9.7 Radar tuning — DIGITAL scanners
You can use the gain presets and other functions to improve the quality of the radar picture.
Tuning method | Related options | Description | |
Gain presets | For each preset, the | The digital radar | |
• Buoy — a special | following options are | gain presets enable | |
available: | you to quickly select | ||
| mode that enhances | • Gain — enables you | |
| the detection of small | to achieve the best | |
| objects like mooring | to use a preset in | picture in different |
| buoys. It is useful at | fully automatic mode, | situations. Raymarine |
| ranges up to 0.75nm. | or to adjust its gain | strongly recommends |
• Harbor — this is the | manually between 0 | the use of these presets | |
| default mode. This | and 100%. | to achieve optimum |
| • Color Gain— adjusts | results. However, each | |
| setting takes account | ||
| of land clutter so that | the intensity (color) of | of the gain presets can |
| smaller targets, like | displayed targets, but | be manually adjusted |
| navigation buoys, are | does not significantly | using gain, color gain, |
| not lost. | affect the number of | rain, and sea gain |
• | Coastal — accounts | targets displayed. | functions. |
Increasing the |
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| for the slightly higher |
| |
| color gain causes |
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| levels of sea clutter |
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| more targets to be |
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| you might encounter |
| |
| displayed in the same |
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| out of harbor and |
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| color, which may help |
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| adjusts the radar |
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| you to determine |
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| display accordingly. |
| |
| whether an object |
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• | Offshore — | is an actual target, |
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| automatically adjusts | or just background |
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| for high levels of sea | noise. Reducing |
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| clutter. | the color gain may |
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| provide better target |
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| detail and detection. |
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Tuning method | Related options | Description |
| • Rain — the radar |
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| scanner detects |
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| echoes from rain or |
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| snow. These echoes |
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| appear on screen |
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| as countless small |
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| echoes continuously |
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| changing size, |
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| intensity and position. |
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| Turning the rain |
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| clutter function on |
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| suppresses the bulk |
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| effect of rain returns |
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| from around your |
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| vessel, making it |
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| easier to recognize |
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| other objects. |
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| • Sea Gain — radar |
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| echoes from waves |
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| around your vessel |
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| can clutter the center |
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| of the radar picture, |
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| making it difficult |
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| to detect real targets. |
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| Adjusting the sea gain |
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| reduces this clutter for |
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| up to 5 nautical miles |
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| (depending on wave |
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| and sea conditions) |
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| from your vessel. |
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| • SuperHD Controls |
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| — for SuperHD |
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| scanners only: |
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Using radar | 109 |
