Once you are following a route, the Course tracking instrument answers the questions a navigator gets asked out loud: how far now? what do we steer? what time do we get there?
Add it like any other instrument: it docks in the instrument bar or floats on the chart.
What it shows
One row per remaining leg, carrying, depending on how wide the tile is:
- the mark ahead, and the one you are leaving;
- the side to leave it, if one was specified;
- the distance;
- the ground course and the surface course — the one to steer, corrected for the current;
- the estimated true and apparent wind angles;
- the sail best suited, if your polar carries a Sailchart;
- the leg's duration and the time at the mark.
Legs are chained in time: each is computed with the weather it will meet, at the hour the boat will enter it. A long course is therefore not evaluated with today's wind.
Which wind is used?
In the instrument settings (long press or right click), the Wind source selector offers:
- Measured — the wind from your instruments, the default;
- Avg 10 min — the mean of the last ten minutes, steadier for deciding a sail or a heading;
- Forecast — the GRIB, greyed out when no file covers your position;
- Forced — a strength and direction you impose, to see what a shift would do.
The current always comes from the GRIB, since no instrument measures it ahead of the bow.
On a narrow screen each leg becomes a two-line card rather than being truncated. Text size is also set in the instrument settings.