Dunno.
Lot’s of Hurricanes, ebb and flow, have occured since then. It could be covered with so much sand that it would be impossible to find.
They know where it is. The problem is the radioactive part is surrounded with lots of high explosives. They could recover the radioactive part but if they trigger the explosives they kill people and spread the radioactive parts over a fairly big area. No danger from it actually triggering a nuclear explosion though.