This system has been in use by European hams for some decades, The QRA Locator The current Grid Square Locator System, as we know it today, is the evolution of a previous method, invented in the late 1950s with the goal to help in calculating scores for VHF contests. Here we will try to recap the history and the origin of all these names. QTH Locator, QRA Locator, Maidenhead Locator and WW Grid Locator system are all different terms, often used to identify the same system, that should sound familiar to you. Not all radio amateurs, and especially the youngest ones, however, do not know the history of the birth of this clever, although crude, method of calculating position on earth. The grid locator system is one of the many peculiarities that characterize the amateur radio world, and of which all radio amateurs are or should be aware. The Grid Square Locator, also known as the Maidenhead Locator System, is a geographical co-ordinate method based on a 6-digit code, widely used by amateur radio operators to determine a rough position on the Earth.
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