Verbal "No Terrain Data" warning at remote flying site

[joe-stroup]

Environment: latest stable version of Ardupilot Copter, RadioMaster TX16S, Crossfire

A few days ago while conducting Autotune flights, Yaapu gave repeated verbal warnings about "No Terrain Data."

I'd never heard or seen that warning before - and could not find it in the logs. I have the TERRAIN_ENABLE parameter set to "1" - but there was no internet access at this flying site to get data.

I'm guessing that I can defeat this warning by setting TERRAIN_ENABLE to "0" - but it would be preferable to leave it at "1" so terrain data will be loaded when it's available.

I don't suspect that Yaapu has the ability to defeat this one specific warning. As a compromise, perhaps it could be issued only once instead of repeated about every 30 seconds.

I'd appreciate any comments or suggestions. Thank you!