Engineering duty officer

An engineering duty officer (EDO) is a restricted line officer in the United States Navy, involved with the design, acquisition, construction, repair, maintenance, conversion, overhaul and disposal of ships, submarines, aircraft carriers, and the systems installed aboard (weapons, command and control, communications, computers). As of August 1, 2016, there are approximately 835 engineering duty officers on active duty in the U.S. Navy, representing approximately 2 percent of its active-duty commissioned officers (and approximately 400 engineering duty officers in the Navy Reserve).