Robert Dean Stethem (November 17, 1961 – June 15, 1985) was a United States Navy Seabee diver who was killed by Hezbollah militants during the hijacking of the commercial airliner he was aboard, TWA Flight 847. At the time of his death, his Navy rating was Steelworker Second Class (SW2). He was posthumously promoted to Master Chief Constructionman (CUCM).