Sea Based X-Band Radar (SBX)

The Sea Based X-Band Radar (SBX) program, managed by the Missile Defense Agency, aims to enhance missile defense capabilities through advanced radar technology. The SBX is a mobile, ocean-going radar system designed for mid-course acquisition, tracking, discrimination, and hit-assessment of missile threats. Its primary objective is to support the Homeland Defense mission by providing precise tracking and discrimination of intercontinental ballistic missile threats. The SBX operates both at sea and in port, participating in flight and ground tests as part of the Missile Defense System.

The MX46 project within the SBX program focuses on development support for the radar's three major subsystems: the self-propelled vessel, the X-Band Radar (XBR), and its communications network. Key goals include maintaining operational readiness through vessel operations and support, ensuring software compatibility with the Missile Defense System, and conducting necessary maintenance activities. The project also addresses specific technical challenges such as radome replacement to address adhesion failures and water intrusion issues.

In FY 2025, significant efforts are planned for vessel in-port maintenance and upgrades. These activities include major overhauls of critical components to meet readiness requirements and operational needs. Additionally, mandatory certifications from the American Bureau of Shipping will be completed to ensure continued at-sea operations. The program also plans to perform comprehensive maintenance on the XBR while in-port to enhance its operational effectiveness and data accuracy.

The MD40 Program-Wide Support component provides essential non-headquarters management costs across various Missile Defense Agency functions. This includes support for global deployments, facility capabilities for MDA locations worldwide, and compliance with statutory environmental requirements. The program ensures integrity and oversight of the Missile Defense System while supporting technology development to respond to evolving threats. This support is allocated on a pro-rata basis across multiple agency program elements each fiscal year.