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Three icebreakers Yamal St Laurent Polar Sea. Three icebreakers Russian Yamal Arktika class CCG Louis St Laurent USCG Polar Sea Yamal Russia IMO number Callsign UCJT CCG Louis St Laurent Canada IMO number Callsign CGBN USCG Polar Sea United States of America IMO number Callsign NRUO uscg mil php gview keyalbum KeywordAlbum