Aircraft
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2016 DJI. All Rights Reserved.
13
Phantom 4
User Manual
Return-to-Home (RTH)
The Return-to-Home (RTH) function brings the aircraft back to the last recorded Home Point. There are
three types of RTH procedures: 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 was launched. The GPS signal
strength is indicated by the GPS icon (
). The aircraft status
indicator will blink rapidly when the home point is recorded.
Failsafe RTH
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 Return-
to-Home process may be interrupted and the operator may regain control of the aircraft if the remote
controller signal connection is re-established.
Failsafe Illustration
Height over HP<=20m
5 RTH (adjustable altitude)
Fast Blinking Yellow
1 Record Home Point
Blinking Green
3 Remote Controller Signal Lost
Fast Blinking Yellow
2 Confirming 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>20m
Elevate to 20m
20m
>3S
×
×
×
×
Aircraft cannot return to the Home Point when GPS signal is weak ( [
] displays grey) or
unavailable.
Aircraft automatically descends and lands if RTH is triggered when the aircraft flies within a 20
meters (65 feet) radius of the Home Point. Aircraft will stop ascending and immediately return to
the Home Point if you move the throttle stick if the aircraft reaches 20 meters (65 feet) altitudes
or beyond during Failsafe.
The aircraft cannot avoid obstruction during the Failsafe RTH, therefore, it is important to set an
suitable Failsafe altitude before each flight. Launch the DJI GO app and enter “Camera” and
select “MODE > Advanced Settings > Failsafe mode” to set the Failsafe altitude.
User cannot control the aircraft while the aircraft is ascending to its failsafe altitude. However,
user can press RTH button once to exit ascending and regain control.
