What Is A Marine Survey? A marine survey is a detailed inspection of a vessel to evaluate its overall condition, safety, and value at the time of examination. A marine surveyor carefully inspects the structure, systems, and equipment to determine whether the vessel is seaworthy and meets safety standards. Hiring a Society of Accredited Marine Surveyors (SAMS) marine surveyor provides a higher level of professionalism, credibility, and protection for boat buyers, owners, lenders, and insurers.