Trandes Corp.,* Lanham, Maryland, is awarded an estimated $11,619,097 contract modification to increase the ceiling of an existing indefinite-delivery/indefinite-quantity, cost-plus-fixed-fee and cost-reimbursement contract (N66001-15-D-0146). Support includes removal of old and installation of new commercial-off-the-shelf precision approach radar; logistics and training support; remote landing site tower generator repair; tactical air navigation systems installation support; and Marine Air Traffic Control and Landing System, and Amphibious Assault Direction System sustainment support. This modification increases the estimated value of the contract from $19,226,946 to $30,846,043. This ceiling increase does not obligate funds. Funding will be obligated via task/delivery orders, which will be placed using operations and maintenance (Navy); and other procurement (Navy) funds. This modification is issued using other than full and open competition in accordance with Federal Acquisition Regulation Subpart 6.302-1 and 10 U.S. Code 2304(c)(1) – only one responsible source. Space and Naval Warfare Systems Center Pacific, San Diego, California, is the contracting activity.