 The QRA locator system in the 4-character format was introduced at a meeting of the VHF Working Group in The Hague in October 1959.The QRA locator was further developed with the addition of the fifth character at the Region 1 Conference in Malmö (1963).The QRA locator was officially adopted by IARU Region 1 in 1966 and was renamed "QTH-locator" a year later.