During June 1987, the US Coast Guard conducted a series of tests to determine the ability of two airborne radar systems, mounted aboard a Coast Guard MRS aircraft (HU-25A), to detect small search-and-rescue type objects. The systems evaluated were the AN/APS-127 forward-looking airborne radar and the AN/APS-131 side-looking airborne radar. Realistic radar searches were conducted to collect data using unalerted sensor operators and standard search patterns. Analysis of the detection data confirmed that the probability of detecting these targets varied with significant wave height, search altitude, and target size as well as lateral range to the target.
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