Navigation General · Radar Controls
The radar control used to reduce the clutter of return echoes from rain or snow is the:
- ASea clutter (STC) control
- BRange control
- CGain control only
- DRain clutter / FTC (fast time constant) control✓ Correct
Explanation
The rain clutter control (FTC / differentiator) suppresses the diffuse returns from precipitation, while the sea clutter control (STC / sensitivity time control) suppresses close-in wave returns. Both must be used carefully so as not to also suppress small real targets.
Authority: Radar operation; clutter controls
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