Ukraine acquires 2 tactical nukes? (from Viking News Africa)

No, not yet. I don't think it's possible. Those two nuke warheads lays down deep into the Black Sea (I think?).
To lure there it's not easy since russian submarines floating nearby.

I don't know, have you watched the movie called "The Abyss" by James Cameron (in the late 80's?).
There a plot was very very much similart: there was a nuke warhead, and a crew had to deep down to save it.