What is the primary role of procedure charts in VNAV operations?

The primary role of procedure charts in VNAV operations is to provide detailed guidance on VNAV profiles and altitude restrictions. These charts are essential because they contain critical information about vertical navigation for flight operations. They outline specific altitude profiles that aircraft should follow during different phases of flight, such as climbs, descents, and level flight. This ensures that pilots can follow precise vertical paths, adhere to air traffic control instructions, and comply with any altitude restrictions that may be in place for safety or airspace management.

In addition to altitude profiles, the procedure charts provide crucial details about transition altitudes, minimum safe altitudes, and other vertical navigation parameters necessary for efficient flight operations. Having this information readily available allows pilots to execute VNAV maneuvers more effectively, ensuring safety and efficiency throughout the flight.