NASBLA Public Library

This technical report from the Australian Maritime College at the University of Tasmania documents a controlled full-scale wave wake study conducted in collaboration with the Oregon River Safety and Preservation Alliance (ORSPA) to evaluate wave characteristics generated by wakesurfing, wakeboarding, skiing, and recreational powerboat operations. Using calibrated instrumentation and standardized hydrodynamic testing methodologies, the study measured wave height, wave energy, vessel speed, ballast conditions, lateral distance, and wake dispersion patterns under real-world operating conditions on the Willamette River. The report provides detailed discussion of vessel wave mechanics, Froude number analysis, hull slenderness ratios, wave energy calculations, and comparative wake performance between ballasted and non-ballasted vessels. Extensive charts and graphical analyses compare wake profiles at varying operational distances and speeds. For Boating Law Administrators, marine law enforcement agencies, and policymakers, this resource offers scientifically grounded technical data useful for evaluating setback distances, shoreline protection strategies, operational guidance, and evidence-informed waterway management policies involving wake-enhanced recreational vessels.