That sign you found is coded too. It is read in a different way than we commonly do. The reason why i can read the depth in every digging operation by just staring at the compiled photos of rocks they found is this secret code meaning. That is highly classified and i never seen anyone here who can read that even in those thousands of codes found on internet, nowhere you can find it. Makes me think those codes are just disinformation scattered by someone with a purpose.
