What is a requirement for electronic chart displays according to the navigation standards?

The requirement for electronic chart displays that aligns with navigation standards is that all data must be displayed in uppercase. This standard ensures clarity and consistency in the information presented on electronic chart systems, which is crucial for safe navigation. Uppercase letters improve legibility, especially when displayed on screens where varying font sizes and styles can lead to misinterpretation of critical navigational information.

Other options such as trackline visibility adjustments, color coding of charts, and compatibility with various devices, while they may contribute to functionality and usability in navigating, do not represent a mandated standard for electronic chart displays in the same way that the requirement for all uppercase data does. These aspects are often left to the discretion of the operators or manufacturers to enhance usability but are not universally required for compliance with navigation standards.