Radar Observer · Controls — Gain
If the radar gain control is set too low, the likely result is:
- AExcessive background noise
- BWeak or small targets are not displayed✓ Correct
- CThe range rings disappear
- DThe heading flash doubles
Explanation
Too little gain fails to amplify weak echoes, so small or distant targets are lost. Gain is set just high enough to show a light background speckle, ensuring weak targets are not missed.
Authority: Radar Operation (USCG topic)
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