Teekay Offshore Partners L.P. (Teekay Offshore) is an international provider of marine transportation and storage services to the offshore oil industry. It operates in four segments: the shuttle tanker segment, the conventional tanker segment, the floating storage and off-take (FSO) segment, and the floating production, storage and offloading (FPSO) segment. As of December 31, 2011, its shuttle tanker fleet consisted of 40 vessels (including four newbuildings) that operated under fixed-rate contracts of affreightment, time charters and bareboat charters. It has a fleet of 10 Aframax conventional crude oil tankers, six of which operate under fixed-rate time charters with Teekay Corporation, two which operate in the spot tanker market and two vessels, which have additional equipment for lightering, operate under fixed-rate bareboat charters with Skaugen PetroTrans.