Which statement best describes the use of terrain display for navigation?

• A. It should be used as the primary navigation method.
• B. It should not be used for navigation.
• C. It may be used in mountainous terrain only.
• D. It should be used only when EGPWS data is unavailable.

Answer: (B)

Terrain display is a safety awareness tool that complements primary navigation systems, not a substitute for them. It shows surrounding terrain and potential threats with color coding to help you anticipate obstacles and plan safe altitudes and routes, but navigation should rely on the aircraft’s primary nav systems (GPS/INS, etc.). Use the terrain display to confirm situational awareness and to avoid terrain, not to determine your course or position. This capability is useful across all terrains, not just mountains, and its use isn’t contingent on EGPWS being unavailable—the display supports ongoing terrain awareness even when EGPWS is providing warnings.