The location here is in the Gulf of Riga where the mutiny took place.

Captain 3rd Rank Valery Mikhailovich Sablin (Russian: Валерий Михайлович Саблин, Valerij Michajlovič Sablin) (1 January 1939 – 3 August 1976) was a Soviet Navy officer and a member of the Communist Party. In November 1975, he led a mutiny on the Soviet warship the Storozhevoy (Russian: Сторожевой, Storoževoj, meaning "Vigilant") in the hope of starting a Leninist political revolution in the Soviet Union. His mutiny failed and he was shot for treason nine months later.

• http://en.wikipedia.org/wiki/Valery Sablin