There is supposed to be a nuclear weapon on the ocean floor about 150 miles south east of AC New Jersey that was jettisoned from an aircraft in a storm in the 50’s. Never found .
Not sure about that one, but there is definitely one off the SE Georgia coast. The government has searched for years to find it but it is mired in the muck so deeply it has never been observed. Of course it is a mega tonage weapon unfortunately which does worry us when we think of it.