British Type 31 Frigate Variant Offered To The U.S. Navy

British defense contractor Babcock has confirmed that it is putting itself forward for the U.S. Navy’s future frigate program, with its Arrowhead 140 general-purpose frigate, the design behind the Royal Navy’s Type 31 class, expected to form the basis of its proposal. The move adds another foreign-designed warship to Washington’s search for a relatively mature frigate that can be built quickly and in significant numbers.

Babcock has held preliminary discussions with Pentagon officials and is expected to submit an expression of interest before the end of October, according to recent reporting by The Telegraph and Navy Lookout. The proposal is understood to potentially involve Huntington Ingalls Industries (HII), America’s largest military shipbuilder, with the two companies exploring an arrangement that could see the Arrowhead 140 built in the United States under license.

An artist’s impression of the U.K. Royal Navy Type 31 general-purpose frigate. Royal Navy

“Of course we’re interested. We have a world-class frigate, close links to the U.S. and U.S. industry. It would be insane for us not to respond,” Sir Nick Hine, head of Babcock’s marine business and a former Second Sea Lord, told The Telegraph.

The initiative comes as the U.S. Navy seeks to accelerate the acquisition of smaller surface combatants after the troubled Constellation class frigate program was axed. Japan’s upgraded Mogami class, South Korea’s Chungnam class, and Turkey’s Istanbul class have also been reported as candidates for the Navy’s international frigate effort. You can read more about all three designs here.

The Japan Maritime Self-Defense Force’s (JMSDF) first-in-class JS Mogami. JMSDF The South Korean Navy’s ROKS Chungnam seen during sea trials before its delivery in 2024. HD Hyundai Heavy Industries The future TCG Izmir from Turkey’s Istanbul class. Anadolu Shipyard

Fincantieri Marine Group, which had developed the cancelled Constellation class frigate for the U.S. Navy, also says it sees a possible new opportunity in the service’s latest frigate plans. 

Meanwhile, German defense contractor Rheinmetall, a newcomer to the surface combatant market, recently unveiled its GMF 140 frigate, which it has said it plans to offer “initially as part of a procurement project in North America” before pursuing opportunities with other allied navies.

For Babcock, the opportunity would be a major expansion of its relationship with the U.S. defense industry. If successful, the company would likely provide the design, engineering expertise, and potentially the intellectual property needed for American shipyards to manufacture the frigates.

This would mirror the process for the Polish Navy’s Project 106 Miecznik (Swordfish) class, which is building three new multirole frigates in Poland, rather than using the company’s own facilities in Britain.

The future Polish Navy frigate Wicher under construction in Gdynia, Poland. Photo by Mateusz Wlodarczyk/NurPhoto

The Navy’s assessment of potential options is due by November 12. No contract has been awarded, and the details of any Babcock-HII proposal remain unconfirmed.

The Arrowhead 140 is the foundation of the Royal Navy’s five-ship Type 31 program, which is being built at Babcock’s Rosyth shipyard in Scotland. The design is derived from the Danish Iver Huitfeldt class frigate. As well as Poland, the warship has also been selected for Indonesia.

The Arrowhead 140 has a baseline length of approximately 455 feet, a beam of 65 feet, and a displacement of around 5,700 tonnes, although national variants may be considerably heavier. The vessel uses a conventional combined diesel-and-diesel (CODAD) propulsion system and can achieve speeds exceeding 28 knots. Its design emphasises long endurance, with a baseline endurance of approximately one to two months. The AH140 incorporates a flight deck and hangar for naval helicopter operations, accommodation for embarked personnel, boat-handling facilities, and adaptable mission spaces. Its modular architecture allows customers to integrate different sensors, combat management systems, electronic warfare equipment, and weapons according to national requirements.

Taking the Polish Navy’s Project 106 class as an example of an Arrowhead 140 iteration, this is a notably heavily armed adaptation, featuring a 76mm Leonardo Strales main gun, a 32-cell Mk 41 vertical launch system for surface-to-air missiles, eight Naval Strike Missiles for anti-ship strike, and lightweight torpedo launchers. The Polish variant is reported to have a maximum displacement of approximately 7,700 tonnes.

Wicher, the first of the Polish Navy’s Project 106 Miecznik (Swordfish) class. PGZ SW

The Type 31 is a general-purpose warship capable of undertaking maritime security, escort, and surface warfare missions. Its relatively large hull offers considerable internal volume for weapons, sensors, aviation facilities, and future upgrades.

That could make it attractive to a U.S. Navy looking for a ship abl

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