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Unmanned Systems

HII Delivers Navy’s First Lionfish UUVs

Monday, April 7th, 2025

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HII Delivers Navy’s First Lionfish UUVs

HII REMUS 300 small uncrewed undersea vehicles (SUUV) being built for the Navy is based on its REMUS 300 platform to replace the aging Mk 18 Mod 1 Swordfish UUV. (Photo: HII)

HII on Monday said it delivered the first two Lionfish small uncrewed undersea vehicles (SUUV) to the Navy under a contract that could reach up to 200 vehicles. Lionfish is based on HII’s two-man portable REMUS 300 platform, which a company statement boasted is a modular, open-architecture SUUV designed for multi-mission adaptability and developed with the Navy and Defense Innovation Unit (DIU). The company noted this is the Navy’s first program transitioning from an other transaction prototype vehicles to full-scale…

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