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Message & Error Explainer

What an ArduPilot message means and what to do about it

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The mission jumped to its landing approach or its way back

InformationMissions, fence, rally points, terrain

What ArduPilot says:

A mission can hold a landing approach marked by a DO_LAND_START item and a way back marked by DO_RETURN_PATH_START. “Landing sequence start” means the mission has jumped to the DO_LAND_START nearest to the aircraft and will now fly the landing. “Return path started” means it has joined the mission at the closest point of the route that follows a DO_RETURN_PATH_START. “… active” means the aircraft was asked to join the return path while already flying the landing or the return path, and stays on it. “Landing abort sequence start” means a landing was aborted and the mission has jumped to the nearest DO_GO_AROUND item.

On a copter this is the Auto RTL mode, started by a switch, a ground station command or a failsafe set to it.

Parameters to look at

ParameterWhat it is
MIS_TOTALTotal mission commands
The code that sends it

Return path started

libraries/AP_Mission/AP_Mission.cpp AP_Mission::jump_to_closest_mission_leg() · Open in ArduPilot Copter-4.7.1

Landing sequence active

libraries/AP_Mission/AP_Mission.cpp AP_Mission::jump_to_closest_mission_leg() · Open in ArduPilot Copter-4.7.1

Return path active

libraries/AP_Mission/AP_Mission.cpp AP_Mission::jump_to_closest_mission_leg() · Open in ArduPilot Copter-4.7.1

Landing abort sequence start

libraries/AP_Mission/AP_Mission.cpp AP_Mission::jump_to_abort_landing_sequence() · Open in ArduPilot Copter-4.7.1

And 1 more messages, sent from the same places.

Written here for Copter 4.6. In the tool you choose your vehicle and version, see your own parameter values beside the ones named here, and drop a flight log to have every message in it explained.

Open it in the Message & Error Explainer