Yasen in Drydock (Patreon)

A very clear photo of the Yasen out of the water.  The control surface hydraulics are depressurized causing the stern plans to fall down to the mechanical stops.  Looks like about 40 degrees.

There is a fresh water hose from a hull penetration to prevent discharge form freezing against the hull.

The purpose of the large hull penetration just forward of the planes is unknown.