Target Detection in clutter conditions ContentsGainThe raw radar return signal consists of targets, precipitation sea clutter, and a level of noise generated by the radar system. The Gain control reduces unwanted radar returns to optimize the radar image.Sea stateSea clutterRadar echoes from breaking waves, sea spray and backscatter appear on the radar screen as clutter. The clutter appears centered around ownship, which reduces performance of short range target detection. These echoes are not repetitive or consistent in position or size. With high winds and extreme conditions, echoes from sea clutter may cause dense background clutter in the shape of an almost solid disc. The Sea anti-clutter control is used to reduce the clutter, improving the quality of the radar image.Rain clutterPrecipitation appears on the radar screen as lots of small echoes which continuously change size, intensity and position — this is known as clutter. The clutter can sometimes appear as large hazy areas, depending on the intensity of the rainfall. The clutter reduces the radar’s target detection performance.Parent topic: Interpreting the radar displayPrevious topic: Reflectors and beacons