Sounds kind of risky to me. Recently a teenager around here met a guy on line, brought her friend with her to meet him & they were both abducted & raped! Then again, from an adult standpoint, I guess it is not much different than going home with someone you just met in a bar.
Here is the mapquest link for the area of the Naval Station - Norfolk, VA. If you find out her name, you can use the Map to find out where she is!
I hope he is ok & that he checks in with someone soon!