DNV has given its backing to a blue ammonia floating production, storage and offloading (FPSO) concept jointly developed by BW Offshore and McDermott, Brazil-focused outlet Brazil Energy Insight reported this week. The endorsement clears an early technical hurdle for a design that would let operators convert offshore gas into a lower-carbon fuel at the wellhead rather than via a dedicated pipeline or onshore plant. Blue ammonia — ammonia manufactured from natural gas with the resulting CO2 captured rather than vented — is one of the routes oil and gas players are pursuing to monetize stranded or associated gas as a marine or power fuel.

What does the qualification cover?

DNV's qualification process reviews novel offshore designs against the society's class rules, covering structural integrity, marine systems, process safety, and emissions performance. A qualified concept has cleared an early technical benchmark. It does not commit DNV to class the vessel, nor does it imply a commercial pilot.

To reach a hull order, the BW Offshore–McDermott design still needs:

• a charter commitment from an operator,
• a final investment decision from a project sponsor,
• a yard selection and hull order,
• and DNV class assignment before construction begins.

Where does each partner fit?

BW Offshore operates one of the larger FPSO fleets globally, with multiple hulls on long-term contract to Petrobras in the Santos and Campos basins offshore Brazil. The Norwegian contractor has positioned floating production as its core business, taking delivery of several newbuilds since 2018 and redeploying former Very Large Crude Carriers as production units.

McDermott is a Houston-based offshore engineering, procurement, construction, and installation (EPCI) contractor with a process-technology portfolio that includes licensed ammonia, LNG, and ethylene designs. The pairing aligns a floating production specialist with a contractor that has shipped ammonia process units to onshore projects for decades.

Why is the Brazil framing relevant?

Brazil Energy Insight, the outlet that flagged the concept, focuses on Brazilian offshore developments. The country's pre-salt fields produce large volumes of associated gas, much of which operators currently reinject or vent because of limited export pipeline capacity and processing bottlenecks at the platforms. A floating blue ammonia unit would convert that gas into a shippable fuel at the platform, bypassing new subsea infrastructure and giving Petrobras and its partners a low-emission route to monetize molecules that today carry a venting or flaring liability.

The equatorial margin, where Petrobras and international partners are appraising deepwater plays, could add further gas resources to the offshore system through the late 2020s, creating a long runway for floating gas-to-product concepts.

How does this sit in the wider market?

Floating blue ammonia sits between two established offshore models: floating LNG, which has been in service for more than a decade on projects such as Shell's Prelude, and the older FPSO concept used for oil production. Adapting the model to ammonia introduces cryogenic storage and toxic-handling requirements that change the hull and topsides layout. DNV's qualification work covers those design differences, which is why the endorsement matters at this stage even with no sponsor attached.

What to watch next

The next milestones for the partnership are likely a memorandum of understanding with a Brazilian operator, a front-end engineering and design (FEED) award, or a yard selection. Watch the Santos and Campos basins for any announcement linking BW Offshore or McDermott to a Petrobras pre-salt development. A charter commitment tied to an existing pre-salt unit would be the clearest signal that the concept has moved from qualification to commercial development.