When I see a safe or terminal that I can't open or hack, I have to jot down its location on a notebook so I will remember later to return to it when my skill meets the requirement. Does anyone wish we could do that in-game? Is there a mod that lets us mark the locations of unopened safes and unhacked terminals? Any such mod for FO3 and NV, for that matter? Vault 111 has a master-locked container with what seems to be an advanced weapon. After 100+ hours of play I'll probably forget about it if I don't write it down.