USSOCOM SBIR SOC26BZ06-DV006: RIPTIDE, Resilient Integrated Photonic Transport in Denied Environments
Quick Answer
SOC26BZ06-DV006, called RIPTIDE, is a Direct to Phase II SBIR topic from United States Special Operations Command under the FY26 SBIR Broad Agency Announcement, Release 6. USSOCOM wants a laser crosslink payload small enough for a Group 3 unmanned aircraft that simultaneously carries data, transfers time, finds direction, and measures range, so that a chain of eight to twelve aircraft spanning 200 to 300 nautical miles can navigate without GPS. The SBIR award maximum is $1,500,000 not to exceed, with up to $25,000 in Technical and Business Assistance for an overall maximum of $1,525,000, over a period of performance not to exceed 18 months. The topic opens September 23, 2026 and closes October 21, 2026 through the Defense SBIR/STTR Innovation Portal.
The technical requirement is stated precisely and it is demanding. The swarm shall maintain a navigation accuracy of 8 to 11 meters circular error probable, or better, at the most distant node of a distributed formation spanning 200 to 300 nautical miles over feature-sparse terrain, with the formation anchored to land-based references at one end and extending beyond visual navigation range at the other.
Before any of the technology, understand that USSOCOM disqualifies proposals for more reasons than any other component in this cycle, and several of those reasons have nothing to do with technical merit. A Government Letter of Support makes your proposal non-responsive. Subcontractor costs without copies of the subcontract agreements make it non-responsive. A consultant without an agreement letter makes it non-responsive. A missing Feasibility Appendix, a price above the ceiling, or a work share below 50 percent by an explicit formula all stop the evaluation. Those are covered in their own section below, and they deserve reading before you write a word.
One more thing to notice early. The Phase I feasibility study, which is prior work you must already have completed, is described as culminating in fabrication of a prototype payload and demonstration of a single optical flight link validating acquisition, precision tracking, and single-link state exchange. That is not a paper study. If you have not flown an optical link, read that sentence carefully before committing.
Topic At a Glance
Topic number: OSW26TZ06-NV010
Title: Architected Energy Dissipation Structures With Tunable Rigid-Flexible Behaviors
Agency: Office of the Secretary of War, Basic Research, administered by the OUSW(R&E) Science and Technology Foundations STTR Program
Solicitation: OSW Basic Research 2026 Small Business Technology Transfer Broad Agency Announcement, Release 6, Proposal Submission Instructions
Program type: Phase I
Award: must not exceed $250,000
Period of performance: 12 months
Technical volume: not to exceed 15 pages. Technical volumes exceeding 15 pages will be deemed non-compliant and will not be evaluated
Component Technology Priority Area: Advanced Materials
Critical Technology Area: Contested Logistics Technologies
Projected CMMC level requirement: Level 1
Export control status: no topic-level ITAR or EAR restriction paragraph appears on this topic, and none appears on any of the seven topics in this release
Classification: Phase I and Phase II efforts are expected to be performed at the Unclassified level
Material class: polycatenated architected materials, essentially 3D chainmail, realized through additive manufacturing
Phase I specimen geometry: an approximate rectangular configuration of 82 mm by 87 mm by 19.5 mm thickness, approximating a commonly tested helmet pad configuration
Conformability requirement: architected sheets shall display conformability to various geometries including features with radii of curvature ranging from approximately 0.5 to 3.0 centimeters
Mechanical objectives: maximize energy absorption efficiency in through-thickness compression as described in Equation 1 of the cited Clough reference, while minimizing shear stiffness in the thickness direction
Phase I specimen count: a minimum of 10 test specimens
Phase I impact testing: across the range of 1 to 50 joules, using legacy foam pads as a comparison
Phase II specimen count: a minimum of 20 specimens in the Phase I geometrical configuration
Government collaboration: teams will be expected to work alongside Army scientists and engineers, and in Phase II will work with Army Research Laboratory scientists to design, manufacture, and deliver test specimens for advanced dynamic mechanical testing at ARL
Research institution partner: required, as with all STTR awards, along with a written allocation of rights agreement if selected
Phase II structure: a 10 to 12 month base period not to exceed $1,000,000 plus a 10 to 12 month option period not to exceed $1,000,000, with the entire Phase II effort not exceeding $2,000,000
Technical and Business Assistance: Phase I up to $6,500, Phase II up to $50,000 per project, in addition to the cost ceilings and not subject to profit or fee, using the mandatory SBIR/STTR TABA Request Form in Volume 5
Percentage of Work: deviations from the POW requirements are not permitted
Company Commercialization Report: information contained in the CCR will not be considered by S&T Foundations during proposal evaluations
Topic open date: September 23, 2026
Proposal deadline: October 21, 2026
Submission portal: DSIP at dodsbirsttr.mil
Keywords: conformable structures, lightweight armor, Soldier protection, metamaterial, architected material, additive manufacturing
What the Program Is For, Which Shapes How You Write
The S&T Foundations STTR Program has a purpose distinct from most SBIR and STTR programs, and it is stated plainly.
