Abstract: An apparatus for collecting and removing contaminant material floating on the surface of a body of water, e.g., an oil slick. There are first and second boom portions which capture and direct the slick into a skimmer assembly which is mounted at an apex between the booms. The skimmer assembly incorporates three transversely extending cushions which serve as barriers or weirs: The first cushion reduces surface chop and prevents floating material from entering the assembly, the second cushion is partially submerged so as to act as submersion skimmer, increasing the thickness of the oil layer and slowing the current flow, and the third cushion is mostly submerged so as to act as a weir skimmer, over which the oil passes into a collection sump. The combined effect of the transverse barriers enables the system to be operated under adverse weather conditions and at relatively high speeds.