Northrop Grumman Systems Corp., Woodland Hills, California, was awarded a $21,214,122 indefinite-delivery/indefinite-quantity contract containing firm-fixed-price provisions for repair, calibration, overhaul, and manufacture long lead component shop replaceable units. This requirement is to deliver repaired, calibrated, and overhauled replacement units to support the Naval Undersea Warfare Center Division Newport Submarine High Data Rate (SubHDR) National Maintenance Center, which is responsible for returning SubHDR components to ready for issue condition for the fleet. This contract combines purchases for the Navy (90%); and the government of United Kingdom (5.5%), Commonwealth of Australia (2.5%), and Canada (2%) under the Foreign Military Sales (FMS) program. Work will be performed in Salt Lake City, Utah, and is expected to be completed in August 2028. Fiscal 2021 operation and maintenance (Navy) funds in the amount of $1,073,105 (58%); and FMS United Kingdom, Commonwealth of Australia, and Canada funds in the amount of $781,327 (42%) (combined) will be obligated on the first delivery order, of which funds in the amount of $1,073,105 will expire at the end of the current fiscal year. This contract was solicited as a sole source requirement under the authority of 10 U.S. Code 2304(c)(1), as implemented in Federal Acquisition Regulation (FAR) 6.302-1: only one responsible source and no other type of supplies or services will satisfy agency requirements. The Naval Undersea Warfare Center Division Newport, Rhode Island, is the contracting activity (N66604-21-D-B000). (Awarded Aug. 27, 2021)