The program aims to facilitate the transition of basic research to applied research by collaborations between academic researchers and small businesses, as well as stimulating technological innovation, strengthening the role of small business in meeting DoW research and development needs, fostering and encouraging participation by minority and disadvantaged persons in technological innovation, and increasing the commercial application of DoW-supported research or research and development results.
The program focuses on exploiting scientific discoveries from the DoW basic research programs and providing a mechanism to further scientific development, maturation, and commercialization. High-risk with potential for high-reward approaches are sought in addressing the scientific challenges described in the topics. These approaches should be stimulated by early research in academia supported by DoW basic research programs.
The consequence for your technical volume
In addition to the Phase I proposal content specified in the DoW STTR BAA, this program requires a narrative description of how early research in academic labs will be transitioned to the small business via this opportunity.
The Phase I Technical Proposal must also include a preliminary Phase II Plan specifying the overall vision, approach, and potential product proposed at the end of Phase II.
Both must be included within the 15-page limit.
So the technical volume carries three things a standard Phase I proposal would not: the transition narrative, the preliminary Phase II Plan, and the usual Phase I technical content, all in fifteen pages. Plan the page budget before you draft.
What the Topic Is Actually Asking For
The objective
Develop and demonstrate architected energy dissipation structures with rigid responsiveness at large tensile, compressive, and shear strains, but capable of conformability to surfaces of complex topographies and other fluid-like behaviors in response to small strains.
The strain-dependent behavior is the whole idea. Rigid at large strain, fluid-like at small strain. That inversion of ordinary material behavior is what polycatenated structures make possible and what no conventional material offers.
The problem
The Department requires lightweight protection materials for a variety of applications, including personal protection, vehicle safety, and shielding sensitive electronics.
Most protection structures are either rigid materials, for example metals, ceramics, and composites, designed to carry significant mechanical loads or blunt kinetic threats, or flexible materials, for example elastomers, foam structures, and structures based on polymeric fibers, intended to compress or stretch, which are conformable and effective at reducing peak accelerations.
However, most protection solutions cannot provide both rigid material response and conformability, which limits applications for the Warfighter.
That is a real and familiar tradeoff. A rigid plate spreads load and stops penetration but does not follow the body. A foam pad conforms and reduces peak acceleration but offers little structural resistance. The Warfighter carries both, at weight and bulk cost.
The enabling discovery
Recently, a new family of energy dissipating structures known as polycatenated architected materials has been introduced that may display both solid-like and fluid-like behaviors.
These structures, essentially 3D chainmail and realized through additive manufacturing, derive their mechanical behaviors not through intrinsic material properties, but rather through geometric arrangement of internal solid elements, for example rings or cage-like particles interconnected into 3D networks. Note that these materials consist entirely of solid linkages, collectively displaying fluid-like behaviors in response to small deformations.
In response to severe loading, rigid elements may align and develop complex force chains that exhibit high strength and offer significant protection mechanisms not possible through conventional flexible options.
However, elements may also reorganize, slide, or rotate, which offers novel design mechanisms for dissipating energy, and new ways to enable comfort for applications related to personal protection.
Two mechanisms, and they are worth distinguishing because they are the levers you design against. Force chain formation under severe load is where the strength comes from, and it depends on element geometry and how elements interlock when they align. Element reorganization, sliding, and rotation is where the dissipation and the conformability come from, and it depends on linkage clearance and friction.
The phrase "consist entirely of solid linkages" is doing real work. There is no fluid, no fill, no phase change. The fluid-like response is purely geometric, which is what makes the material manufacturable in one additive build and what makes it robust.
The design task
The goal of this topic is to create architected structures with tunable mechanical energy dissipating behaviors that can vary spatially throughout the material.
Teams will investigate element and linkage materials, geometries, and nearest neighbor spacings to design architected structures that perform optimally for various static and dynamic loading conditions, for example via tensile, compression, impact, and rheology characterization.
Teams will then design, process, characterize, and simulate energy dissipating behaviors of materials in multiple geometrical configurations, for example through comparisons to legacy impact attenuating materials like foams that are used for impact protection such as knee pads, elbow pads, and helmet pads.
Teams will be expected to work alongside Army scientists and engineers to guide the design, manufacturing, and testing of materials.
If successful, this effort would enable new materials design tools for the Department to create customized protection structures for the expeditionary Soldier.
Three design variables are named: element and linkage materials, geometries, and nearest neighbor spacings. Four characterization modes are named: tensile, compression, impact, and rheology. The inclusion of rheology is notable and appropriate, because a material with fluid-like small-strain behavior genuinely has rheological properties, and measuring them is how you quantify the conformability side.
Note also "vary spatially throughout the material." Spatial tunability is the Phase II objective, and it is what turns a material into a design tool: stiffer where load must be carried, more compliant where the body needs to move.
And note that working alongside Army scientists and engineers is stated as an expectation in Phase I, becoming a specific Army Research Laboratory collaboration in Phase II.
Phase I Requirements
Design architected structures with individual linked grains in the following approximate rectangular configuration: 82 mm by 87 mm by 19.5 mm thickness. The given geometry approximates a commonly tested helmet pad configuration and will allow teams to make comparisons to known technologies.
Architected sheets shall display conformability to various geometries including features with radii of curvature ranging from approximately 0.5 to 3.0 centimeters.
