 Britain's Royal Navy said, in a statement on August 31, that its warships and patrol aircraft tracked a series of Russian vessels close to its waters in what it called a concerted monitoring operation. The Navy said the HMS Tine and HMS Portland reported on the movements of Russian Navy vessels alongside Royal Air Force P-8 Poseidon patrol aircraft in the English Channel, North Sea and North Atlantic. A number of the Russian vessels were associated with Russia's Navy Day, which took place on July 30 in St. Petersburg, a Royal Navy statement said. The statement listed the vessels as including Corvettes Boyke and Grad, cruiser Marshal Yustinov and the Udeloy-class destroyer Severomorsk.