Mikhail Vasilyevich Motsak (Russian: Михаил Васильевич Моцак; 22 November 1949 – 19 October 2019) was a high-ranking career officer of the Soviet and Russian Navies. Born in Moscow, Motsak grew up in Sevastopol, attending the and starting his naval career as an engineer in the Pacific Fleet. Rising through the ranks to more senior positions, he served on submarines in various roles, transferring to the Northern Fleet and his own submarine commands in 1982. Commended for his performance, Motsak graduated to various staff positions in the fleet, was promoted to rear-admiral in 1993 and became commander in 1993. In 1994 he was awarded the title of Hero of the Russian Federation. In May 1999 Motsak was appointed Chief of Staff and First Deputy Commander of the Northern Fleet.