The Department of Defense (DOD) is seeking proposals for the topic "Modular Open Architecture Assured Positioning, Navigation, and Timing (PNT) Hub" as part of their SBIR 24.2 Annual solicitation. The objective is to develop a modular device that integrates non-GPS sources of position, velocity, attitude, and time to enable operations in GPS-denied environments. The device should align with Modular Open Systems Approach principles and support open architecture technologies. The SBIR topic aims to leverage commercial off-the-shelf technologies and government-owned or open interfaces to produce a device with configurable hardware/software modules for platform and sensor interfaces, a configurable software hosting environment, and software development kit. The project will involve a Phase I feasibility study, Phase II prototype development, and Phase III collaboration with defense agencies and prime contractors for transition opportunities. This technology will benefit defense contractors and navigation-based platforms, align with SOSA principles, and allow for interoperability without intellectual property limitations. The solicitation is open until June 12, 2024. For more information, visit the SBIR topic link or the solicitation agency website.