http://www.marinelink.com/news/repowering-a-hawaiian-tug-more-power-better-air-quality324879
Repowering a Hawaiian Tug: More Power, Better Air Quality
Photo of Kamaehu courtesy of Sause Bros. Inc. Sause Brothers, based in Coos Bay Ore. also operate tugs out of Long Beach, California and Honolulu, Hawaii.