
COMMISSION AGENDA – Briefing Item No. 11b Page 6 of 8
Meeting Date: April 28, 2026
Template revised September 22, 2016.
Finally, a new workforce assessment exploring the job-related impacts and needs associated with
the deployment of new maritime fuels will be completed later in the year. These studies and
industry and community discussions will inform the development of a final roadmap in 2027, with
recommended actions the Ports can take to support industry in the transition to cleaner fuels.
2025 Carnival Biofuel Demonstration Project
Holland America Line (HAL) and the Port conducted a 2025 demonstration project to test the
real-world feasibility, cost, operational risks, and emissions implications of using non-fossil
marine biofuels—specifically renewable diesel (hydrotreated vegetable oil, or HVO)—for cruise
operations departing Seattle. Although the demonstration proved that marine biofuel can be
safely bunkered and used on a segregated system aboard the MS Eurodam, the project exposed
significant barriers that prevent largescale adoption in Seattle today, including infrastructure
gaps, high costs, lack of incentives, fuel and vessel compatibility challenges, and the absence of
harmonized carbon intensity certification standards.
The project delivered 360 metric tons (MT) of HVO via barge over three deliveries. The fuel cost
was $2,200/MT—roughly 3x the cost of Marine Gas Oil (also called MGO, which is the
conventional low sulfur fuel that cruise ships use)—and about $1,000 per MT of carbon dioxide
equivalent (MTCO2e) avoided, compared to $120/MTCO2e for similar biofuels in areas within
the European Union where advanced biodiesel incentives are available. Without policy parity,
the cost gap is a major barrier to scalability. While operations were successful, the demonstration
highlights that marine biofuels will not become a scalable decarbonization lever in Seattle
without significant policy, infrastructure, and market development.
In conclusion, marine biofuels can be safely used on cruise vessels in Seattle, but they are not yet
scalable due to lack of demand, high fuel costs, limited regional infrastructure, vessel specific
compatibility challenges, inconsistent carbon intensity certifications, and the inability to access
U.S. fuel incentives. Renewable diesel required full segregation from conventional systems,
restricting which vessels could participate, and most available fuels exceeded the International
Maritime Organization (IMO) carbon intensity threshold, preventing operators from earning GHG
reduction credit. Short port calls, seasonal demand, and barge delivery constraints further limit
supplier participation. While emissions performance was comparable or slightly improved over
MGO, broad adoption will require aligned certification standards, expanded infrastructure, and
meaningful policy incentives.
Sustainable Maritime Fuels Collaborative
The Sustainable Maritime Fuels Collaborative (SMF Collaborative)—founded by Washington
Maritime Blue and the Port of Seattle, along with leadership from the Northwest Seaport
Alliance, Port of Tacoma, Washington Department of Commerce, and the Consortium for
Hydrogen and Renewable E-fuels (CHARGE) officially launched in April 2025. The initiative brings
together stakeholders across the maritime value chain, including fuel producers, vessel