“Sent to evaluate the crew and staff of a new U.S. state-of-the-art nuclear submarine during its trial runs, the head of the U. S. DoD PsyOps Division discovers her vengeful ex husband has planted a computer virus to destroy her while on board. Will this deadly psychological war destroy everything?”

This seems very fatty to me, I think you could trim a lot off of it and still retain the story. Also one sentence is better that two. Perhaps:
"Sent by the Department of Defense to evaluate a nuclear submarine during it's trial run, _Insert_Name_Here_ discovers her vengeful ex husband has planted a virus on board with the intention of killing her."
I think that really sums up the drama and excitement. I like the idea, it feels like the show "24" with the countdown and the action but it could have a romantic streak if you wanted I think.
Good luck!