Rockwell Collins Inc., a part of Collins Aerospace, Cedar Rapids, Iowa, is awarded a $16,282,947 cost-plus-fixed-fee, cost reimbursable modification (P00001) to a previously awarded contract (N0001922C0045). This modification adds scope to provide for the adoption and application of updated security classification requirements, as well as to provide a preliminary design analysis and solution trade studies for an updated Very Low Frequency (VLF) receiver solution in support of the developmental design and obsolescence mitigation engineering efforts for the airborne VLF system modernization in order to meet program capability requirements. The modernization effort is required to provide a compatible and producible VLF system to be integrated into a C-130 aircraft. Work will be performed in Richardson, Texas (90%); and Cedar Rapids, Iowa (10%), and is expected to be completed in February 2024. Fiscal 2022 research, development, test and evaluation (Navy) funds in the amount of $1,247,142 will be obligated at the time of award, none of which will expire at the end of the current fiscal year. The Naval Air Systems Command, Patuxent River, Maryland, is the contracting activity.