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About The most secretive of Navy vessels, a submarine requires a select community of specially trained professionals to operate its classified, highly advanced hardware. The Sailors in the Submarine Electronics Computer Field (SECF) work with a submarine's sonar, weapons, communications and navigation systems. The training is rigorous and the career opportunities are equally impressive. Qualifications and Requirements A high school diploma or equivalent is required to become an Enlisted Sailor in the Submarine Electronics field in the Navy. Those seeking a position in this community must be U.S. citizens who can meet eligibility requirements for a security clearance. General qualifications may vary depending upon whether you're currently serving, whether you've served before or whether you've never served before. Learn more about life in the Navy at