Submarine communications refer to the methods used to transmit information underwater, primarily for military and research purposes. This involves the use of specialized cables, such as submarine fiber optic cables, which are laid on the ocean floor to connect different land-based locations. These cables enable high-speed data transfer and are crucial for global internet connectivity. Another method of submarine communication is through acoustic waves, which use sound to transmit messages underwater. This technique is often employed by submarines and underwater vehicles, as radio waves do not travel well in water. Acoustic communication systems can relay important data, such as location and status, between submerged vessels and surface ships.