Not sure how true it is but I remember the older dockers telling us that back in the 60/70’s the Russian ships actually had armed kgb agents aboard to keep em in line...Probably scared whit less of the prospect of a few years in Siberia made the them tow the line. I f by the odd chance you holiday in the former USSR be sure to book a visit to Dzerzhinsky Square. the Lubyanka Prison, an interesting experience.