I have 35 years of experience, and specialize in the field of naval architecture with specific knowledge in the areas of surface-piercing propellers, small craft accident reconstruction and personal water craft (PWC, such as a Jet Ski) off-throttle steering accidents. I have published on such topics as surface piercing propellers, propeller contact accidents and urban passenger ferry systems. I have testified 14 times on topics such as yacht sinking, boating accidents and PWC (Jet Ski) maneuvering and stopping.