Freedom of Navigation in the Black Sea: Built by Appledore Shipbuilders in Bideford, Echo class HMS Echo is armed with 20mm, Mk44 7.62mm guns. HMS Echo entered BlackSea at 18:00GMT, escorted by Turkish Coast Guard TCSG29. She can remain for 21 days according to Montreux Treaty. pic.twitter.com/Vvbl51bgeb

— Yörük Işık (@YorukIsik) December 17, 2018