The High Frequency Radio System Shore (HFRS-S) HF Architecture document outlines the physical and interface designs for the United States Coast Guard's (USCG) high-frequency communication systems. It details the interfaces between HF transmitters, receivers, transceivers, and shore infrastructure, facilitating long-range communication in the 2.0MHz-30MHz spectrum. The document covers three configurations: 4KW, 1KW COTHEN, and 4KW COTHEN interface designs, including single and two-transmitter setups at various USCG Communication Commands and Remote Communication Facilities. It describes RF, audio, keyline, and serial control interfaces, emphasizing interoperability with other USCG assets and mission partners. The HFRS-S architecture ensures secure and efficient communication pathways, with all testing to be performed according to the HFRS-S Test and Evaluation Master Plan.
The US Coast Guard's C5ISC division is seeking to acquire Next Generation High Frequency Radio System – Shore (HFRS-S) components to replace their aging High Frequency Shore Communications Systems (COMSYS). The replacement aims to restore Beyond Line Of Sight (BLOS) high-frequency communications, which are currently hampered by end-of-life systems, high costs, and lack of spare parts. The HFRS-S will be a commercially available system comprising transceivers, receivers, high power amplifiers, and power supplies, with configurations ranging from 1KW to 10KW. The system must comply with various military, government, and commercial standards, including MIL-STD-188-141D and TEMPEST requirements. The procurement also includes provisions for installation, equipment, hardware, software, training, quality assurance, warranty, and comprehensive technical data, with a strong emphasis on cyber security compliance and obsolescence management.