SLCM-N: Navy Awards $743.6M for Nuclear Cruise Missile Prototypes
The Navy awarded $743.6 million in SLCM-N prototype OTAs on Sept. 23, 2026, splitting missile and canister work among five firms through Dec. 31, 2027.
On 6 October 2026, Navy Strategic Systems Programs (SSP) announced five prototype Other Transaction Authority (OTA) agreements for the Nuclear-Armed Sea-Launched Cruise Missile (SLCM-N), Naval Today reported. The agreements were awarded on 23 September 2026. Their combined value is $743,567,499.68, with work scheduled through 31 December 2027, according to Defense WarRoom and ExecutiveGov.
The package covers flight-system integration and missile development on one track and canister development on another. It follows earlier 2025 awards for preliminary design and for Virginia Payload Tube launcher and canister work. Official SSP pages that host the announcement return errors to automated fetches; this article relies on trade and specialist outlets that published the Navy figures.
What the awards cover
Naval Today and ExecutiveGov list the same five awardees and the same S2MARTS OTA vehicle, managed by NSTXL. Defense WarRoom published the combined dollar total to the cent.
| Role | Company | Notes | Source |
|---|---|---|---|
| Flight system / missile | Leidos Dynetics | Prototype OTA under S2MARTS | Naval Today, ExecutiveGov |
| Flight system / missile | Raytheon | Prototype OTA under S2MARTS | Naval Today, ExecutiveGov |
| Flight system / missile | Northrop Grumman Defense Sector | Prototype OTA under S2MARTS | Naval Today, ExecutiveGov |
| Canister | Northrop Grumman Mission Systems | Prototype OTA under S2MARTS | Naval Today, ExecutiveGov |
| Canister | Pacific Engineering | Prototype OTA under S2MARTS | Naval Today, ExecutiveGov |
| Combined value | Five agreements | $743,567,499.68; awarded 23 Sept 2026; work through 31 Dec 2027 | Defense WarRoom, ExecutiveGov |
| Vehicle | S2MARTS OTA / NSTXL | Navy solicitation and management path reported by trade press | Naval Today |
Table compiled by Peter’s World from the sources linked in each row.
In August 2025, according to ExecutiveGov, the Navy had selected Leidos, Raytheon, Lockheed Martin, Northrop Grumman and Florida Turbine Technologies for earlier preliminary work. Lockheed Martin and Florida Turbine Technologies do not appear on the September 2026 awardee list. Defense WarRoom noted that the Navy has not publicly said why those two firms dropped off. Separately, on 26 September 2025 the Navy awarded about $26.24 million to Northrop Grumman Mission Systems and Pacific Engineering for Virginia Payload Tube integration of the launcher and canister, that outlet reported.
Background and program history
The Congressional Research Service (CRS IF12084, updated 8 January 2026) traces SLCM-N to the Tomahawk Land Attack Missile-Nuclear (TLAM-N). CRS says TLAM-N had a range of about 2,500 kilometers (roughly 1,550 miles), was withdrawn from ships after the Cold War, and was fully retired in 2013 after the 2010 Nuclear Posture Review called it redundant.
The 2018 Nuclear Posture Review proposed a new nuclear-armed sea-launched cruise missile as a longer-term regional option alongside the near-term W76-2 low-yield warhead on Trident D5. The 2022 Nuclear Posture Review under the Biden Administration proposed cancelling SLCM-N, arguing it was no longer necessary given the W76-2. Congress kept funding the missile and its warhead anyway.
Section 1640 of the FY2024 National Defense Authorization Act required the Defense Department to establish a major defense acquisition program for SLCM-N, begin altering the W80-4 warhead for the missile, and ensure initial operational capability no later than 30 September 2034, CRS reports. The FY2025 NDAA gave flexibility to pick an alternative warhead in the W80 family. FY2025 reconciliation legislation included $2 billion to accelerate the missile and $400 million for the warhead. For FY2026, CRS says the Navy assumed about $1.92 billion in mandatory funding and requested no discretionary program-element dollars; the FY2026 NDAA authorized $210 million for the missile and $50 million for the warhead. Section 1633 of that act requires a limited operational deployment no later than September 2032.
Key program facts
- Predecessor: TLAM-N, range about 2,500 km (~1,550 mi); retired 2013 (CRS IF12084).
- Platform path: Virginia-class attack submarines; SSP has studied integration, including Virginia Payload Tube launcher and canister work (CRS; Defense WarRoom on the Sept 2025 VPT awards).
- Warhead: W80 warhead family; FY2024 NDAA directed a W80-4 alteration, with later flexibility for an alternative (CRS). Defense WarRoom reported that Sandia and Lawrence Livermore National Laboratory officials said in January 2026 a W80-5 variant will arm SLCM-N; CRS itself does not confirm a W80-5 designation.
- IOC: no later than 30 September 2034 (FY2024 NDAA Sec. 1640, per CRS).
- Limited operational deployment: not later than September 2032 (FY2026 NDAA Sec. 1633, per CRS).
- CBO cost estimate: about $10 billion for 2023–2032 if the program began in 2024, excluding production after 2032 and excluding integration, storage and operations (CRS, citing CBO July 2023).
- Recent prototype package: $743,567,499.68 combined OTA value, five agreements, work through 31 December 2027 (Defense WarRoom, ExecutiveGov).
Why it matters
Peter’s World analysis, based on the sources cited in this article.
SLCM-N sits in the sea leg of U.S. nuclear modernization alongside the Columbia-class ballistic missile submarine, while the land leg is being rebuilt with the Sentinel ICBM and the air leg with systems such as the B-21 Raider. CRS frames the core policy fight as whether a nuclear cruise missile on attack submarines adds credible regional deterrence and assurance for allies, or whether it duplicates existing options and crowds out conventional strike capacity on Virginia-class boats.
The September 2026 prototype awards move the program from paper requirements into competing hardware designs. In our view, that makes the next milestones—downselect, warhead maturity under the W80 family, and Virginia Payload Tube integration—more important than another round of authorization language. Schedule pressure is already written into statute: limited deployment by September 2032 and IOC by September 2034 leave little room if prototypes slip.
What to watch: which missile and canister designs survive prototype evaluation; whether Lockheed Martin or others re-enter later phases; NNSA progress on the W80-family warhead; and how Virginia-class payload tradeoffs are resolved as Columbia deliveries and Sentinel silo work continue on parallel clocks.
Sources
- Congressional Research Service, Nuclear-Armed Sea-Launched Cruise Missile (SLCM-N) (IF12084), updated 8 January 2026 (also EveryCRSReport mirror).
- Naval Today, US Navy picks companies for nuclear-armed cruise missile prototypes, 9 October 2026.
- ExecutiveGov, Navy Awards SLCM-N Prototype OTA Agreements, 7 October 2026.
- Defense WarRoom, Navy SLCM-N Prototype Awards, 8 October 2026.
Additional sources
- Army Recognition: US Navy awards $743 million for SLCM-N, 9 October 2026: corroborates the package size and deterrence framing; schedule claims in that piece should be checked against CRS and Navy-reported dates.
- Navy Strategic Systems Programs public news pages: trade outlets above report the 6 October 2026 announcement; direct SSP article URLs returned access errors to automated fetches during research for this post.
