NACE SP21421

Abstract

General Introduction This standard provides a pictorial system to help identify and describe the degree of biofouling on a ship, in terms of its gross composition and level of coverage, as viewed, photographed or otherwise recorded underwater. Pictorial based degree of biofouling The standard provides eight sets of pictorial-based expressions of biofouling degree, for assisting the reporting and evaluation needs of in-water inspections that include a biofouling survey. No interpretation or guidance is provided with respect to the potential level of hull resistance or likelihood of invasive species infestation afforded by particular degree(s) of biofouling, and no guidance is offered regarding the particular degree(s) of biofouling that warrant or justify its removal by hull grooming or other remedial treatment.