Which statement is true about the final step in the tuning sequence?

• A. Increase Brilliance to maximum
• B. Set Suppressions to ZERO
• C. Tune for maximum return
• D. Turn on Suppressions as needed

Answer: (D)

Suppressions are used to clean up the radar display by silencing unwanted echoes, such as clutter from land, sea, or weather. In the final tuning step you turn these suppressions on as needed so you can suppress enough clutter to make real targets stand out, without turning them up so high that you miss legitimate echoes. This balances clarity and safety, giving a clear picture of what’s actually present.

Other approaches would either wash out small targets (cranking brilliance), leave clutter visible (zero suppression), or emphasize every echo (tuning for maximum return), which isn’t how you get a clean, usable display.