Flight Restrictions; Preflight Checklist; Calibrating The Compass - Zerotech DOBBY User Manual

by an ordinary fluorescent lamp.
3. During fast flight at low levels (0.5m or less), the optic flow and ultrasonic positioning system may not
work.
For more requirements for indoor flight, please refer to "Optic Flow and Ultrasonic Positioning" on page 6.

Flight Restrictions


Maximum ascent height under the GPS positioning: 50m.

Maximum ascent height under the optic flow and ultrasonic positioning: 3m.

Maximum control distance: 100m (in open air free of interference).
No-Fly Zone
Please do not fly in areas where flying is illegal or restricted.
According to regulations, the surrounding areas of airports are strictly no fly zones.
In no-fly zones, DOBBY will not be able to fly while using the GPS positioning. The Aircraft Status
Indicator will be slow yellow flashing. The app will prompt the no-fly zone warning

Preflight Checklist

Please check the following items before flying. You can take off only if all of the items are OK:
1. Check that DOBBY and your mobile device have enough power;
2. Check that the Arms are fully expanded;
3. Check that the propeller blades and other parts of the aircraft aren't loose or damaged;
4. Check that the lenses on the optic flow camera and the front facing camera are clean.

Calibrating the Compass


You're required to calibrate your compass before the first flight, or the system may work
abnormally which leads to unsafe flight.

The compass is easily interfered by other electronic devices. This can lead to data
abnormalities even unsafe flight. Regular calibrations ensure that the compass is
working at its best.
ZEROTECH (Beijing) Intelligence Technology Co., Ltd.
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