What should the RMU memory contain for VHF NAV?

The RMU (Radio Management Unit) memory for VHF NAV is designed to store up to 10 frequencies. This capacity allows pilots to quickly reference and switch between multiple navigation frequencies during flight which is critical in managing communication and navigation needs effectively. The ability to store a substantial number of frequencies ensures that the pilot can maintain situational awareness and quickly adapt to changing air traffic control communications or navigation requirements without having to manually input frequencies repeatedly.

Having 10 frequencies in memory is particularly beneficial because it aligns with the typical operational needs of pilots who often require access to various VHF NAV channels for different airspace and operational situations. Thus, the correct answer reflects the designed capability of the RMU memory system to enhance operational efficiency and safety in navigation processes.