 In addition, a large number of rocket-borne instruments were launched from a firing area at Barking Sands, Kauai, in the Hawaiian Islands.A very large number of United States military ships and aircraft were operating in support of "Starfish Prime" in the Johnston Island area and across the nearby North Pacific region, including the primary instrumentation ship USAS American Mariner providing measurements conducted by personnel provided by RCA Service Company and Barnes Engineering Company.A few military ships and aircraft were also positioned in the southern conjugate region for the test, which was near the Samoan Islands.