Radar Observer · Controls — Clutter
The anti-clutter rain (FTC / fast-time-constant) control is used to:
- AReduce clutter caused by rain, snow, and other precipitation✓ Correct
- BIncrease the antenna rotation speed
- CMeasure target bearing
- DSet the guard zone
Explanation
Anti-clutter rain (FTC) differentiates target edges from the diffuse return of precipitation, helping reveal targets within a rain squall. Like sea clutter control, excessive use can suppress real echoes.
Authority: Radar Operation (USCG topic)
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