Offshore Vessels

FPSOs, platform supply vessels, anchor handling tugs, cable layers and construction vessels supporting the global offshore oil, gas and wind energy industry.

Total Offshore Fleet

~4,275 vessels

FPSOs Worldwide

180 units

PSV Fleet

1,420 vessels

Active Offshore Fields

600+

Offshore Vessel Types

Type	Role	Capacity	Fleet
FPSO Floating Production Storage & Offloading Largest offshore units — permanently moored, process and store crude oil or LNG	Production	0.5–3M barrels	180
PSV Platform Supply Vessel Supply platforms with fuel, water, drilling mud, bulk dry cargo and deck cargo	Supply	1,500–5,000 DWT	1,420
AHTS Anchor Handling Tug Supply Anchor handling, towing of rigs and platforms, emergency response, supply runs	Towing	80–350t bollard pull	530
DSV Dive Support Vessel Saturation diving and ROV operations for subsea construction and inspection	Subsea	SAT/IMCA systems	95
CSV Construction Support Vessel Heavy lift, pipe-lay, subsea tie-in, and offshore construction operations	Construction	300–700t crane	120
CLV Cable Lay Vessel Subsea power cable and telecom cable installation, repair, and burial	Cable	3,000–10,000t cable	65
CTV Crew Transfer Vessel Fast crew transfer to offshore platforms and wind farms, typically <24m LOA	Crew	12–24 pax	750
FSO Floating Storage & Offloading Storage and offloading only — no production processing capability	Storage	0.3–2M barrels	115

Major Offshore Regions

North Sea (Norway/UK)

Largest offshore hub — harsh environment, high standards

~1,800 active

Equinor, BP, Shell, TotalEnergies

Gulf of Mexico

Mixed shelf and deepwater operations

~900 active

Chevron, ExxonMobil, Shell, Murphy

Brazil (Santos/Campos basins)

Pre-salt deepwater — largest FPSO fleet globally

~600 active

Petrobras, TotalEnergies, Shell

West Africa (Angola/Nigeria)

Deepwater FPSOs dominant; high growth region

~500 active

TotalEnergies, Eni, ExxonMobil

Middle East (Persian Gulf)

Shallow water operations; platform supply dominant

~350 active

Saudi Aramco, ADNOC, KOC

DP Classification

Most offshore vessels operate with Dynamic Positioning (DP) systems that automatically maintain station without anchors. The IMO classes are:

DP1

Single redundancy — station keeping with single fault tolerance. Used for low-risk operations.

DP2

Dual redundancy — maintain position after any single failure. Required for most offshore ops.

DP3

Triple redundancy — maintain position after fire or flood in any one compartment.