Which of the following is the correct listing of the HUD's display master modes?

• A. Navigation, air-to-air, and air-to-ground
• B. F-16, F-18, and navigation
• C. F-16, F-18, and tapes
• D. Navigation, approach, and weapons

Answer: (A)

The HUD’s display master modes are the high‑level modes that decide what information and symbols dominate the pilot’s view, based on the current task. The three primary master modes are navigation for flight guidance, air‑to‑air for detecting and engaging other aircraft, and air‑to‑ground for targeting and delivering on ground objectives.

In navigation mode, the HUD emphasizes flight-path guidance, waypoints, altitude, airspeed, and other flight‑oriented cues to help you stay on course. In air‑to‑air mode, the focus shifts to target cues, range to targets, lead pursuit indicators, and other symbols that support air combat. In air‑to‑ground mode, the HUD highlights target designation, weapon status, and aiming/impact cues for ground attacks.

Options that reference aircraft models (like F‑16 or F‑18) or nonstandard terms (such as tapes or approach) aren’t how HUD master modes are defined, since those don’t represent the set of primary display tasks the HUD is built to support.