What is a requirement for printed forms, charts, or terminal procedures used for navigation?

For printed forms, charts, or terminal procedures used for navigation, it is essential that they are printed in the original scale and are current. This requirement ensures that the navigational information is accurate and reflects the most up-to-date data available. Using current materials is vital for safety, as changes can occur in airspace, procedures, and regulations that could affect navigation.

Furthermore, printing in the original scale maintains the integrity of the information. Scale is important because it determines the accuracy of distances and measurements depicted on the chart or form. When pilots use these navigational tools, they must be able to interpret them correctly; deviations from the original scale can lead to misunderstandings and potentially unsafe situations during flight operations.

Keeping these materials current and at the appropriate scale helps ensure that all operational decisions are based on reliable and precise information, fostering a higher standard of safety in aviation practices.