Which statement is true regarding the North Atlantic Tracks (NAT)?

The correct answer pertains to the labeling system used for the North Atlantic Tracks (NAT), which are defined routes over the North Atlantic Ocean that support efficient and safe air traffic between North America and Europe. The labeling for these tracks follows a specific convention to facilitate communication and navigation.

In this system, westbound tracks are indeed labeled U through Z. This sequential labeling allows pilots and air traffic controllers to quickly identify and differentiate between the various tracks that planes may use in the busy airspace. The use of the letters U to Z specifically for westbound flights helps maintain clarity and organization in the tracking system, which is crucial for managing the high volume of transatlantic flights.

The incorrect options either mischaracterize the labeling system for eastbound tracks or suggest a random labeling, which does not reflect the structured and systematic approach used in actual aviation practice. Understanding this labeling system is important for pilots operating in that region, as it directly impacts their navigation and compliance with air traffic control instructions.