A sonar screen is a map from echo strength to color. The palette and the curve decide how that map looks, and they change what you can see.
At a glance
- Four preset palettes plus a custom one
- Four preset color curves; up to 10 custom curves can be saved to a P-Setting
- No dents for bottom discrimination
- A linear curve for pelagic fishing
About 7 minutes. Part of Tune the picture.
Palettes
The CSH-10 has four original palettes, and you can build your own by adjusting each color. The background color is the lowest color on the scale.
Color curves
The curve defines how echo strength turns into color. There are four default patterns, and you can create custom ones; up to 10 can be saved to a P-Setting, so save a curve after you build it.
What Furuno recommends
- For bottom discrimination and tonnage estimation, do not add a dent to the curve.
- For pelagic fishing with no bottom echo, a linear curve with no dents is suggested.
- A slight S-curve can prevent unwanted reflections and make weak echoes stronger. An excessive S-curve hides information about echo strength.
Check yourself
Three questions
Sources
- CSH10 Explanation of User Settings: Color settings and color curve setting
This lesson summarizes Furuno's public documents in our own words. Limits and settings differ by model and software version, so your own manual and your installer have the last word. OmniCSH is an independent project, not a Furuno program.