How many lines of alphanumeric data can a Full Data Block contain?

A Full Data Block can contain up to four lines of alphanumeric data, which is the designed capacity for transferring information in specific aviation communication protocols. Each line can accommodate a variable number of characters, allowing for detailed and organized transmission of critical data necessary for flight operations. This structure enhances clarity and ensures that essential information is conveyed without confusion or loss of detail. Understanding the limits of a Full Data Block is crucial for effective communication and data management in air traffic control systems.