US E-6B Mercury tracked from Patuxent River

A US Navy E-6B Mercury aircraft has been tracked using its tactical hex code #AFDA94, operating out of Patuxent River Naval Air Station in Maryland. The aircraft was observed heading into the CIRCUS box yesterday evening, working with New York airspace control and passing between heavy precipitation. It was operating under DUE REGARD procedures, indicating it was not in contact with air traffic control, and its callsign was noted but not heard on HF radio.