The through-thickness compression response of the material should seek to maximize energy absorption efficiency as described in Equation 1 of reference 4. Simultaneously, the material should minimize shear stiffness in the thickness direction.
Teams will use advanced processing techniques, for example additive manufacturing approaches, to fabricate a minimum of 10 test specimens.
Teams will perform computer simulations and initial experimental mechanical characterization to estimate in-plane and out-of-plane loads required to initiate solid-to-fluid transitions in the architected materials.
Teams will perform impact tests across the range of 1 to 50 joules and use legacy foam pads as a comparison.
Reading this scope
This is the most prescriptive Phase I in the release, and that is helpful. A fixed specimen geometry, a fixed specimen count, a fixed energy range, a named comparison baseline, and a named equation for the figure of merit. Very little is left to interpretation, which means the evaluation will turn on how well you execute rather than on how you scoped it.
The 82 by 87 by 19.5 millimeter geometry is deliberately a helmet pad, and the topic says so: it will allow teams to make comparisons to known technologies. The first cited reference is an Army Research Laboratory technical report on improving Advanced Combat Helmet low-velocity impact performance through pad material response optimization, which is almost certainly where that geometry and the comparison baseline come from. Read it.
The radius of curvature range of 0.5 to 3.0 centimeters is tight. Conforming to a 5 millimeter radius with a 19.5 millimeter thick structure is a demanding bend, and it constrains your element size and linkage clearance directly. Work that geometry out early, because it may be the binding constraint on your architecture.
The two mechanical objectives pull against each other in a productive way: maximize energy absorption efficiency in through-thickness compression while minimizing shear stiffness in the thickness direction. Compression stiffness and shear compliance in the same structure is exactly the rigid-plus-conformable combination the objective describes, expressed as two measurable quantities. Note that the energy absorption efficiency definition is specified by equation rather than described, so use that equation and cite it.
The 1 to 50 joule impact range spans a wide dynamic regime, from a light bump to a substantial blunt impact. Fifty joules is in the neighborhood of helmet impact test energies, and 1 joule probes the low-strain fluid-like regime. Testing across both is how you demonstrate the strain-dependent transition.
And the solid-to-fluid transition loads, in-plane and out-of-plane, are a named Phase I output to be estimated through both simulation and initial experiment. That transition threshold is the single most characteristic number of this material class, and it is what a designer would tune.
Phase II and Phase III, For Planning Purposes
Phase II
Design and demonstrate architected structures with variable energy dissipating properties with respect to spatial position. Teams may consider multi-material or variable grain and linkage architectures to achieve the tunable behaviors.
Process a minimum of 20 specimens in the geometrical configurations provided for Phase I and develop test techniques to assess the response of structures whose energy dissipation behaviors vary spatially.
Simulate the mechanical behaviors of the architected structures in response to compressive, tensile, shear, and impact loads. Determine loads required to initiate flexible-rigid transitions at various spatial positions within the structure.
Work with Army Research Laboratory scientists to design, manufacture, and deliver test specimens for advanced dynamic mechanical testing at ARL.
Develop commercial and outreach plans to market the technology for civilian and defense markets, and develop plans to scale manufacturing.
Two things to plan for now. Spatial variation is the Phase II leap, and the topic names two routes: multi-material builds, or variable grain and linkage architectures within a single material. The second is more manufacturable in a single additive build and is arguably the more elegant answer.
And delivering specimens to ARL for advanced dynamic mechanical testing is a concrete transition step with a named laboratory. Your specimens will be tested by someone else on their equipment, which argues for conservative claims, well-documented specimen fabrication, and enough specimen count to send parts away. Note that Phase II asks for a minimum of 20 specimens partly for that reason.
Note also that developing test techniques to assess spatially varying response is itself a Phase II deliverable. Standard mechanical test methods assume a homogeneous specimen, and a structure whose properties vary across its area needs new measurement approaches. That is a real research contribution and it is easy to underplan.
Phase III
The discovery of polycatenated mechanical metamaterials has introduced a new family of structures that may display both solid-like and fluid-like behaviors. The additional degrees of freedom associated with granular elements linked to nearest neighbors may enable a variety of new civilian and defense technologies, for example Soldier and vehicle protection, sports equipment, law enforcement, and lightweight concepts for dissipating vibrational energy.
Phase III efforts shall include outreach efforts based on market research to leverage opportunities in both civilian and defense markets. Implement plans to rapidly modify designs for specific customer needs. In addition, teams shall implement plans to scale manufacturing.
The commercial case here is unusually strong for a defense materials topic, because the helmet pad geometry the topic specifies is shared with sports equipment. Football, cycling, hockey, and motorsport helmet padding is a large existing market with active regulatory pressure on impact performance and a demonstrated willingness to pay for better protection. Law enforcement and industrial protective equipment follow the same path.
The vibrational energy dissipation application is a different and broader market, covering equipment mounts, electronics isolation, and machinery, and it exploits the same small-strain fluid-like behavior from a different direction.
The STTR Partnership and Allocation of Rights
This is an STTR, so a formal partnership with a research institution is a condition of the award rather than a feature of your approach.
