Sikorsky Product History

The first S61 model carried the US Navy designation HSS-2. H for helicopter, first S for antisubmarine, second S for Sikorsky, and -2 denoting the second model in the series, since the HSS-2 was preceded by the S-58 HSS-1. In 1962 Navy modified their designation pattern so that the HSS-2 became the SH-3, with S for antisubmarine and H for ... ................
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