SEACORP LLC, based in Middletown, Rhode Island, received a $31,953,501 cost-plus-fixed-fee indefinite-delivery, indefinite-quantity contract on May 7, 2026, for the development of payload control system technology in support of Navy submarines. The Naval Undersea Warfare Center Division in Newport, Rhode Island, is the contracting activity under contract number N66604-26-D-C600. The five-year ordering period runs through May 2031, with work performed in Middletown, Rhode Island (40%), Newport, Rhode Island (31%), the United Kingdom (4%), Australia (4%), and multiple other U.S. locations including San Diego, Hawaii, and Groton.
SBIR Phase III and Sole-Source Award
The contract was awarded as a Small Business Innovative Research Phase III sole-source agreement, exempt from competitive procurement requirements under 10 U.S.C. § 3204(a)(5). The SBIR program moves technology through three phases: Phase I funds feasibility studies and early concept work, Phase II funds prototype development and demonstration, and Phase III transitions SBIR-developed technology into product development or government use using non-SBIR funding from the operating program offices that want to incorporate it. The sole-source authority attached to Phase III awards allows agencies to contract directly with the Phase I and II performer without competition because that company possesses the specific intellectual property and technical knowledge generated by the prior phases, knowledge that no other contractor could independently replicate without conducting equivalent prior work at its own expense.
For SEACORP, the Phase III award reflects years of prior Navy-funded SBIR investment in payload control technology that has matured to the point where NUWC Newport is ready to move it toward operational integration. The cost-plus-fixed-fee contract type is appropriate for the continued engineering development work that Phase III entails: the integration challenges, testing requirements, and technical risks associated with maturing a novel payload control approach into a system suitable for operational use make fixed-price contracting inappropriate, and the government’s strong interest in successfully developing this capability makes it preferable to share technical risk with the contractor rather than demand that SEACORP absorb all schedule and cost uncertainty on its own.
Payload Control Systems for Submarines
Payload control systems are the onboard hardware and software that manage the preparation, launch sequencing, guidance data upload, and status monitoring of weapons and other payloads carried by a submarine. Modern attack submarines carry a diverse inventory of weapons — Tomahawk cruise missiles, anti-ship missiles, torpedoes, and increasingly unmanned undersea vehicle payloads — each of which has distinct preparation sequences, launch constraints, and real-time monitoring requirements during the engagement timeline. The payload control system serves as the centralized management layer that allows submarine operators to work with this mixed inventory efficiently and safely, integrating weapons status data with tactical information from the combat management system to support targeting and employment decisions under the time pressure of an actual or simulated engagement.
As the Navy’s submarine payload portfolio evolves, payload control technology must keep pace with new system types that legacy architectures were not designed to accommodate. Unmanned undersea vehicles that operate autonomously after launch and may require monitoring or retasking during their mission create control interface requirements that differ fundamentally from the launch-and-forget model that traditional torpedo and missile employment follows. Long-range precision strike weapons with in-flight retargeting capability similarly require two-way communication and status management during flight rather than only pre-launch preparation. SEACORP’s work addresses these evolving requirements, developing payload control technology that can manage a broader range of submarine-launched systems with the reliability and safety assurance that operating in the submarine environment demands.
International Work Locations and AUKUS Context
The allocation of four percent of contract work to the United Kingdom and four percent to Australia is unusual for a domestic SBIR award and reflects the program’s connection to the trilateral AUKUS security partnership. AUKUS, which involves advanced capability cooperation among the United States, the United Kingdom, and Australia with a particular emphasis on submarine and undersea warfare technology, has generated a growing body of collaborative development work in the submarine domain. Work performed in allied nation locations on a Navy submarine systems development contract is consistent with the interoperability alignment and requirements integration work that takes place when systems are intended for operation aboard submarines of multiple allied navies rather than exclusively for U.S. Navy platforms.
If the payload control technology developed under this contract is intended to operate on allied submarines alongside U.S. Navy boats in joint operations or coalition scenarios, having allied nation engineers and integrators participate in the development process from an early stage builds the common understanding of system architecture, interface standards, and operational protocols that effective interoperability requires. Getting allied partners involved during development is far more effective than attempting to achieve interoperability after separate national systems have been fielded with different design assumptions and interface standards that must then be bridged through expensive and time-consuming adaptation work.
NUWC Newport and SEACORP’s Local Partnership
The Naval Undersea Warfare Center Division Newport is the Navy’s corporate research laboratory and in-service engineering agent for submarines, autonomous undersea systems, and related undersea warfare technology. NUWC Newport manages submarine combat system development and integration programs, making it the natural contracting activity for a submarine payload control development contract. SEACORP’s geographic base in Middletown — directly adjacent to Newport — facilitates the close daily working relationship between company engineers and NUWC Newport technical staff that complex systems development requires. The 40 percent Middletown and 31 percent Newport work shares reflect this concentrated local collaboration, with the majority of the contract’s engineering effort located within a few miles of the contracting activity and the government’s principal technical workforce.
Contractors
SEACORP LLC, based in Middletown, Rhode Island, is the sole-source prime contractor for this SBIR Phase III award. Contract value: $31,953,501. Ordering period: five years through May 2031. Work locations: Middletown, RI (40%), Newport, RI (31%), United Kingdom (4%), Australia (4%), and San Diego, Hawaii, Groton, and other U.S. sites. Contracting activity: Naval Undersea Warfare Center Division, Newport, Rhode Island (N66604-26-D-C600).
