P4 Multispectral User Manual
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2019 DJI All Rights Reserved.
17
Aircraft cannot return to the Home Point when GNSS signal is weak
( [ ] displays grey) or the module is unavailable.
If you move the throttle stick after the aircraft rises above 65 feet (20
meters) but below the pre-set Failsafe RTH altitude, the aircraft will
stop ascending and immediately return to the Home Point.
Obstacle Avoidance During RTH
Aircraft can now sense and actively attempt to avoid obstacles during RTH, provided that the
lighting conditions are adequate for the Forward Vision System. Upon detecting an obstacle, the
aircraft will act as follows:
1. The aircraft will use the primary camera to identify obstacles as far as 984 feet (300 meters) in
front, allowing it to plan a safe route home.
2. The aircraft decelerates when an obstacle is sensed at 49 feet (15 meters) ahead.
3. The aircraft stops and hovers then starts ascending vertically to avoid the obstacle. Eventually,
the aircraft will stop climbing when it is at least 16 feet (5 meters) above the detected obstacle.
4. Failsafe RTH procedure resumes, the aircraft will continue flying to the Home Point at the
current altitude.
The Obstacle Sensing function is disabled during RTH descent. Operate with care.
To ensure the aircraft returns home forwards, it cannot rotate during RTH while the Forward Vision
System is enabled.
The aircraft cannot avoid obstacles above, beside, or behind the aircraft.
300 meters
5 meters
15 meters
Landing Protection Function
Landing Protection will activate during auto landing.
1. Landing Protection determines whether the ground is suitable for landing. If so, the aircraft will
land gently.
2. If Landing Protection determines that the ground is not suitable for landing, the aircraft will
hover and wait for pilot confirmation. The aircraft will hover if it detects the ground is not
appropriate for landing even with a critically low battery warning. Only when the battery level
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General
Weight and Dimensions
