Abstract
The SECOM II (SEcurity COMmunications) system is a High Frequency (HF) system which provides two-way digital communications between a central controller and vehicles carrying nuclear weapons and special nuclear material anywhere in the contiguous 48 states. The system operates on four HF frequencies in the 3 to 12 Mhz range. While the primary mode of operation is digital, a voice capability is also provided for unusual situations where additional information must be communicated. Initial system operation began in April, 1976 and the system became fully operational in March, 1977. The system consists of mobile terminals installed in vehicles which communicate with five relay stations. The relay stations are connected with the control center by leased telephone lines. The report describes the operation of the system and the equipment installed in the vehicles, relay stations, and the control center.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
