These things have been in use for many months, several of them inside Sebastopol Harbor. No doubt the Russians have captured one already.
This one just seems a bit bigger and faster. I doubt its to the level of a critical secret.
Maybe they mean to keep the Russians from approaching to inspection range of vessels near the Uke coast, or maybe its to reassure their own people.
No doubt the Russians have captured one already.
I would be surprised if they have as they are meant to blow up with a push of a button.