US submarines' mission-critical system to get upgrade with new contract

British company SERCO has secured a $97 million contract to continue supporting and upgrading the U.S. Navy’s Submarine High Data Rate (SubHDR) antenna systems for the next decade. These mission-critical systems enable U.S. submarines to maintain high-capacity, secure communications—including wide-band data, voice, imagery, and video conferencing—while submerged. SERCO, which has supported the SubHDR program for over 20 years, will conduct most of the maintenance, repair, and upgrade work at its Ludlow, Massachusetts facility, with additional support in Newport, Rhode Island. The SubHDR system operates in extremely high frequency (EHF) and super high frequency (SHF) bands, allowing submarines to connect via mast-mounted antennas to military satellite networks such as Milstar, the Global Broadcast Service, and the Defense Satellite Communication System. This capability ensures underwater forces remain integrated into coordinated fleet and joint task force operations. Originally developed with contributions from Raytheon, the SubHDR system has