.

To stop navigation, select the same POI again, then choose Stop Goto from the menu.

Question 3

What is a GRIB file?

Henri · Accepted Answer

A GRIB file (for GRIdded Binary) is a standard file format used by meteorological services to distribute numerical weather forecasts.

It contains the raw data generated by weather models (wind, pressure, rain, waves, currents, etc.) organized on a grid covering a geographic area.

Why use this format?

It is compact: GRIB files are compressed and therefore quick to download, even with limited internet connections.
It is standardized: most navigation and weather applications can read GRIB files. There are two formats — grib1 and grib2. NavimetriX uses the newer grib2 format.
It is flexible: you can choose the area, resolution, and parameters (wind, waves, currents, etc.) you wish to download.

What does a GRIB file contain?

Depending on the selected model, a GRIB file may include:

Wind (direction, speed, gusts)
Atmospheric pressure
Temperature, humidity, precipitation
Sea state (swell, waves)
Marine, oceanic, and tidal currents

What is it used for in navigation?

A GRIB file allows you to visualize the evolution of the weather over a given area directly within your navigation software or weather app.

Question 4

How do you calculate a routing with a pivot point?

Henri · Accepted Answer

A pivot point is a location you want the routing to pass through.
It’s a very useful way to quickly compare routing options.
For example, in this case we’ll check whether it’s better to pass inside or outside the Traffic Separation Scheme (TSS) off Cape Finisterre — a very common situation when sailing from the French Atlantic coast toward Madeira or the Canary Islands.

To perform a routing with a pivot point, first make sure the isochrones of the desired routing are displayed on the map.

Show or hide isochrones

Open the Routing list via the hamburger menu (☰).
Click on the routing whose isochrones you want to display.
A small orange bar appears to the left of the selected routing: the isochrones are now visible on the map.
To hide them, click again on the same routing.

Create a routing with a pivot point on a phone

Display the isochrones of the existing routing.
Move the map — a yellow route automatically appears toward the center of the screen. It represents the optimal route to the currently selected point on an isochrone.
If you want to force the route to pass through that point, press the + button and select “Route from this point” in the menu.
A new routing is then computed starting from the selected pivot point.

Create a routing with a pivot point on a computer

Display the isochrones of the existing routing.
Move the mouse — a yellow route automatically appears toward the cursor position. It represents the optimal route to the currently selected point on an isochrone.
If you want to force the route through that point, right-click on it and choose “Route from this point” from the context menu.
A new routing is then computed starting from the selected pivot point.

How do I navigate towards a POI or Waypoint?

How do I navigate towards a POI or Waypoint?

Navigate to a POI (Waypoint)

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How do I navigate towards a POI or Waypoint?

How do I navigate towards a POI or Waypoint?

Navigate to a POI (Waypoint)

Related Posts

What is a GRIB file?

How do you calculate a routing with a pivot point?

How do I display my phone’s GPS data?

Do you support USB GPS devices?

Contact

Politique de confidentialité

Conditions Générales d’utilisation