Home position not reset on 3D lock or arming position, (AC 2.9.1) · Issue #67 · ArduPilot/ardupilot · GitHub
APM 2.8 MP 1.3.37 firmware version 3.2.1 .. problem is yellow LED blinking and red LED double blingking.. need 3D fix and no gps ? now how i solve this? - Help - DroneTrest
![Cannot Arm in any GPS mode: 16 sats, .7 HDOP 3D Fix = Error: No 3D Fix - Copter 4.0 - ArduPilot Discourse Cannot Arm in any GPS mode: 16 sats, .7 HDOP 3D Fix = Error: No 3D Fix - Copter 4.0 - ArduPilot Discourse](https://discuss.ardupilot.org/uploads/default/original/3X/b/4/b42850d0d3144d67af91ad82c1f455cda9b1f6e4.jpeg)