The Expeditions four is a 149-passenger 65x24 foot Detroit Diesel-powered Teknicraft catamaran. The boat is powered by a pair of emission compliant Detroit Diesel Series 60 engines each delivering 740 HP @ 2300 RPM into Twin Disc MG 5114A SC marine gears with 2.5:1 ratios and turning 5-blade 36x39 inch Osborne propellers on three-inch Aquamet shafts.

The Expeditions four joins the Hone Heke fleet as their newest vessel. Hone Heke has a passenger ferry operation between their home port of Lahaina and Lanai, HI