Marine surveyors conduct inspections of vessels of all types, including commercial vessels, cargo vessels, passenger vessels, barges, tugboats, warships, ferries and pleasure yachts that are under 20 meters, all the way up to tankers measuring over 200 meters. They also inspect marine cargo and facilities like drydocks, canals, docks and oil rigs for pre-purchase evaluation, insurance claim resolution, regulation compliance and marking insurance eligibility.