Determined, Cook continued south, and on January 17, 1773, his ship, the Resolution, and its companion, the Adventure, were the first vessels known to cross the Antarctic Circle.
Otsusekindlalt purjetas Cook edasi lõuna poole ning 1773. aasta 17. jaanuaril ületasid tema laevad „Resolution ” ja„ Adventure ” teadaolevalt esimestena lõunapolaarjoone.