A US-registered NATO patrol plane spent nine hours over international waters in the Black Sea, matching its previous record, an air traffic control services source told TASS. "The Bombardier ARTEMIS II aircraft took off from an airport in Constanta, Romania, and began flying over the southern Black Sea at approximately 9:40 am. Moscow time, in a west-to-east direction and back at an altitude of about 11 km," the source said. During several turns, the plane approached the Romanian-Ukrainian border area but did not enter the airspace of any coastal state other than Romania, he noted.