US Tug Owners Expand Fleets as New Energy Terminals Open

US operators are expanding their harbour tug fleets with newbuild vessels in response to new energy export terminals on the Gulf Coast and larger container ships on the eastern seaboard. Shipyards across the country are producing series of tugs built to ABS class with bollard pulls exceeding 70 tonnes and Tier 4-compliant propulsion to minimise emissions. The construction wave centres on supporting LNG carriers at growing Gulf Coast export terminals, with multiple owners commissioning vessels to berth, escort and assist ships across a range of US ports.

 

Drivers Behind the Newbuilding Wave

 

The surge in tug construction responds to two distinct shifts in US maritime activity. New energy export terminals are being built along the southern coast, increasing demand for vessels to handle gas carriers. At the same time, ultra-large container ships are arriving on the eastern seaboard, requiring capable harbour support. These trends have prompted owners to extend their fleets with purpose-built newbuilds. The result is a coordinated wave of tug construction across multiple US shipyards.

The vessels share common technical characteristics reflecting current regulatory and operational standards. All are built to ABS class with bollard pulls of more than 70 tonnes. They feature twin four-stroke main diesel engines driving two azimuth thrusters for manoeuvrability. These engines are connected to exhaust aftertreatment systems that reduce NOx emissions. This configuration ensures compliance with the US Environmental Protection Agency's Tier 4 requirements.

 

Gulf Coast Construction at Master Boat Builders

 

Master Boat Builders in Coden, Alabama, sits at the centre of Gulf Coast tug construction. The yard is producing series of terminal-support tugs for multiple owners anticipating continued LNG terminal construction. It has built two terminal tugs for market entrant Maritime Partners, with six more to follow in an eight-vessel programme. These 27-metre tugs are built to Robert Allan's RApport 2700 design. They are intended to manoeuvre, berth and undock gas carriers at the region's expanding LNG export terminals.

The yard's output for Maritime Partners has progressed steadily through 2026. The first vessel, Marauder, was delivered and operating at a terminal in Ingleside on Corpus Christi Bay by early June. The next vessel, Titan, was launched using a floating dock in May and should be ready for operations in early in the third quarter of 2026. Each vessel has a beam of 13 metres and FFV1 firefighting capabilities. This programme reflects the yard's central role in supporting Gulf Coast energy infrastructure.

 

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Escort Tug Programmes for Texan Owners

 

Master Boat Builders is also constructing escort tugs for Suderman & Young Towing. The yard launched and delivered Saturn as the first of the H500 series in the second quarter of 2026. Four 30-metre vessels are being built for the Texan owner to ABS class and Robert Allan's RApport 3000 design. Each offers accommodation for six crew, a beam of 13 metres, a bollard pull of 90 tonnes and a top speed of 13 knots. This programme supports the owner's expansion of fleet and marine services.

The construction aligns with Suderman & Young's broader growth near the Mexican border. The owner is expanding its fleet and marine services in the Texas ports of Brownsville and Isabel. Separately, Master Boat Builders delivered the tugs Jane and Jill to Gulf LNG Services during 2026. This entity is a joint venture between Bay-Houston Management, Bay Towing, Moran Towing and Suderman & Young. Both 395-gross-tonne tugs were supporting LNG carriers in Port Arthur, Texas, by late June.

 

Construction Across Other US Regions

 

Tug construction extends well beyond the Gulf Coast to yards across the country. In Florida, Eastern Shipbuilding Group launched the second of four 26-metre escort tugs for Saltchuk Marine. These vessels are built for ship escort and towage across the US West Coast, Hawaii and Alaska. In Maine, Washburn & Doughty Associates launched the ABS-class tug Mary McAllister for McAllister Towing. This 28-metre vessel is the sixth of a seven-tug series with a bollard pull of 84 tonnes.

Further construction is under way to serve terminals on major inland and coastal waterways. Crescent Towing took delivery of the escort-class tug Kentucky from Blakeley BoatWorks in the first quarter of 2026. The 28-metre vessel enhances operations at terminals on the Lower Mississippi River with 4,475 kilowatts of installed propulsion power. Great Lakes Towing named its latest ice-class tug, Puerto Rico, as part of a long-term fleet renewal campaign. It is the tenth ice-class harbour tug built by Great Lakes Shipyard for its sister company since 2016.