User`s manual

10 INFOBOX REFERENCE
Next L/D
The required glide ratio to reach the next waypoint, given by the distance
to next waypoint divided by the height required to arrive at the safety arrival
altitude. Negative values indicate a climb is necessary to reach the waypoint.
If the height required is close to zero, the displayed value is ’–’.
L/D vario
Instantaneous glide ratio, given by the indicated airspeed divided by the total
energy vertical speed, when connected to an intelligent variometer. Negative
values indicate climbing cruise. If the total energy vario speed is close to zero,
the displayed value is ’–’.
10.4 Variometer
Thermal last 30 sec
A 30 second rolling average climb rate based on the reported GPS altitude, or
vario if available.
Last Thermal Average
Total altitude gain/loss in the last thermal divided by the time spent circling.
Last Thermal Gain
Total altitude gain/loss in the last thermal.
Last Thermal Time
Time spent circling in the last thermal.
Thermal Average
Altitude gained/lost in the current thermal, divided by time spent thermaling.
Thermal Gain
The altitude gained/lost in the current thermal.
XCSoar Manual (Altair version) • XCSoar-A-EN 86