Compass C-PILOT EVO User Manual page 57

C-Pilot PRO
True and indicated airspeeds: show the true and indicated airspeeds (measured by the

optional external sensor C-Probe). Please refer to the user manual of the C-Probe for further
details.
Air-referenced glide ratio: shows the glide ratio calculated taking into account the

horizontal speed (measured by the optional external sensor C-Probe) and on the vertical
speed measured by the variometer.
Flight level: the flight level is defined consistently with its use in aviation. "FL050", for

example, indicates an altitude of 5000 feet, calculated from the atmospheric pressure
measured by the internal barometer and referred to the standard atmosphere. It might be
useful for example if in your flight area it is forbidden to fly above a given Flight level.
Altitude gain in thermal: this is a partial altimeter that automatically nulls when you turn at

least 270° while climbing. It is very useful to estimate your gain or height loss while centring
the thermal. It nulls again when you stop climbing for a time longer than the "autozoom
persistence" in the "map" page (see page 59).
Time from GPS: shows the time given by the GPS corrected by the offset set in the

configuration page (see page 15).
Analog vario: your vertical speed is displayed graphically by a solid bar. It is coloured in

cyan for velocities smaller than the past average climb velocity, red for values that are larger
than twice the average velocity, and with intermediate colour gradations in between. The
response time of the analog variometer can be set in the configuration page (page 16). The
scale is not fixed: it is shifted depending on the current vertical speed to optimise the screen
usage. A double horizontal line indicates the past average climb speed. This value is
used by the device as the McCready parameter. Take note that, at the same time, the
track showed in the thermal page will assume the same colors: cyan for vertical speed
lower than the past average climb speed and red for values that are larger than twice
the average climb velocity.
Vertical speed: it is the digital indicator of the vertical velocity. Its response time can be set

in the configuration page (page 16).
Netto vario: indicates the vertical speed of the airmass. This value is calculated taking into

account the sink rate of your wing, determined from the polar curve that you are using, and
the airspeed measured by the optional external sensor C-Probe.
Average climb velocity: digital indicator of the average climb speed during the last 30

minutes. It is used by C-Pilot PRO as the McCready parameter and used to estimate arrival
heights at the next waypoints.
Ground speed: ground speed measured by the GPS. The symbols beside the numeric field

indicate whether you have to accelerate or decelerate to fly at the predicted speed-to-fly
according to the McCready theory, taking into account the wind. Two upward-pointing
User manual
53
Compass s.r.l.