Yenisey is part of the Black Sea Fleet.

The four Ob-class hospital ships were designed to provide medical and recreational facilities.

They have civilian crews but carry uniformed naval medical personnel.

Later two units are Project B-320 II, implying a modification to the basic design; the external differences are minor.

She was laid down on 10 September 1979 and launched on 4 April 1980 by Adolf Barsky shipyard.