Which term is used to refer to low-altitude airways?

The term used to refer to low-altitude airways is "Victor airways." These airways are specifically designated for aircraft operating below 24,000 feet, primarily within the lower levels of the National Airspace System. They provide a structured path for aircraft to navigate between various points while ensuring safe separation and efficient traffic flow.

Victor airways are typically part of the United States air traffic control system and are marked on aeronautical charts, making it easier for pilots to plan their routes at lower altitudes where they may not be in contact with radar services. This is crucial for managing air traffic in busy airspace, especially in the vicinity of airports and within certain controlled airspace regions.

Other terms mentioned, such as jet routes, refer to higher altitude airways intended for jet aircraft operating at altitudes above 24,000 feet. High-altitude airways are designed for similar purposes at these greater altitudes. Local airways, on the other hand, do not specifically refer to any well-defined structure in the airspace system like Victor airways do. Therefore, "Victor airways" is the correct answer as it accurately denotes the airways utilized for low-altitude flight operations.