Where is he now? I would recommend he contact the nearest Marine unit and check in with them.
I looked at the USMC website and there is NOTHING about checkin procedures for people caught in this mess. 4th MAW/MARDIV websites are down.
Tell him to check into the watch at the nearest Marine Corps post or station...
They will direct from there...
Well if the Marines are like the Army you check in with your nearest recruiter if you cant connect to your home unit.