Naval standoff on the Black Sea

A seaman stands aboard the Turbinist Russian navy minesweeper patrolling the harbor of Sevastopol, on March 10, 2014. The Ukrainian flag has never really been embraced in Sevastopol and its famed port, home to Russia's Black Sea fleet since the time of the tsars.AFP PHOTO/ VIKTOR DRACHEVVIKTOR DRACHEV/AFP/Getty Images
A seaman stands aboard the Turbinist Russian navy minesweeper patrolling the harbor of Sevastopol, on March 10, 2014. The Ukrainian flag has never really been embraced in Sevastopol and its famed port, home to Russia's Black Sea fleet since the time of the tsars.AFP PHOTO/ VIKTOR DRACHEVVIKTOR DRACHEV/AFP/Getty Images

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    Naval standoff on the Black Sea

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The Russian Navy continues to block the Ukrainian Navy from leaving Sevastopol. CNN's Matthew Chance reports.