This standard stipulates the type, shape, color, light quality and setting requirements of the navigation aids used to mark the underwater structures (structures) in the sea area of China. This standard is applicable to the aids-to-navigation marks set up to mark the water structures (structures) in the sea area with fixed positions in the navigable waters of the sea area of China. This standard does not apply to buildings (structures) specially set up as aids to navigation, nor to Qihai bridges