PNI Sensoro Alpha+, Руководство по эксплуатации

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12
Calibration should be performed on a level surface. The
size of the circles or the direction your vehicle is pointing
when beginning or ending the circles does not matter.
The circles do not need to be perfect circles but must be
completed in the same direction. It is also important that
each circle takes a minimum of 20 seconds, but less than
one minute to complete.
Compass display
The compass displays eight cardinal points (N, NE, E, SE,
S, SW, W, NW) and the corresponding numeric heading in
five-degree increments (340°, 345°, etc.).
COMPASS OPERATION