The pattern on the rise is of obscure aviation acronyms! CONUS:
The conus medullaris is the terminal end of the spinal cord.
Acronym finder has
CONUS Continental United States
CONUS Contiguous United States
CONUS Conterminous United States
I guess it's the second. Bit like SOCAL (I like that one). This is an international bulletin board and those are a little obscure for many here.
Are you implying only domestic US pilots get tired?