US-based shipbuilder General Dynamics NASSCO has delivered a new ECO Class tanker, Constitution, to SEA-Vista.

Built to comply with the American Jones Act, the 610ft-long vessel has a 50,000 deadweight-tonne capacity and a 330,000 barrel cargo capacity.

Discover B2B Marketing That Performs

Combine business intelligence and editorial excellence to reach engaged professionals across 36 leading media platforms.

Find out more

Constitution is a liquefied natural gas (LNG) conversion-ready product tanker, which will be operated by Seabulk Tankers.

"A steady production run of eight ships improves hull-to-hull learning and has allowed us to deliver increasingly higher-quality, world-class vessels."

The ship will further help the US shipping industry in achieving cleaner and more fuel-efficient modes of transportation.

Constitution has been built under an eight-ship programme for two separate customers and is the sixth ECO Class tanker built by NASSCO to join the Jones Act trade.

General Dynamics NASSCO vice-president and general manager Kevin Graney said: “With this programme we contracted with two customers seeking similar capabilities.

GlobalData Strategic Intelligence

US Tariffs are shifting - will you react or anticipate?

Don’t let policy changes catch you off guard. Stay proactive with real-time data and expert analysis.

By GlobalData

“A steady production run of eight ships improves hull-to-hull learning and has allowed us to deliver increasingly higher-quality, world-class vessels.”

Last month, Constitution completed tests and trials off the coast of San Diego, California, US. Construction on the ship commenced in June 2015.

In September, NASSCO delivered the fourth vessel, Bay State, constructed as part of five ECO Class product tankers, under contract with American Petroleum Tankers.

The Jones Act is a United States federal statute that requires ships carrying cargo between US ports to be built in US shipyards.


Image: Sea trials for Constitution. Photo: courtesy of General Dynamics NASSCO.

Ship Technology Excellence Awards - Nominations Closed

Nominations are now closed for the Ship Technology Excellence Awards. A big thanks to all the organisations that entered – your response has been outstanding, showcasing exceptional innovation, leadership, and impact.

Excellence in Action
Dual winner of the 2025 Ship Technology Excellence Awards , Flyability’s Elios 3 UT drone is redefining ship inspections. See how class-approved LiDAR and UT data, collision-tolerant design and digital twins are replacing scaffolding and rope access with faster, safer remote inspection workflows.

Discover the Impact