I doubt that someone holding a Power of Attorney can do such a thing. It would generally be up to the Judge who the case comes before. As long as its an uncontested case, it could probably go through, however, if there are issues that are left outstanding, then that's a very different story.
Have him check with his JAG officers to see if they can do it long distance because he's deployed overseas.
If the divorce is uncontested, all he would need to do is file a motion to waive his appearance and submit an affidavit saying that he agrees to all the terms. He does not need to be present for the final hearing.
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