Many navies are switching over to silicone-based antifoul
paint, with good results.
However, these paints are probably not suitable for ordinary sailing yachts, for a relatively high cruising speed is necessary to remove the fouling that grows when in port or at
anchor. For HempasilX3+, Hempel recommends more than *8 knots*:
HEMPASIL X3 87500 | Hempel.com
Alain