If a small business concern is selected for an STTR award, they must negotiate a written agreement between the small business and their selected research institution that allocates intellectual property rights and rights to carry out follow-on research, development, or commercialization. The instructions point to the Model Agreement for the Allocation of Rights.
STTR awards also carry statutory minimum work shares: the small business must perform at least 40 percent of the work and the single partnering research institution at least 30 percent. The OSW Basic Research instructions direct proposers to follow all general instructions in the DoW STTR Program solicitation, which is where those requirements live. Read that document, not only this one.
What the split looks like on this topic
The natural division follows design and science against processing and testing. The research institution owns the mechanics: the simulation of force chain formation and element reorganization, the parametric design of element geometry and nearest neighbor spacing, the theory of the solid-to-fluid transition, and the rheological characterization, since granular and architected material mechanics is where that expertise lives. The small business owns the manufacturing and evaluation: additive process development, specimen fabrication at count, impact and compression test execution against legacy foam baselines, the ARL specimen delivery relationship, and manufacturing scale-up.
Because the enabling discovery is a 2025 Science paper and the field is very new, the institution's contribution is substantive. Name the institution, the faculty principal investigator, the additive equipment and mechanical test capability, and the tasks. Note that the topic also expects teams to work alongside Army scientists and engineers from Phase I onward, so the government is a third participant in the technical work rather than only a customer.
Note that the program instructions ask you to plan carefully for research involving animal or human subjects, biological agents, and similar elements, and warn that the short duration of a Phase I effort may preclude such plans unless coordinated before a contract is awarded.
The Phase II Submission Window, Which You Must Plan For Now
This program mechanic catches first-time applicants and it deserves its own section.
Phase II proposals may only be submitted by Phase I awardees. All Phase I awardees are eligible to submit a Phase II proposal. Phase II selections are based, in large part, on the success of the Phase I effort, so it is vital for small business concerns to discuss the Phase I project results with their Technical Point of Contact.
The 30-day window to submit a Phase II proposal is expected to commence 6 to 9 months into the Phase I period. The details on the due date, content, and submission requirements will be provided to Phase I awardees by the S&T Foundations STTR Program Management Office via subsequent notification.
This will be the only opportunity to submit a Phase II proposal for the Basic Research topics. The S&T Foundations STTR Program cannot accept proposals outside the established Phase II submission dates, and proposals received at any other time will not be evaluated.
Phase II proposals are expected to be structured as a 10 to 12 month base period not to exceed $1,000,000 plus a 10 to 12 month option period not to exceed $1,000,000, with the entire Phase II effort not exceeding $2,000,000.
Why this changes your Phase I plan
The Phase II window opens 6 to 9 months into a 12-month Phase I. You will be writing your Phase II proposal while the Phase I effort is still running, arguing Phase II merit on partial results.
Structure the Phase I schedule so your most persuasive results land in the first six months, and say in your Phase I plan what will be complete by then. Establish the Technical Point of Contact relationship early in performance, because the program says discussing Phase I results with the TPOC is vital and the missed window is unrecoverable.
Funding, Cost Structure, and Program Mechanics
The award
The Phase I amount must not exceed $250,000 over a period of 12 months. The Government anticipates making multiple Phase I awards under this topic, subject to the availability of funds and the receipt of meritorious proposals.
Note also that due to limited funding, S&T Foundations reserves the right to limit awards under any topic.
The 15-page limit is a hard compliance gate
The technical volume is not to exceed 15 pages and must follow the formatting requirements provided in the DoW STTR Program BAA. Technical volumes exceeding 15 pages will be deemed non-compliant and will not be evaluated.
Note the phrasing. Not "pages in excess will not be considered," which is what several other components say. Non-compliant and not evaluated. An over-length technical volume loses the whole proposal, not the extra pages. Count the pages before you submit, and remember that the transition narrative and the preliminary Phase II Plan both sit inside the limit.
Percentage of Work
Review the updated Percentage of Work calculation details included in the DoW Program BAA. Deviations from the POW requirements are not permitted.
With a research institution performing at least 30 percent of the work, your POW arithmetic needs to be right before you finalize the subaward. Model it first.
Technical and Business Assistance
Phase I awardees may request up to $6,500 in TABA funding. Phase II awardees may request up to $50,000 per Phase II project. TABA funding is in addition to the Phase I and Phase II cost ceilings and is not subject to profit or fee.
All requests for TABA must be completed using the SBIR/STTR TABA Request Form, and the completed form must be included in Volume 5 of the proposal submission in DSIP. OSW will not accept requests for TABA that do not utilize the form or that are not included as a submission document in Volume 5.
The form requirement is absolute. For this topic, manufacturing scale-up consulting is the standout use, since Phase II requires plans to scale manufacturing and Phase III requires implementing them, and additive manufacturing of interlinked structures at production volume is a genuine process engineering problem. Commercial market development is a close second, given the strong sports equipment and protective equipment adjacency the topic identifies.
The Company Commercialization Report is not evaluated
Completion of the CCR as Volume 4 is required, but information contained in the CCR will not be considered by S&T Foundations during proposal evaluations. Complete it because it is required, and put your commercialization effort into the technical volume instead, where it is scored.
