International Paint Ltd., London/UK
The economic importance of underwater hull condition cannot be understated. Any increase in underwater hull roughness can result in a significant rise in vessel operating costs. There are two main types of hull roughness : physical and biological (fouling), each with their own macro (large scale) and micro (small scale) characteristics.
- Macro physical roughness can be attributable to plate waviness, plate laps, seams and butts, welds and weld quality, mechanical damage and corrosion
- Macro biological roughness is typically attributable to animal and weed fouling.
- Micro physical roughness can be attributable to steel profile, minor corrosion and coating condition.
- Micro biological roughness is typically attributable to slime fouling
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