A "Distress Signal" is a communication used to indicate that someone is in danger and requires immediate assistance. These signals can be sent through various means, including visual signals like flares, auditory signals like whistles, or electronic signals like emergency beacons. They are crucial in emergencies, helping rescuers locate and assist those in need. In maritime contexts, distress signals are standardized internationally, such as the SOS signal in Morse code or the use of the Mayday call. In aviation, pilots may use transponders to send distress signals to air traffic control. These signals play a vital role in ensuring safety and prompt rescue operations.