Inter-Island Steam Navigation Company was a company headquartered in Honolulu that ran steam boat service between Hawaiian cities from 1883 until 1947. On January 30, 1929, the company founded a subsidiary, Inter-Island Airways, that would later become Hawaiian Airlines. Hawaiian Airlines today is a major airline.
The company was formed as a result of incorporation of a fleet of a few steamers owned by the captain Thomas R. Foster.
Inter-Island's passenger service was discontinued in 1947.
References
Inter-Island Steam Navigation Company Wikipedia(Text) CC BY-SA