This document is on Kerry's web site and confirms what Polybius posted. He and his campaign are aware that he was not discharged from the Navy in 1970. His web site use to show a two year gap from 1970 to 1972 in his service. In 1972 it showed his request for transfer to standby reserves. We know why he did not show his reserve status during that time. Kerry has changed his service time line to end with his separation from active duty. Not so says the document he signed.
Official Navy records above show that Kerry was transferred from active duty to the Naval Reserve on January 3, 1970. He was put on standby reserve on 1 July 1972. He was finally discharged from the Navy on February 16, 1978.