Complex sentence: On board the "Racoon" upon arrival at Fort Astoria was Naukane (also known as John Coxe), a Native Hawaiian who had been hired by the North West Company as a laborer and to serve as an interpreter for future visits to the Hawaiian Islands.
Split into simpler sentences: On board the "Racoon" upon arrival at Fort Astoria was Naukane (also known as John Coxe), a Native Hawaiian. The North West Company had hired him as a laborer and to serve as an interpreter for future visits to the Hawaiian Islands.