I am planning to go from Ukraine to Georgia crossing the Black Sea, not by a ferry but using a private boat.

I would like to know if some people have experienced crossing Black Sea, and if it is reasonable to do his by now given the current military context and many cruisers and destroyers from US or Russia beeing there.

Also, is there a right or a possibility to get boarded by a military vessel from Russia (or other country), since Russia has now control of Crimea and because of the tensions, are they concretely making the police on the Black sea or is it still international waters and they have no right to do anything.