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In the early 1960s, the U.S. Navy deployed a worldwide network of fourteen AN/FRD-10 arrays based on lessons learned from the Bondville experimental array. Two additional arrays were installed at Sugar Grove, WV for naval HF communications (not direction finding), and two additional arrays were installed in 1970-71 by the Canadian Forces in Gander, Newfoundland and Masset, British Columbia. As of 2007, fourteen of the arrays have been decommissioned, only the Canadian arrays remain in service.
In 1959 the first contract to build the next generation Wullenweber array -- the AN/FLR-9 antenna receiving system -- was awarded by the U.S. Air Force to GT&E Sylvania Electronics Systems in Mountain View, CA (now [[General Dynamics]] Advanced Information Systems). The contract called for the completion of two AN/FLR-9 systems at [[San Vito dei Normanni Air Station]], Italy and [[RAF Chicksands]], United Kingdom. Installation of the first two systems was completed in 1962. The San Vito array was dismantled following base closure in 1993 and the Chicksands array was dismantled following base closure in 1996.
A second contract was awarded to Sylvania to build AN/FLR-9 systems at [[Misawa AB]], Japan; [[Clark AB]], Philippine Islands; Pakistan (never built); [[Elmendorf AFB]], Alaska; and Karamursel AS, Turkey. The last two were completed in 1966. The Karamursel array was dismantled in 1977 following a conflict over foreign aid to Greece. The Clark AB array was decommissioned immediately after the Mt. Pinatubo volcano eruption in 1991. As of 2007, only the Elmendorf and Misawa arrays remain in service, but both are likely to be decommissioned soon due to their age and unavailability of repair parts.
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