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Aircraft
Phantom 4 Pro / Pro+ Series User Manual
©
2020 DJI All Rights Reserved.
15
Return-to-Home (RTH)
Return-to-Home (RTH) function brings the aircraft back to the last recorded Home Point. There are
three types of RTH: Smart RTH, Low Battery RTH, and Failsafe RTH. This section describes these
three scenarios in detail.
GPS
Description
Home Point
If a strong GPS signal was acquired before takeoff, the Home Point is the
location from which the aircraft launched. The GPS signal strength is indicated
by the GPS icon ( Less than 4 bars is considered a weak GPS signal). The
aircraft status indicator will blink rapidly when the home point is recorded.
Failsafe RTH
The Forward Vision System allows the aircraft to create a real-time map of its ight route as it ies. If the
Home Point was successfully recorded and the compass is functioning normally, Failsafe RTH will be
automatically activated if the remote controller signal is lost for more than three seconds. The aircraft
will plan its return route and retrace its original ight route home. The aircraft will hover for 10 seconds
at its current location. When it regains signal connection it will wait for pilot commands. The Return-to-
Home process may be interrupted and the pilot given control of the aircraft if the remote controller signal
connection is re-established.
Failsafe Illustration
Aircraft cannot return to the Home Point when GPS signal is weak ( [ ] displays grey) or
unavailable.
When the RTH altitude is set to more than 65 ft (20 m) and the aircraft is ascending between 65
ft (20 m) and the preset RTH altitude, the aircraft will stop ascending and immediately return to
the Home Point if you push the throttle stick. The aircraft automatically descends and lands if
RTH is triggered when the aircraft ies within a 65ft (20m) radius of the Home Point.
The aircraft cannot avoid obstruction during Failsafe RTH if Forward Vision System is disabled.
It is important to set a suitable Failsafe altitude before each ight. Launch the DJI GO 4 app, tap
GO FLY and tap to set the Failsafe Altitude.
User cannot control the aircraft while the aircraft is ascending to 65 feet (20 meters) from the
current altitude. However, user can press RTH button once to exit ascending and regain control.
The aircraft can sense and avoid obstacles when the Forward Vision System is enabled and
lighting conditions are sufcient. The aircraft will automatically climb up to avoid obstacles and
descend slowly as it returns to the home point. To ensure the aircraft returns home forwards, it
cannot rotate or y left and right during RTH while the Forward Vision System is enabled.
5
RTH (adjustable altitude)
Fast Blinking Yellow
Height over HP<=Failsafe Altitude
1 Record Home Point
Blinking Green
3 Remote Controller Signal Lost
Fast Blinking Yellow
2 Conrming Home Point
Blinking Green
6 Landing (after hovering for 5 secs)
Fast Blinking Yellow
4
Signal Lost Lasts (after 3 sec.)
Fast Blinking Yellow
Height over HP>Failsafe Altitude
Elevate to Failsafe Altitude
Failsafe Altitude
×
×
×
>3S
×
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