Evaluation criteria, in stated order of importance
This is one of the most useful things in the OSW Basic Research instructions.
All proposals will be evaluated in accordance with the evaluation criteria listed in the DoW solicitation. The criteria will be in descending order of importance with technical merit, soundness, and innovation of the proposed approach being the most important, followed by qualifications of key personnel, and then followed by commercialization potential.
Evaluation of the Phase I proposal will include an assessment of not only the feasibility studies planned for Phase I but the overall approach and product proposed at the end of Phase II.
Awards will be made on the basis of technical evaluations using the criteria described in the DoW Solicitation and availability of S&T Foundations STTR funds.
Three things follow. Technical merit dominates, so that is where your pages belong. Key personnel ranks second, ahead of commercialization, which means naming the right people matters more than the market analysis. And the preliminary Phase II Plan is not a formality, because the evaluation explicitly assesses the overall approach and product proposed at the end of Phase II.
Only Government personnel will evaluate proposals, with the exception of personnel from Strategic Analysis, Inc who provide programmatic and administrative assistance for all topics.
Notification and debriefings
Proposing firms will be notified of selection or non-selection status for a Phase I award within 90 days of the closing date of the topic. Notifications will be issued through DSIP to both the firm's Corporate Official and Principal Investigator of record. Ninety days from October 21, 2026 is approximately January 19, 2027.
Non-selected proposers may request a written debriefing within 30 calendar days of the select or non-select notification, as specified in that notification. Debriefs are typically provided in writing via email to the Corporate Official identified in the firm proposal within 30 days of receipt of the request. Requests for oral debriefs may not be accommodated. If contact information for the Corporate Official has changed since proposal submission, a notice of the change on company letterhead signed by the Corporate Official must accompany the debrief request.
The debriefing provision is genuinely valuable and underused. If you are not selected, a written debrief tells you what to fix, and this program recurs.
Refer to the DoW solicitation for procedures to protest the announcement. As prescribed in FAR 33.106(b) and FAR 52.233-3, protests after award should be submitted to osd.ncr.ousd-r-e.mbx.sbir-sttr-protest@mail.mil.
Foreign nationals, privacy, and classification
If the offeror proposes to employ a foreign national, refer to the DoW Solicitation for definitions and reporting requirements. Ensure no Privacy Act information is included in the submittal.
Phase I and Phase II efforts are expected to be performed at the Unclassified level.
The unclassified expectation matters, because university research groups are typically open-research environments with international students and postdocs. This program is compatible with that, unlike several other components in this cycle, and no topic-level ITAR restriction appears anywhere in this release. Follow the DoW Solicitation reporting requirements for any foreign nationals you propose.
Questions
Specific questions pertaining to the administration of the STTR Program and these proposal preparation instructions should be directed to Jason Day at jason.o.day.civ@mail.mil.
The instructions do not state that DSIP Topic Q&A is unavailable, so the standard DoW STTR Program BAA process applies and Topic Q&A closes to new questions two weeks before the topic closes, on October 7, 2026.
The References
Four, and they are exceptionally well chosen. Two are the enabling discovery, one is the Army baseline, and one supplies the figure of merit you are asked to maximize.
Staniszeski, J., and colleagues, "Improved Low-Velocity Impact Performance of the Advanced Combat Helmet at 17 ft/s through Optimization of Pad Material Response," ARL-TR-8808, September 2019. This is the Army Research Laboratory report on helmet pad optimization, and it is almost certainly where the 82 by 87 by 19.5 millimeter specimen geometry and the legacy foam pad comparison come from. Read it first, because it defines the incumbent you must beat and the test conditions the Army uses.
Zhou, W., and colleagues, "3D polycatenated architected materials," Science 387:6731, 269 to 277, 2025. This is the discovery paper the whole topic rests on. Read it closely, because the element geometries, linkage topologies, and the solid-to-fluid transition behavior it reports are your starting design space.
Liu, T., and colleagues, "3D self-locking granular metamaterial," Science 12(15), 2026. Self-locking is the force chain mechanism under severe load, viewed from the granular materials side.
Clough, E., and colleagues, "Elastomeric Microlattice Impact Attenuators," Matter 1, 1519 to 1531, 2019. This is the reference whose Equation 1 defines the energy absorption efficiency you are asked to maximize. You must have this paper, because the Phase I requirement cites its equation by number rather than restating it.
The set tells you exactly how to write. Ground the design space in Zhou 2025, use Clough 2019 for the figure of merit, and benchmark against the foam pads characterized in the ARL report. A proposal that does those three things is answering the topic in its own terms. A proposal that does not have the Clough equation right has failed a stated requirement.
Note that the Liu citation as printed lists Science with volume 12(15) and a 2026 date, which does not match Science's volume numbering. If you cite it yourself, verify the bibliographic details rather than copying them forward.
