What is the purpose of alternate navigation means?

• A. To reduce pilot workload during normal operations.
• B. To provide a backup method of navigation when primary navigation aids fail or are unreliable.
• C. To improve navigation accuracy in all conditions.
• D. To enable automatic routing without pilot input.

Answer: (B)

Alternate navigation means are built to provide a backup method for determining position and tracking the route when the primary navigation aids are unavailable or unreliable. In flight, you rely on main systems like VOR, GPS, or instruments tied to the airways for guidance. If those fail or degrade, switching to an alternate means lets you maintain situational awareness, verify your position, and continue to fly the planned course safely. It’s not about reducing workload during normal operations, and it doesn’t guarantee better accuracy in all conditions. It also doesn’t imply automatic routing without pilot input—the backup methods are used to support continued navigation with appropriate pilot actions and checks.