Неопознанное судно - тип Инженер А. Пустошкин

This is not a page for any specific vessel.
Below are the photos of different vessels of the same design, which had not been identified (at least, by the name) when uploading.
If you have information about any vessel on these photos, please leave a comment under it.

Design:	566 бис, Inzhener A. Pustoshkin
Builder:	Судостроительный завод «Ока» МСП СССР (ССЗ №342, предприятие п/я В-2566, предприятие п/я №31)
Built:	1957 or later
Registry:	РСССР
Registry class:	КМ(*) Л3[1] I нефтеналивное