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HISTORICAL DOCUMENT. Measuring hull roughness of vessels in dry-dock. Limited to a methodology—no interpretation presented. Hull roughness has a major impact on vessel fuel efficiency.
HISTORICAL DOCUMENT. This standard defines the methodology of measuring hull roughness of vessels in dry-dock. This standard does not mention the type of instrument/gauge for such measurements. This standard is limited to a methodology—no interpretation of the results obtained is presented. One of the factors affecting a ship’s performance and fuel consumption is the roughness of its foul-free underwater hull. The condition and type of paint system used may have a major influence on hull roughness and ship performance. Hull roughness has a major impact on vessel fuel efficiency and exhaust emissions. This standard focuses on the mechanical roughness of the hull. A roughness survey is used to arrive at a measured value to determine the added friction drag caused by the roughened, but foul-free, coated surface. Key words: Ship hull vessel roughness measurement gauge survey dry-dock
One of the key factors affecting ship performance, particularly fuel consumption and associated GHG (Green House Gas) emissions, is the degree of biofouling on the immersed hull and propeller(s). Rates of biofouling accumulation vary considerably, depending on the suitability, age and physical condition of the coating system(s) applied to the hull, the voyaging, anchoring and lay up patterns of the ship, and the geographical regions where these take place.
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For those managing, planning, selecting, implementing, or evaluating buried pipe inspections using Non-Destructive Evaluation (NDE) at nuclear power plant sites. Licensing. Regulations. Inspection. Tools. Analysis.
Ballast water carried by ships keeps them upright during loading and offloading operations and provides balance, stability, and trim during sailing. Because ballast water is loaded from the surrounding port or coastal waters, organisms in the ballast water sometimes establish populations resulting in biological invasions, which may have severe ecological or economic impacts. This standard is designed to test the effect of long-term accelerated exposure of treated water on coating systems.