Frigate “Admiral Essen” has returned to Sevastopol, after completing the tasks on the fight against ISIS in Syria July 5, 2017 RR Army Frigate “Admiral Essen” © Vitaly Nevar/TASS, archive MOSCOW, 5 July. /TASS/. Black sea fleet frigate “Admiral Essen” has returned to Sevastopol after fulfilling combat missions off the coast of Syria, reports Russian defense Ministry. Comments comments