The Central Area Transmission System (CATS) is a natural gas transportation and processing system that transports gas from the Central North Sea to Seal Sands, Teesside. CATS, which comprises a riser platform, pipeline and processing terminal, is owned by CATS Management Limited, a subsidiary of Antin Infrastructure Partners. The pipeline and terminal are operated by Wood. Gas producers connect directly to CATS via the riser platform or at any of the subsea tees along the pipeline. At the terminal, the pipeline gas is treated to remove contaminants, and is metered before being routed to either the CATS gas processing trains, or to the adjacent Teesside Gas Processing Plant (TGPP).