The Navy began testing the Defense Enrollment Eligibility Reporting System (DEERS) in 1980 to help medical providers identify eligible users and prevent fraud. Active duty and retired Navy personnel were initially enrolled in the database. The USS Francis Scott Key became the first Trident I missile-equipped submarine to begin operational patrols, significantly increasing the range of US nuclear deterrent capabilities. Several changes were made to Navy uniforms in 1980, including authorizing jumper-style uniforms for E-5 and below and new styles of shirts, caps, and bags for female sailors.