How many presets can the backup UHF control head store?

The backup UHF control head can store a total of 20 presets. This capability allows the pilot to quickly access commonly used frequencies, enhancing operational efficiency and communication effectiveness during flight operations. Each preset can be programmed with a specific frequency, ensuring that the pilot has immediate access to essential channels without the need to manually dial each frequency, which could distract from flying the aircraft.

Having a robust number of presets is crucial for managing communications in dynamic environments, especially in aviation scenarios where rapid adjustment to changing frequencies is essential. The number 20 is significant, as it provides a balance between a wide range of selectable frequencies while still being manageable for user input and recall during missions.