There has been co-operation in the past between the Israeli and Turkish militaries I believe.
Would it be possible to use a sanitised Israeli torpedo/missile boat with a small crew to do a job in the Black Sea and scuttle the boat when mission accomplished and evacuate the crew through Turkey?
Torpedo might be better than missile, no aerial tracking and modern homing torpedoes work over the horizon anyway.
Remember the British torpedoing the heavy Argentine cruise Admiral Belgrano from 70 miles away during the Falklands War?