In addition to the Submarine Warfare insignia there are several special insignia. Since 1943 the Submarine Medical insignia has been awarded to medical officers of the Navy Medical Corps qualified in submarine warfare and medical expertise. The Submarine Engineering Duty insignia is issued to Engineering Duty Officers who have been designated as qualified in submarines through a program administered by the Naval Sea Systems Command and was first awarded in 1950. The Submarine Supply Corps insignia has been awarded to members of the Navy Supply Corps who have qualified as Supply Officers on board U.S. submarines since 1963.