Question 1

How to display Laylines ?

Francis · Accepted Answer

Laylines are automatically displayed when you have activated a POI using the ‘Go to’ function and you need to tack or jibe to reach your target, upwind or downwind.

By convention, the green layline is the starboard tack, and the red layline is the port tack.

You can activate the instruments corresponding to the layline data:

Distance (length of the) layline
Time (duration of the) layline

Question 2

How to display Laylines ?

Francis · Accepted Answer

Laylines are automatically displayed when you have activated a POI using the ‘Go to’ function and you need to tack or jibe to reach your target, upwind or downwind.

By convention, the green layline is the starboard tack, and the red layline is the port tack.

You can activate the instruments corresponding to the layline data:

Distance (length of the) layline
Time (duration of the) layline

Question 3

How do I completely uninstall the app on macOS?

Henri · Accepted Answer

Uninstall the application by moving it to the Trash
Open Finder
- Go to the directory /Users/[user]
- Show hidden files and folders in this directory by pressing "Command" + "Shift" + "." (period) simultaneously.

- Delete the following directory:
/Users/[user]/Library/Containers/eSail4VR
Replace [user] with your Mac username.

You can also use the CleanMyMac application.

Question 4

How do you interpret a routing?

Henri · Accepted Answer

Once the routing is computed, the optimal route is shown on the chart together with the isochrone curves. These curves represent the positions that can be reached at successive time intervals from the start point.

You can move the boat along the route in two ways:

by dragging the timeline,
or by tapping directly on the routing at the desired location.

At each intersection between the optimal route and an isochrone, a wind barb is drawn. It shows the wind speed and direction at the time the boat reaches that position. If you route with current, a current arrow will also be drawn

Routing list

Open the lists panel (via the ☰ button at the top left of the screen) and select the Routing tab. This tab lists all computed routings.

For each routing you’ll see:

The routing name, shown in a specific color (matching the route color on the chart).
Departure and arrival times.
The total duration of the routing.
The route length and the increase vs. great-circle distance (i.e., the shortest path between start and finish).
The calculation timestamp.
A round button to open the routing table.
An eye icon to show/hide the routing on the map.

The routing table and its tabs

Click the orange button to open the routing table. It contains four tabs, each presenting a different facet of the computation.

Routing tab
- Shows, for each isochrone, the boat parameters at that time: speed, wind angle, position, etc.
Statistics tab
- Displays the distribution of speeds and wind angles encountered during the routing.
- Helps you see whether you’ll sail mostly upwind or downwind, and assess the average wind strength.
AI Briefing tab
- Automatically generates a weather briefing using our AI.
- When you click Generate AI Briefing, the routing data are sent to our AI server.
- The AI returns a complete briefing with four sections:
  - 1. General situation & evolution
  - 2. Forecast along the route
  - 3. Routing analysis
  - 4. Weather risks
  - It also includes links to synoptic charts and to the Météo-France bulletin.
- The AI Briefing is a Premium feature. Generation uses AI servers billed per use. Each Premium subscriber has a credit of 300 AI briefings per year, calculated on a rolling 365-day window.
- ⚠️ Warning: this briefing is generated automatically by artificial intelligence. It may contain inaccuracies or errors. Always consult official forecasts and exercise sound judgment and good seamanship in your decisions. The skipper remains solely responsible for the safety of the vessel and crew.
Input tab
- Summarizes all parameters used for the computation: weather models, coefficients, constraints, and departure settings.

How to display Laylines ?

How to display Laylines ?

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How to display Laylines ?

How to display Laylines ?

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