My wife and I were talking with a neighbor whose husband was a sub commander in the Navy. He was retired and died last fall from a heart attack. She's still living alone across the street, and we occasionally see her or get to talk to her.
When her husband, Arland, was still on active duty they were living in Connecticut (Norwich or New London, I forget), and he was taking a new Trident sub out for its trials. She said she asked him what day he would be doing the deep dive drills (that always being a worrisome test on a new sub), and of course he replied, "You know I can't tell you that."
One night, some time during the cruise, the wife was awakened by the sound of the house creaking and groaning, and this continued for some hours. When her husband returned from the cruise she asked, "so, how did the deep dive go on..." and she gave the date the house made the mysterious noises. Arland apparently exploded, "Damn it, who's letting out that information? They know it's supposed to be classified."
I guess some ghost was letting her in on the schedule. Pretty freaky, huh?