RTL_ALT_TYPE is above terrain waiting for terrain

This issue occurs when terrain data is not loaded onto the vehicle, the sd card is corrupt, or the terrain data files are too large

If this error occurs you can download the correct data from here

If this does not solve the issue,

  1. Take SD card out of UAV

  2. Reformat to Fat32

  3. Reinsert into UAV

  4. Take SD card back out of UAV

  5. Put terrain data on SD card

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