1/ One thing i forgot to mention that 2 of our Yugo still in active duty- so that 5 in total
2/ Before the actual purchase in 2009 , Our crew have been in Russia for 4-6 years (maybe longer for specialist tasks) to learn how to operate the subs (both in class room and in actual subs) plus the new tech and skills , in my view they are pretty familiar with the subs before their delivery , and my point is : experience in a old car ( a 20 years old ones :3 ) cant help you beat a new car
3/ We are also buiding many specialize ships to rescue our subs in time of need (I do have a picture of 1 type but If I post it i might got an ***-kicking by C2 so sorrry ) In the end of day , as long as our safety protocols are met , there will be no need of a rescue operation