How can you differentiate land returns from genuine moving targets on a radar display?

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Multiple Choice

How can you differentiate land returns from genuine moving targets on a radar display?

The key idea is that fixed land features stay in the same place on the radar screen over time, while real moving targets change their position from sweep to sweep. Land echoes are persistent and anchored to a fixed bearing and range, so they don’t drift as you watch successive scans. Moving targets, on the other hand, shift in bearing and range as they travel, and you’ll often see a trail or streak that traces their path across the history of sweeps. By observing the display over time, you can separate stationary land clutter from genuine moving targets: stationary echoes signal land; shifting echoes indicate targets. Color or strength alone isn’t a reliable discriminator, and the idea that moving targets would appear stationary or that land would move isn’t consistent with how radar returns behave.

The key idea is that fixed land features stay in the same place on the radar screen over time, while real moving targets change their position from sweep to sweep. Land echoes are persistent and anchored to a fixed bearing and range, so they don’t drift as you watch successive scans. Moving targets, on the other hand, shift in bearing and range as they travel, and you’ll often see a trail or streak that traces their path across the history of sweeps. By observing the display over time, you can separate stationary land clutter from genuine moving targets: stationary echoes signal land; shifting echoes indicate targets.

Color or strength alone isn’t a reliable discriminator, and the idea that moving targets would appear stationary or that land would move isn’t consistent with how radar returns behave.

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