This standard applies to the coating of anti-corrosion and anti-marine biological fouling coatings for underwater parts of marine instruments (equipment). The requirements for the coated parts include structural design requirements, surface mass requirements and drawing marking methods and requirements. Coating mass requirements include that the selected Coatings should meet the corresponding product standards and must have factory certificates. When choosing the Coating variety, consider matching, process performance, adhesion and protection performance. Coating coating process requirements include surface preparation, undercoating, puttying, sanding, coating intermediate paint and coating anti-fouling paint.