FPSO
From ACT Wiki
FPSO is an abbreviation for Floating Production Storage and Offloading vessels.
FPSOs, are offshore oil and gas production facilities that house both processing equipment and storage.
Most FPSOs comprise a ship-shaped vessel, with processing equipment, or topsides, aboard the vessel's deck and storage below in the double hull.
After processing, an FPSO stores oil or gas before offloading periodically to shuttle tankers or transmitting processed petroleum via pipelines.
Some FPSOs are converted tankers. Others are purpose-built.