ROMULUS 151
HII ROMULUS 151-class large displacement uncrewed underwater vehicle showcased at CNE 2026 for Royal Navy interest.
ROMULUS 151 is HII's medium-class uncrewed surface vessel, shown alongside REMUS 600 at the Combined Naval Event in Farnborough on 19 May 2026 as the US shipbuilder pitched a joint underwater robot programme to the Royal Navy with partner Babcock.
Last refreshed: 24 July 2026 · Appears in 1 active topic
Will ROMULUS 151 enter service with the Royal Navy or another European fleet?
Timeline for ROMULUS 151
Showcased at Combined Naval Event 2026 as part of HII subsea autonomy portfolio
Autonomous Systems: Land & Sea: US prime digs into UK seabed warBackground
ROMULUS 151 is an uncrewed surface vessel under construction by Huntington Ingalls Industries (HII), designed for persistent maritime patrol, intelligence-gathering and force-protection roles. It sits alongside HII's established REMUS family of subsurface uncrewed underwater vehicles as the company's medium-class surface offering.
HII showcased ROMULUS 151 at the Combined Naval Event in Farnborough in May 2026 as part of a push to establish a European autonomous-maritime presence, built around its enlarged Portchester hub and a partnership with Babcock. Presenting a surface vessel alongside a subsurface one signals an intent to offer allied navies a layered system: UUVs for mine hunting and seabed survey, USVs for patrol and sensor persistence.
As of May 2026 ROMULUS 151 remains under construction and has not entered service with any navy. Its significance for now is as a marker of HII's investment in expanding beyond subsurface vehicles at a moment when European navies, including the Royal Navy, are accelerating autonomous-systems procurement.
What is the HII ROMULUS 151?
Is the ROMULUS 151 in service with the Royal Navy?
