The Captain FPSO receives production from subsea wells via risers and processes fluids through three-phase separation. Facilities include crude oil heating, stabilization, produced water treatment, and extensive water injection systems designed to support reservoir pressure. Produced water is treated and reinjected or discharged as appropriate. Associated gas is primarily used for fuel, with surplus handled via controlled systems. Stabilized oil is stored in hull tanks and offloaded to shuttle tankers in tandem configuration. Utilities include power generation, seawater lift, firewater and deluge systems, chemical injection, inert gas systems, and integrated control and safety systems. The FPSO is turret-moored, allowing it to weathervane under environmental loading. The vessel has played a long-term role as the central processing hub for one of the UK's largest heavy oil developments.