History of Oceania

What is the an RD 3 in US Navy?

The RD 3 is the Navy acronym for "Research and Development Third Class". It is a paygrade reserved for enlisted personnel in the United States Navy who have completed the RD "A" School. The RD 3 is responsible for conducting research, development, test and evaluation of naval systems, equipment and materials. They may also be responsible for providing technical support to fleet units.