Riddle Marine in Lewiston, Idaho is completing a new boat build for Gravity – a biodiesel 26′ landing craft research boat.  The boat has a crew cabin, pilot house, hydraulic system for winch and a-frame as well as an onboard generator.  The new boat has lots of forward deck space for sediment and water sampling and should move along nicely with a 315 HP Yanmar diesel motor and Hamilton 241 jet pump!