Several occupied craft fell thru the surface of the Mun.

[KingWolfWorm]

They are all intact, resting about 20m beneath the surface. But I cannot access any controls or EVA (I wouldnt want to anyway, seems like a bad idea).

They were fine a little while back. How can I get them back above the surface?

[Windspren]

Did they fall out of a rover? This is a known bug. One way is to just use Hyperedit to get them to orbit. You can the. Use Hyperedit's landing feature to re-land them at where you were.

[archnem]

This is a bug that happened to me as well. I'm pretty sure it's actually the camera that is below the surface, not the craft itself. It fixed itself in my particular case when I changed the terrain detail from default to high.