[silverleaf]

Nope

Naval aviation can attack from well inside Russia and vessels can launch Kalibrs from bases deeper in Novorussiya

What’s happening to the Black Sea Fleet is a preview to all naval warfare planners, of the vulnerability of surface vessels. At least the Russians have strategic depth to keep fighting while protecting their fleet.

[Eleutheria5]

And as a result of the recent and increasing attacks on ships in Sebastopol, Crimea is no longer a thing for Russia.