The gimbal's point-of-interest lock changed state

InformationRangefinder, optical flow, camera, OSD and other devices4.7 only

What ArduPilot says:

POI: Cleared
POI: Revert mode,target saved
POI: tracking
POI: tracking r=N.N p=N.N y=N.N

The POI lock switch (RCn_OPTION 186, new in 4.7) was moved. “POI: tracking r=… p=… y=…”: the gimbal's angles (roll, pitch, yaw in degrees) at the moment of locking; the spot under the camera is now being worked out. “POI: tracking”: a spot was already stored, and the gimbal points at it again. “POI: Revert mode,target saved”: the gimbal went back to its earlier mode, and the spot is kept. “POI: Cleared”: the stored spot was forgotten.

The code that sends it

POI: Cleared

libraries/AP_Mount/AP_Mount_Backend.cpp AP_Mount_Backend::clear_poi_lock() · Open in ArduPilot Copter-4.7.1

POI: Revert mode,target saved

libraries/AP_Mount/AP_Mount_Backend.cpp AP_Mount_Backend::suspend_poi_lock() · Open in ArduPilot Copter-4.7.1

POI: tracking

libraries/AP_Mount/AP_Mount_Backend.cpp AP_Mount_Backend::set_poi_lock() · Open in ArduPilot Copter-4.7.1

POI: tracking r=N.N p=N.N y=N.N

libraries/AP_Mount/AP_Mount_Backend.cpp AP_Mount_Backend::set_poi_lock() · Open in ArduPilot Copter-4.7.1