The RMU stores up to ____ VHF communication frequencies in preset memory channels.

The correct number of VHF communication frequencies that the RMU (Radio Management Unit) can store in preset memory channels is 10. This allows for quick access to frequently used frequencies, enhancing communication efficiency during flight operations. The RMU’s design enables pilots to rapidly switch between these preset frequencies without needing to manually enter the frequency each time.

Storing 10 frequencies strikes a balance between providing enough options for most flight scenarios while maintaining a manageable number that pilots can easily remember and utilize effectively during operations. This feature is essential for ensuring that pilots remain in contact with Air Traffic Control and can communicate with other aircraft, thereby enhancing safety and operational effectiveness in various flight conditions.

The number of frequencies stored in the RMU is specifically designed to meet the operational needs of pilots while also simplifying frequency management, distinguishing it as a vital tool in the cockpit.