In 1959 the United States Naval Facility (NAVFAC) Argentia was established as a Sound Surveillance System (SOSUS) shore terminal. The next year NAVFAC Argentia was terminus for an atypical SOSUS shallow water system designated King Shallow Water composed of ten eight-element arrays, vice the usual forty element deep water arrays. The shallow water system was intended to monitor Soviet patrols into Hudson Bay. In 1963 the first 2x20 array was installed terminating at NAVFAC Argentia. The shallow water system was deactivated in 1968.