Signal codes are standardized systems used to convey information quickly and efficiently, often in situations where verbal communication is not possible. These codes can be visual, auditory, or tactile, and are commonly used in various fields such as aviation, maritime navigation, and emergency services. For example, the International Morse Code uses a series of dots and dashes to represent letters and numbers. In addition to Morse code, other signal codes include flag signaling in maritime contexts and hand signals used by traffic controllers. These codes help ensure clear communication, especially in critical situations where misunderstandings can lead to serious consequences.