Just a suggestion. We did it in the sky over Iraq. Establish the corridors, run the mine-layers up and down a couple times, set up the RC-135/Global Hawk orbits with CAP‘s, notify the Russians and any threat to civilian shipping in the Black Sea will be dealt with accordingly, insurance underwritten by NATO. I’m pretty sure all the Navy(s) will need to do is pick up survivors. Maybe warm up the SeaRAMs to knock down a Russian missile or two.