Q: are low friction bottom coatings or bottom paints legal?
A: This is covered by RRS R 53; 53 SKIN FRICTION
A boat shall not eject or release a substance, such as a polymer, or
have specially textured surfaces that could improve the character of
the flow of water inside the boundary layer.
--From the pages of the IOM ICA Forum...Does anyone remember the "riblets" on Stars & Stripes '87? This is the "anti-riblets rule"!