Floating Production Storage and Offloading
Abbreviation: FPSO
Vessel that processes hydrocarbons from a subsea well, stores the production in cargo tanks, and offloads to shuttle tankers.
In practice
Static-station operation on a single field; class survey arranged in-place every 5 years. Crew run 28-day rotations typically.
Regulatory detail & full definition
Permanently moored on field for 15-25 years. Often a converted VLCC hull. Topsides processing modules: separation, gas treatment, water injection, gas re-injection, oil export. Key operators in Brazil (Petrobras, MODEC), West Africa (TotalEnergies, Shell), North Sea (Bluewater, BW Offshore). Crew 50-150.
Authoritative source: International Maritime Organization ↗
Related
Source: IMO Res. A.671(16); industry usage
High confidence
Editorial confidence: how we grade.