How many VHF NAV presets can be stored using the RMU?

The correct number of VHF NAV presets that can be stored using the Radio Management Unit (RMU) is 10. The RMU is designed to facilitate easy management of various radio functions, including navigation and communication. Its ability to store 10 presets allows pilots to quickly access commonly used navigation frequencies, enhancing operational efficiency and situational awareness in-flight.

This functionality is particularly important for maintaining communication with air traffic control and navigating to various waypoints, making quick frequency changes critical in certain flight situations. This design reflects a balance between capacity and usability, enabling pilots to have immediate access to a practical number of frequently used frequencies without becoming overloaded with options.