Alan, 341.1 is the Base/Ops freq for the VX-1 sqdn at Pax. Perhaps they were doing some training in the areas over the Chesapeake and the helo needed to contact them to coordinate a transit. On Tues I was fishing in the Bay and noticed a low flying HH65 from Atlantic City crusing down the Bay at about 500 ft. It was flying over the Bay Bridge headed south. Ron