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The United States Navy occupational rating of data systems technician (abbreviated as DS) was a designation given by the Bureau of Naval Personnel (BUPERS) to enlisted members who satisfactorily complete initial data systems technician "A" school training. The primary training location for the DS rating was Combat System Technical Schools Command (CSTSC) at Mare Island Vallejo, CA.
It was established in 1961 and merged into the electronics technician and fire controlman ratings on 1 October 1998.
DSs are electronics technicians who specialize in naval tactical data system computer systems including: digital computers, video processors, tape units, buffers, key sets, digital-display equipment, data-link terminal sets and related equipment. They clean, maintain, lubricate, calibrate and adjust equipment. DSs run operational tests, diagnose problems, make routine repairs and evaluate newly installed parts and systems units.