Syride SYS’Evolution User Manual page 34

Heading : is your current instrument's magnetic orientation. Note that this indicator is corrected by the
magnetic declination, which depends on your current position. As a consequence, this item displays
the true heading instead of magnetic heading.
Course : is your current course. Without wind, the course equals the heading.
Drift angle : is the difference between your course and your heading. Drift angle = Course – Heading.
Temperature : gives the internal temperature of the instrument.
Back to previous thermal : the SYS'Evolution always keep track of the previous thermal.
Fly in the direction the arrow is pointing to go back to the previous thermal.
Wind - graphical : in order to get the speed and direction of
the wind, fly a 360° turn at constant speed and glide ratio,
within 10 to 30 seconds. The instrument will compute the
drift and will be able to display the wind direction and speed.
The wind direction represented by the arrow is dependent
on your current course.
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