Timeline and What to Do When
The dates
Topic opens: September 23, 2026
DSIP Topic Q&A closes: October 7, 2026, two weeks before the topic closes, per the DoW STTR Program BAA
Proposal deadline: October 21, 2026
Selection notification: within 90 days of the closing date, approximately January 19, 2027, through DSIP to both the Corporate Official and the Principal Investigator of record
Debriefing request window: within 30 calendar days of notification
Period of performance: 12 months
Phase II submission window: a 30-day window expected to commence 6 to 9 months into the Phase I period, and the only opportunity
Frequently Asked Questions
What is USSOCOM SBIR topic SOC26BZ06-DV006?
SOC26BZ06-DV006, called RIPTIDE, is a Direct to Phase II SBIR topic titled "Resilient Integrated Photonic Transport in Denied Environments," released under the USSOCOM FY26 SBIR Broad Agency Announcement, Release 6. The objective is applied research toward a capability providing resilient, jam-resistant communications and cooperative navigation for distributed Group 3 UAS formations operating in GPS-denied environments across a theater-scale formation spanning 200 to 300 nautical miles over feature-sparse terrain.
How much funding is available?
The SBIR award maximum is not to exceed $1,500,000, with TABA not to exceed $25,000, for an overall award maximum not to exceed $1,525,000, over a period of performance not to exceed 18 months. Any proposal above the price limit will not be evaluated or considered for award.
When is the proposal deadline?
The topic opens September 23, 2026 and proposals are due October 21, 2026 through the Defense SBIR/STTR Innovation Portal at dodsbirsttr.mil.
Can I submit a Phase I proposal?
No. The USSOCOM instructions cover Direct to Phase II proposals only, and the topics are accepting Direct to Phase II proposals only.
How long can my technical volume be?
Not to exceed 10 pages. USSOCOM will only evaluate the first 10 pages; additional pages will not be considered or evaluated. Note that the Feasibility Appendix in Volume 5 has no minimum or maximum page limitation, which is the most important structural fact about writing this proposal.
Will a Government Letter of Support help my proposal?
The opposite. USSOCOM prohibits the inclusion of a Government Letter of Support, and any proposal response that includes one will be deemed non-responsive, meaning disqualified. This inverts what several other components in this cycle encourage.
What makes a proposal non-responsive?
Several things independent of technical merit. Including a Government Letter of Support. Including subcontractor costs without copies of the subcontract agreements. Proposing consultants without a separate agreement letter for each. Missing the Technical Volume, the Cost Volume, or the Feasibility Appendix. Exceeding the maximum price in Table 1. And a work share below 50 percent by USSOCOM's stated calculation.
How is the 50 percent work share calculated?
USSOCOM divides the overall price submitted or negotiated, minus the total cost of subcontractors and consultants with applied indirects, by the total price of the proposal. The resulting offeror percentage must be 50 percent or higher, and if it is lower the proposal will not be evaluated. Note separately that consultant fees, facility leases or usage fees, and other subcontract or purchase agreements together may not exceed one-half of the total contract price unless approved in writing by the Agreements Officer.
What must my feasibility documentation show?
That the scientific and technical merit and feasibility of the objectives described have been met, with potential commercial applications, documented through technical reports, test data, prototype designs and models, and performance goals and results. The work must have been performed and be owned, meaning data rights, by the offeror or the Principal Investigator. The Feasibility Appendix is evaluated first, and USSOCOM will not continue evaluating the proposal if feasibility is not established or if the work was not substantially performed by the offeror or the PI.
What specifically should the feasibility study have covered?
Eight things. Define the system architecture. Select the platform configuration. Model navigation performance across the full 200 to 300 nautical-mile multi-hop relay geometry including error propagation, time-transfer degradation, and observability across all hops. Study payload integration on a representative Group 3 UAS. Analyze attitude sensor bias instability. Trade front-end optics magnification against coarse pointer precision. And culminate in fabrication of a prototype payload and demonstration of a single optical flight link validating acquisition, precision tracking, and single-link state exchange.
Does the feasibility study really require a flight demonstration?
That is what the topic says: the study should culminate in fabrication of a prototype payload and demonstration of a single optical flight link. It is described as a Technology Readiness Level 3 study, which is normally analytical and experimental proof of concept rather than flight demonstration, so the label and the substance sit oddly together. The substance is what an evaluator will look for. If your prior work is ground-to-ground or analytical only, present exactly what you have and what it demonstrates rather than letting an evaluator find the gap.
What is the navigation accuracy requirement?
The swarm shall maintain 8 to 11 meters circular error probable, or better, at the most distant node of a formation spanning 200 to 300 nautical miles over feature-sparse terrain, anchored to land-based references at one end and extending beyond visual navigation range at the other. The requirement is defined at the scale of the full swarm, and the formation-level requirement takes precedence over any single link.
What relay geometry is expected?
Approximately 8 to 12 optical hops with per-hop ranges of 20 to 30 nautical miles is given as representative. Proposers may trade hop count against per-hop range, provided the architecture closes the full formation span and meets the formation-level CEP requirement.
What are the three architectural obligations?
Maintain a shared, formation-wide navigation solution across all nodes in the chain. Bound error growth across successive hops such that accumulated drift at the seaward edge remains within the formation-level accuracy requirement. And preserve formation coherence under the loss of individual nodes or links.
What four functions must each crosslink provide?
