[FReepaholic]

So...if they were going to be SEALED inside, how would they monitor anything?? Radio transmissions? And will radio signals penetrate solid rock?

[Stoat]

So...if they were going to be SEALED inside, how would they monitor anything?? Radio transmissions? And will radio signals penetrate solid rock?

I'm no radio expert, but I believe longwave transmissions will penetrate rock.  Also, lines could be laid beforehand to external disguised antennae or to remote repeaters.  "Sealed" in this context can also be taken too far in that they would obviously need to be supplied with air at least, assuming adequate food and water stockpiles inside the facility.

[Sax]

So...if they were going to be SEALED inside, how would they monitor anything?? Radio transmissions? And will radio signals penetrate solid rock?

I'm certain the mission would planned out better than that, but your post does raise a funny image!

DAY 83: It's still dark in here. Using the laterns sparingly to avoid further fouling of the air. Thought we heard several diesel engines pass by above us somewhere, but hard to be sure. Still uncertain if any of our transmissions are being received. End Report.