As an ex US submarine officer, I found some to the facts here difficult to believe. It is possible that the Soviet navy was just very different from the US. Still it is difficult to believe that the Soviets did not know how to do an air drop at sea or design fail-safe reactors.
I found the characters: their lifestyle and politics interesting. The officers of a submarine must have been a very conservative sample of Soviet society yet, here in 1986, they were feed up with the Soviet regime and mocked its politics.