Diamond-Dunmore appears to have seen no active uses, but the Lorenz system was deployed at major airports in Germany, the UK and other European locations and their related foreign fields. These generally operated in common medium-wave frequencies on the order of 300 to 400 kHz, frequencies that were, by the mid-war era, on the decidedly low-frequency range. The optical resolution of any system is a combination of the wavelength and the size of the antenna system, so using these frequencies resulted in relatively low accuracy.