A curable antifouling composition comprising components: a) at least one fluorinated polymer, wherein each said at least one fluorinated polymer independently comprises: at least one divalent group A represented by the formula wherein R 1 independently represents H or methyl, X independently represents a covalent bond or a divalent organic linking group, L 1 independently represents a covalent bond or a divalent organic linking group, and R fl independently represents a monovalent perfluorinated organic group; at least one divalent group B represented by the formula wherein L 2 independently represents a covalent bond or divalent organic linking group, k represents an integer in the range of from 1 to 4, R 2 independently represents H or an alkyl group having from 1 to 18 carbon atoms, and f independently represents an integer in the range of from 3 to 200, inclusive; at least one divalent group C represented by the formula wherein L 3 independently represents a covalent bond or a divalent organic linking group, and each Y 1, Y 2, and Y 3 independently represents a hydrolyzable group or a hydrocarbyl group having from 1 to 10 carbon atoms, with the proviso that at least one of Y 1, Y 2, and Y 3 is a hydrolyzable group; and b) cationic curative. a) at least one fluorinated polymer, wherein each said at least one fluorinated polymer independently comprises: at least one divalent group A represented by the formula wherein R 1 independently represents H or methyl, X independently represents a covalent bond or a divalent organic linking group, L 1 independently represents a covalent bond or a divalent organic linking group, and R fl independently represents a monovalent perfluorinated organic group; at least one divalent group B represented by the formula wherein L 2 independently represents a covalent bond or divalent organic linking group, k represents an integer in the range of from 1 to 4, R 2 independently represents H or an alkyl group having from 1 to 18 carbon atoms, and f independently represents an integer in the range of from 3 to 200, inclusive; at least one divalent group C represented by the formula wherein L 3 independently represents a covalent bond or a divalent organic linking group, and each Y 1, Y 2, and Y 3 independently represents a hydrolyzable group or a hydrocarbyl group having from 1 to 10 carbon atoms, with the proviso that at least one of Y 1, Y 2, and Y 3 is a hydrolyzable group; and at least one divalent group A represented by the formula wherein R 1 independently represents H or methyl, X independently represents a covalent bond or a divalent organic linking group, L 1 independently represents a covalent bond or a divalent organic linking group, and R fl independently represents a monovalent perfluorinated organic group; at least one divalent group B represented by the formula wherein L 2 independently represents a covalent bond or divalent organic linking group, k represents an integer in the range of from 1 to 4, R 2 independently represents H or an alkyl group having from 1 to 18 carbon atoms, and f independently represents an integer in the range of from 3 to 200, inclusive; at least one divalent group C represented by the formula wherein L 3 independently represents a covalent bond or a divalent organic linking group, and each Y 1, Y 2, and Y 3 independently represents a hydrolyzable group or a hydrocarbyl group having from 1 to 10 carbon atoms, with the proviso that at least one of Y 1, Y 2, and Y 3 is a hydrolyzable group; and b) cationic curative.