40kn Sail RouterWhen it doesn’t work
What to check when a route looks wrong, or your routes or forecasts have gone.
When a run fails or stops short, the line above Run Router says why and what to do. This page is for the problems the app can’t tell you about.
Something looks wrong
The route seems boxed in
Switch off Adaptive routing area in Routing setup and run again. If the route changes noticeably, leave it off for that passage.
The route crosses shallows or a small island
The router knows only a simplified coastline, with no depths, marks or small islands. This is expected, and it’s why you must check every route on a chart. Add a keep-out line and route again.
The route tacks too often
The default tack penalty is 0, so tacking costs nothing. Set a penalty.
The arrival time is too optimistic
Lower Efficiency in Boat setup. Most boats don’t sail their polar. Also check the forecast: a route is only as good as the wind it was computed in.
A layer is empty, or the readout shows a dash
That forecast has no data for this place or time, or doesn’t offer that parameter. Waves, gusts and the other layers can end sooner than the wind. This is deliberate: the app shows nothing rather than a value it doesn’t have.
My routes or forecasts have disappeared
If you used the app in a browser tab, the browser may have deleted them. See Install the app. Also check that you’re using the same browser and device, and opening the app from its icon rather than a tab.
Not enough storage
Not enough storage: needs ≈ …
The download doesn’t fit on this device. Choose a smaller area, fewer days, fewer data sets or a reduced resolution, or delete old copies in the Offline tab.
Still stuck?
Get in touch. Tell us the device and browser, what you tried and the exact words on the status line. For a routing problem, the route’s Report is the most useful thing you can send.