After a modification is made to a Public Vessel, who must re-certify the boat's stability to the state?

• A. Local harbor master certifies stability to the state
• B. Naval architect/professional re-certify the boat's stability to the state
• C. Insurance agent certifies the boat's stability
• D. Coast Guard certifies the boat's stability

Answer: (B)

After a modification that affects stability, a naval architect or other qualified professional must re-certify the vessel’s stability to the state. This is because changes in weight distribution, buoyancy, and the vessel’s center of gravity can alter how the boat sits in the water and how it behaves in waves. A licensed naval architect has the training and tools to redo the stability calculations, reassess trim and stability margins, and produce updated documentation that shows the vessel still meets the required safety standards. The state requires that this certification come from a professional with expertise in stability, not from a local harbor master or an insurance agent. The Coast Guard may perform inspections for safety, but the formal re-certification of stability after a modification is provided by the qualified professional for state records.