REMUS (100 / 300 / 620)

HII's REMUS family (REMUS 100/300/600/620) is the legacy-prime of the defense-subsea cohort: autonomous undersea vehicles for mine countermeasures, hydrographic survey, ISR, and electronic warfare, built by HII's Mission Technologies division, with a lineage dating to 2001 (Hydroid and Woods Hole Oceanographic Institution heritage; HII acquired Hydroid in 2020 for about $350 million). The REMUS 620 (introduced 2022) is a newer medium-class long-endurance UUV with up to 110 hours of endurance and 275 nautical miles of range, and a torpedo-tube-launched 'Yellow Moray' variant was fielded from the submarine USS Delaware in 2025. Cap-flag: large procurement-ceiling figures (such as a 200-vehicle order) are orders, not delivered counts. It is defense procurement; there is no consumer price.

Readiness

REMUS (100 / 300 / 620) is internal use only (not for retail), no capability claims are on file, the model has no verified field deployments in the registry, and no incidents are on record.

Availability

internal-only

Internal use only (not for retail).

see evidence →

Price honesty

no-price

No price points on file for REMUS (100 / 300 / 620).

see evidence →

Capability honesty

no-claims

No reviewed capability claims on file for REMUS (100 / 300 / 620).

see evidence →

Real-world use

production

Maturity: production. No verified deployments in the registry.

see evidence →

Safety record

no-incidents

No incidents on record. No verified deployments either.

What it claims to do

No reviewed capability claims on file.

Price

No reviewed price points on file.

Real-world use

No verified deployments on file for REMUS (100 / 300 / 620).

Safety record

No incidents on record. No verified deployments either, so the absence is uninformative.

Privacy

No privacy practices disclosed or on file for REMUS (100 / 300 / 620).

Specs

notes

[{"label":"Verified (legacy-prime contrast)","value":"Huntington Ingalls Industries (NYSE: HII; America's largest military shipbuilder, ~42,000+ employees) makes the REMUS UUV family via its Mission Technologies division. Acquired via Hydroid Inc. ($350M, closed Mar 26 2020, bought from Norway's Kongsberg). The legacy-prime contrast to the new-defense maritime startups (Saronic/Anduril). maturity=production / mature-fielded (highest of the maritime set)."},{"label":"Verified contracts/fielding (strongest signals)","value":"Up to ~200 REMUS-class UUVs order (ceiling); REMUS 620 NOAA order (2 units, delivered 2024); REMUS 620 international order (unnamed Indo-Pacific, Mar 2024). OPERATIONAL FIELDING (strongest): Jun 2025 'Yellow Moray' - first forward-deployed torpedo-tube launch-and-recovery of a REMUS 600 from USS Delaware (SSN-791), 3 fully autonomous launch/recovery sorties (Navy + WHOI). New DIU contract for the submarine Torpedo Tube Launch and Recovery (TTLR) system."},{"label":"AI-substance: production-grade / proven","value":"REMUS autonomy is decades-mature and operationally demonstrated (lowest claimed-vs-verified risk in the maritime set). Less 'AI-first' marketing, more demonstrated autonomous launch/recovery from a deployed submarine."},{"label":"Claimed but NOT verified","value":"TTLR/DIU contract value (undisclosed); exact total REMUS 620 fleet delivered; the full quantity actually delivered under the 'up-to-200' ceiling (ceiling != delivered); REMUS 620 depth/dimensions (not in primary source)."}]

specs

REMUS family (REMUS 100/300/600/620): autonomous undersea vehicles for MCM, hydrographic survey, ISR, EW. REMUS 620 (introduced 2022): newer medium-class long-endurance UUV, up to 110 hr endurance, 275 nm range. Built by HII's Mission Technologies division (Unmanned Systems group). REMUS lineage dates to 2001 (Hydroid/WHOI heritage).

formFactor

maritime (autonomous SUBSEA vehicle / UUV family; defense + commercial; legacy prime)

What's under the hood

No brain on file for REMUS (100 / 300 / 620).

Frequently asked questions

Is the REMUS (100 / 300 / 620) actually available for purchase?

Not available to consumers. In internal use by Huntington Ingalls Industries.Source: HII $350M Hydroid (REMUS) acquisition from Kongsberg (closed Mar 26 2020)

What does the REMUS (100 / 300 / 620) cost?

Not announced.

Where is the REMUS (100 / 300 / 620) being used?

No verified field deployments on record.

Is the REMUS (100 / 300 / 620) safe?

No incidents on record, but with no verified field deployments either, the absence is uninformative.

How does the REMUS (100 / 300 / 620) handle privacy?

No privacy practices disclosed or on file for REMUS (100 / 300 / 620).

Who makes the REMUS (100 / 300 / 620)?

REMUS (100 / 300 / 620) is made by Huntington Ingalls Industries, based in Newport News, Virginia, USA.Source: HII $350M Hydroid (REMUS) acquisition from Kongsberg (closed Mar 26 2020)

Compared to

• Dive-LDby Anduril Industries · maritime
• Saronic USV (Corsair / Mirage / Marauder)by Saronic Technologies · maritime
• Saildrone USV (Explorer / Voyager / Surveyor)by Saildrone · maritime

Sources

1. HII $350M Hydroid (REMUS) acquisition from Kongsberg (closed Mar 26 2020) · https://news.usni.org/2020/02/04/hii-ceo-350m-deal-for-uuv-maker-hydroid-keeps-shipbuilder-in-line-with-navy-demand ↗
2. HII Yellow Moray: first sub torpedo-tube launch/recovery of REMUS 600 from USS Delaware (2025) + TTLR deal · https://www.navalnews.com/naval-news/2026/04/hii-builds-on-submarine-mum-t-success-with-new-pentagon-deal/ ↗
3. HII REMUS 620 (110 hr endurance, 275 nm range); NOAA order · https://www.hii.com/news/hii-remus-620-unmanned-underwater-vehicle-noaa-2023 ↗
4. HII contract for up to ~200 REMUS-class UUVs · https://maritime-executive.com/article/huntington-ingalls-wins-contract-for-up-to-200-unmanned-sub-drones ↗