Simultaneously: high-capacity coherent optical communications with low probability of intercept and detection, two-way precision time transfer, precision optical direction finding, and ranging. Adjacent nodes exchange state vectors, time-transfer references, optical angle measurements, range measurements, and navigation corrections, and a distributed estimator fuses these with local inertial data.
What are the pointing and acquisition targets?
Wide-field acquisition sensing at tens of microradians of precision after approximately 1 second of integration, combined with high-bandwidth photonic beam steering and coherent detection for navigation-grade closed-loop tracking at sub-microradian angular resolution in less than 1 millisecond. Candidate payloads should provide broad angular coverage within Group 3 UAS SWaP constraints, including multi-sector optical apertures.
Why does the topic emphasize atmospheric ducting?
Because it appears three times: as a robustness condition in the feasibility attributes, and in Phase II as ducting effects on pointing-error bias and navigation state estimation. Over water at low altitude, ducting bends the optical path and biases apparent angle, which corrupts direction finding in a way that is correlated across a chain rather than random. That is the mechanism most likely to break a naive multi-hop error budget.
What does Phase II require?
Develop, install, and demonstrate a prototype system on a representative Group 3 UAS formation, extending from one link to multiple cooperating assets. Demonstrate a feature-rich-to-feature-sparse relay chain representative of a 200 to 300 nautical-mile formation, extend optical link range toward 20 to 30 nautical miles, investigate atmospheric ducting effects on pointing-error bias and navigation state estimation, validate cooperative navigation under degraded external-reference conditions, and characterize multi-hop distributed operation across multiple assets. Measured results will be scaled against the 8 to 11 meter CEP objective.
Do I have to fly the full formation in Phase II?
No. The measured results will be scaled against the formation-level objective, which means you demonstrate enough of the chain, at enough range, to support a scaled prediction. That makes the scaling methodology itself a deliverable, and a proposal promising the full 300 nautical mile formation on $1.5 million in 18 months is not credible.
What contract instrument will be used?
A fixed price, level of effort type, Other Transactions Agreement issued in accordance with 10 U.S.C. 4022. Successful completion of the prototype may result in a follow-on production OTA or contract, and follow-on production awards may be FAR-based contracts or Other Transactions. The OTA template is completed only by offerors selected for award.
How is prototype success defined?
Successful completion of the prototype is defined as meeting one or more threshold requirements. On a topic with many stated parameters, that is a materially generous definition and it is worth understanding as you decide which thresholds to commit to.
Is this topic ITAR restricted, and what does that mean for foreign nationals?
Yes. The technology is restricted under ITAR, 22 CFR Parts 120-130, or EAR, 15 CFR Parts 730-774, and offerors must disclose any proposed use of foreign nationals with countries of origin, visa or work permit type, and assigned SOW tasks. More consequentially, USSOCOM states that firms employing foreign nationals to work on USSOCOM ITAR topics must possess an export license to receive a USSOCOM SBIR contract. That is a possession requirement, and export licenses take months.
Can I talk to the topic author?
No. USSOCOM does not allow direct communication with the topic authors, which differs from the DoW SBIR/STTR Program BAA instructions. All technical questions must go through DSIP Topic Q&A, and all questions and answers will be released to the general public. Only proposal preparation questions go to sbir@socom.mil, with the topic number in the subject line. Physical site visits are not permitted during the Pre-release and Open Periods.
What questions will USSOCOM not answer?
Programmatic questions such as providing the technical point of contact, the number of contracts to be awarded, the source of funding, or transition strategy.
Is there any interactive opportunity?
Yes. The USSOCOM SBIR/STTR Program Office will host a virtual USSOCOM Industry Day to specify requirements and stimulate small business and research institute partnership building, with date and time information at events.sofwerx.org.
Is the Company Commercialization Report evaluated?
Yes. Information contained in the CCR will be considered by USSOCOM during proposal evaluations. Note the two-step mechanic: complete and certify it at sbir.gov, then have the Firm Admin upload it to Volume 4 in the Firm Information section of DSIP. That administrative dependency is a common cause of last-minute failures.
What goes in Volume 5?
Four USSOCOM items beyond the DoW BAA requirements. The Feasibility Study, with no page limit. A completed Section K, Representations, Certifications, and other statements of Offerors, which does not count toward the page limit and is where foreign national involvement is identified. Key Personnel resumes. And detailed TABA request documentation if TABA is requested.
What is the Statement of Objectives and what do I do with it?
The SOO and the Contract Data Requirements List are provided on DSIP and are meant to help you consider the required goals, scope, and deliverables. Your technical proposal shall include a non-proprietary Statement of Work with planned tasks and descriptions meeting the SOO goals. Do not upload the whole SOO as your SOW. Exceptions to the requirements need to be identified and explained. If selected, you will submit a separate non-proprietary SOW following the SOO format as Attachment 3, plus company information and expected milestones as Attachment 1.
What are the TABA rules?
Up to $25,000 for the initial Phase II award and up to an additional $25,000 for one sequential Phase II award, for $50,000 total per Phase II for a topic. TABA must fit within the maximum base value in Table 1 and its value must be in the Cost Volume. It cannot include profit or fee by the proposing small business, must be inclusive of provider indirects, and cannot be used in your G&A calculation. Fifty percent is provided at award and 50 percent upon approval of the final TABA report and provider invoices, and a report is required at the end of the base period. Five documentation items are required, and omitting any means denial. Five arrangements are prohibited, including proposing yourself, an affiliate, an investor, or an existing subcontractor or consultant as the provider.
