The present application discloses a solvent-borne antifouling coating composition comprising an erodible non-silicone based binder system, one or more metal-containing biocides (like cuprous oxide, copper pyrithione (copper omadine), zinc pyrithione (copper omadine) and zinc-ethylenebis(dithiocarbamate) (Zineb)), and one or more non-reactive polyoxyalkylene-modified silicone oils, in particular PEG/PPG-modified silicone oils, such as those having a hydrophilic-lipophilic balance (HLB) of e.g. 9-18. The application also discloses a marine structure comprising on at least a part of the outer surface thereof an outermost self- polishing antifouling coat or coating system.