DHO38 has transmitted since 1982 on 23.4 kHz with a power of up to 800 $4. DHO38 uses an umbrella aerial, which is carried from 8 steel tube masts with a height of 352.8 metres. Each pylon stands on 3 metre tall ceramic cylinders, which serve as insulators for voltages up to 300 $4. The masts are equipped with cylindrical oscillation dampers for better protection against storms. The transmitter is capable of transmitting signals to submarines worldwide to depths of approx. 30 metres.