INSTRUMENTS
LEISURE - TREKKING - ORIENTATION
Variometer
Variometers are a kind of altimeter that give information on climbing speed and
falling speed, flight altitude, positive or negative differences of altitude, maximum
altitude and flight duration. These instruments are used for paragliding,
hang-gliding and balloon flights.
No more available
See skywatch
Geos
Encyclopedia Wikipedia,
Paragliding
Oders Through
French