The Department of Defense, through the Naval Undersea Warfare Center Division Newport (NUWCDIVNPT), is seeking information from qualified contractors for the repair, restoration, and replacement services of the Submarine High Data Rate (SubHDR) Mast Motion Sensor (MMS). The procurement aims to establish a Cost-Plus-Fixed-Fee, Firm-Fixed-Price, and Cost Reimbursement indefinite delivery/indefinite-quantity contract on a sole source basis with Northrop Grumman Systems Corporation, the original equipment manufacturer, to ensure the operational capability of the Fleet’s complex mast systems. This requirement is critical for maintaining submarine communication systems and supporting various Naval commands and international military partners. Interested parties must submit capability statements by 2:00 PM on April 29, 2025, to Kate Cyr at kate.m.cyr.civ@us.navy.mil, with the anticipated contract award date expected around December 31, 2026.