When will I hear back, and can I get feedback?
Within 90 calendar days of the closing date, approximately January 19, 2027, by email to the Corporate Official via DSIP. Non-responsive proposals are also notified. A non-selected offeror may make a written request to the Contracting Officer within 30 calendar days of receipt of notification for informal feedback, which the Contracting Officer will provide rather than a formal debriefing.
What CMMC level applies?
The projected requirement for this topic is CMMC Level 2 with self-assessment.
Positioning Advice for Companies Considering This Topic
Settle the export license question before anything else. If you employ foreign nationals who will work on this ITAR topic, USSOCOM requires that you possess an export license to receive the award. That is possession, not disclosure, and licenses are not quick. On a topic where optical and photonics talent is internationally sourced, this is the most likely reason a technically strong firm cannot take the award.
Remove any Government Letter of Support. It is a disqualifier, it contradicts what other components encourage, and it is the kind of thing that survives in a proposal template reused from another agency.
Put the real analysis in the Feasibility Appendix, not the technical volume. Ten pages against unlimited pages is the structural fact that should drive your whole writing plan. The multi-hop error budget, the link budgets, the trade study across all viable design options, the flown single-link evidence, the attitude bias analysis, and the optics magnification trade all belong in the appendix, which is also evaluated first as a gate. The technical volume is for the Phase II plan and the non-proprietary Statement of Work.
Build the error budget across hops, with the correlation structure stated. Eight to eleven meters CEP at the far end of a twelve-hop chain is the requirement, and whether it closes depends entirely on whether per-hop errors are independent or share a common bias. That is why ducting matters. Presenting a per-hop budget, a correlation assumption, and the resulting formation-level number is the single most persuasive thing you can do, and it directly answers the obligation to bound error growth across successive hops.
Make the hop count versus per-hop range trade explicitly. The topic permits it and it is a real design lever: fewer longer hops reduce accumulated terms but demand more link margin, larger apertures, and tighter pointing at range, while more shorter hops relax the optics and stress the estimator. Show both ends of the trade and defend your choice.
Treat ducting as your differentiator. It is named three times, no reference is supplied for it, and it is the mechanism most likely to invalidate a naive error budget over water. Bring the maritime propagation and evaporation duct literature yourself and show how your architecture detects or bounds a correlated pointing bias. Most proposals will list ducting as a risk and move on.
Do not lead with a superb single terminal. The topic says explicitly that the formation-level requirement takes precedence over any single link. A proposal organized around terminal specifications, however good, is answering a question USSOCOM told you was subordinate. Organize around the formation and let the terminal follow.
Justify your SWaP against Group 3 numerically. Existing free-space optical terminals often exceeding Group 3 constraints is named as one of the three reasons the capability does not exist. Mass, volume, prime power, and thermal dissipation, against a stated aircraft, is the answer. And if you propose a gimbal rather than multi-sector apertures with photonic steering, you owe a strong SWaP argument, because the topic points toward the latter.
Map your architecture onto the four reference pillars. Link and atmosphere from Kaushal and Trichili, acquisition and pointing from Kaymak and Bashir, alternative PNT from the NAVIGATION work, and distributed estimation from Ou. Every reference carries a Government annotation explaining its relevance, which is effectively the reviewer's mental model handed to you. Use their vocabulary.
Get subcontract agreements and consultant letters executed early. Missing either is non-responsive, not merely weak. On a topic likely requiring an optical terminal specialist, a beam steering supplier, and a UAS integrator, that is several agreements with statements of work and detailed cost proposals to have in hand by October 21.
Run the 50 percent formula yourself. USSOCOM published the arithmetic, subcontractor and consultant costs are counted with applied indirects, and falling below stops the evaluation. Also watch the separate one-half ceiling on consultant fees, facility leases or usage fees, and subcontracts combined, which is where flight range and aircraft access costs land.
Lock down aircraft and range access now. Eighteen months to install and demonstrate on a representative Group 3 UAS formation, over a feature-rich to feature-sparse terrain transition, with multi-hop operation, means platform and range access are on your critical path from award. Naming them converts a plan into a commitment.
State your Phase II demonstration configuration and scaling methodology. Results will be scaled against the formation-level objective, so how many aircraft, at what ranges, over what terrain, and by what analysis you extrapolate is the deliverable. Being explicit here is more credible than promising the full formation.
Ask public questions carefully. All Topic Q&A questions and answers are released to the general public and there is no back channel. Ask about ambiguities in the requirement; do not reveal your architecture in a question.
Attend the Industry Day. It is the only interactive opportunity, its stated purpose includes stimulating small business and research institute partnership building, and this topic is one where the winning team is likely a terminal firm plus an integrator.
Complete and certify the CCR early. It is evaluated by USSOCOM, and the mechanic requires certifying on sbir.gov and then a specific Firm Admin uploading to DSIP. That dependency has ended more submissions than most technical problems.
