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Triangulation



Triangulation uses two or more radio direction finding stations to locate the source of a radio signal. On the chart shown here there are two land based stations, one in Cape Cod and the other in Puerto Rico. Once two or more stations have plotted on a chart the direction they received a signal from the transmitter's position can be known with fairly good accuracy by where the two directional lines cross.

Also plotted is this chart is the position of every u-boat sunk during WWII. (click on the image for a larger version.)