The SOFAR channel, or Sound Fixing and Ranging channel, is a layer in the ocean where sound waves travel efficiently. It forms at a specific depth where temperature, pressure, and salinity create optimal conditions for sound propagation. This channel can extend for thousands of kilometers and is crucial for underwater acoustics. In the SOFAR channel, sound waves can travel long distances with minimal loss of energy. This phenomenon is utilized in various applications, including marine biology research, submarine communication, and oceanographic studies. Understanding the SOFAR channel helps scientists study ocean dynamics and marine life behavior.