VLF Transmission stands for Very Low Frequency transmission, which refers to radio waves with frequencies between 3 kHz and 30 kHz. These low-frequency signals can travel long distances and penetrate deep into the ocean, making them useful for communication with submarines and other underwater devices. VLF waves are also used in various applications, including navigation systems and time signals. Due to their long wavelengths, VLF transmissions can diffract around obstacles and follow the curvature of the Earth, allowing them to reach remote areas where higher frequency signals may not be effective.