Complex sentence: On December 25, they rounded Cape Horn and sailed north, reaching the Hawaiian Islands on February 12,1811, where they dropped anchor at Kealakekua Bay (then known as the "Sandwich Islands" and "Karakakooa").
Split into simpler sentences: On December 25, they rounded Cape Horn and sailed north, reaching the Hawaiian Islands on February 12,1811. They dropped anchor at Kealakekua Bay (then known as the "Sandwich Islands" and "Karakakooa").