CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins82% CONFIDENCEOverall confidence: 82%How well the pin's source and references back up its dates.Weighted average of how firmly 5 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better
ATR's own milestones page: "November 4, 1981 The Cooperation Agreement launching the ATR program is signed in Paris".[1]On 4 November 1981 the chairmen of Aeritalia and Aérospatiale signed in Paris the cooperation agreement that launched the ATR programme and its first aircraft, the ATR 42.
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