The document provides information about the Hummingbird Spirit, a cylindrical semi-submersible floating production storage and offloading unit owned by Teekay Petrojarl. It has a capacity of 270,000 barrels of storage and can produce up to 25,000 barrels of oil and 30,000 barrels of total liquids per day from the Chestnut Field in the UK North Sea, where it is spread moored in 120 meters of water.