The image of a Turkish warship passing through the Corinth canal is not a usual occurance. The ship in question is the anti-torpedo ship Sokullu Mehmet Pasa. The video has gone viral with a number of viewers believing that the ship had something to do with two frigates around the Aegean between Lesbos and Chios in violation of Greek territorial claims.
Protothema.gr found out that the Sokullu Mehmet Pasa and Turkish Akcakoca, that also passed through the Corinth canal on Saturday, were part of Ariadne 2015, joint exercise in the region that began in November 2015 and took place around the Ionian and Gulf of Patra.