1 From a sonar view, select MENU > Sonar Setup > Scroll Sonar Settings NOTE: Not all options and settings apply to all models, sounder modules, and transducers. From a sonar view, select MENU > Sonar Setup . Depth Line : Shows a quick-reference depth line. Scroll Speed : Sets the rate at which the sonar scrolls from right to left. In shallow water you might want to slow the scroll speed to extend the length of time the information is displayed on screen. In deeper water you can increase the scroll speed. Range Lines : Shows the vertical lines indicating the distance to the right and left of the boat. This setting is available for SideVь sonar view. Color Scheme :
Sets the color scheme of the sonar view. This setting might be available in the Appearance menu. The high contrast color schemes provide darker color assignments to the low intensity returns. The low contrast color schemes provide color assignments to the low intensity returns that are similar to the background color. Appearance : See Sonar Appearance Settings , page 15 . Overlay Numbers : Sets the data shown on the sonar screen. Advanced : See Advanced Sonar Settings , page 15 . Installation : Restores the default sonar settings. Speed . 2 Select an option: To adjust the scroll speed automatically using speed-over- ground or water speed data, select Auto .
The Auto setting selects a scroll rate to match the boat speed, so targets in the water are drawn with the correct aspect ratio and appear less distorted. When viewing Garmin ClearVь or SideVь sonar views, it is recommend to use the Auto setting. To use a very fast scroll speed, select Ultrascroll® . The Ultrascroll option quickly scrolls new sonar data, but with a reduced image quality. For most situations, the Fast option provides a good balance between a quickly scrolling image and targets that are less distorted. Sonar Frequencies NOTE: The frequencies available depend on the transducer being used.
Adjusting the frequency helps adapt the sonar for your particular goals and the present depth of the water. Higher frequencies use narrow beam widths, and are better for high-speed operation and rough sea conditions. Bottom definition and thermocline definition can be better when using a higher frequency. Lower frequencies use wider beam widths, which cover a larger area and can let the fisherman see more targets, but could also generate more surface noise and reduce bottom signal continuity during rough sea conditions. Wider beam widths generate larger arches for fish target returns, making them ideal for locating fish.
Wider beam widths also perform better in deep water, because the lower frequency has better deep water penetration. They can be used to search for structures such as brush piles. Sonar Appearance Settings From a sonar view, select MENU > Sonar Setup > Appearance . Color Scheme : Sets the color scheme. Edge : Highlights the strongest signal from the bottom to help define the hardness or softness of the signal. A-Scope : Displays a vertical flasher along the right side of the screen that shows instantaneously the range to targets along a scale. Pic. Advance :
Allows the sonar picture to advance faster by drawing more than one column of data on the screen for each column of sounder data received. This is especially helpful when you are using the sounder in deep water, because the sonar signal takes longer to travel to the water bottom and back to the transducer. The 1/1 setting draws one column of information on the screen per sounder return. The 2/1 setting draws two columns of information on the screen per sounder return, and so on for the 4/1 and 8/1 settings. Fish Symbols : Sets how the sonar interprets suspended targets. Selecting Frequencies NOTE: You cannot adjust the frequency for all sonar views and transducers.
You can indicate which frequencies appear on the sonar screen. 1 From a sonar view, select MENU > Frequency . 2 Select a frequency suited to your needs and water depth. For more information on frequencies, see Sonar Frequencies , page 15 . Creating a Frequency Preset NOTE: Not available with all transducers. You can create a preset to save a specific sonar frequency, which allows you to change frequencies quickly. 1 From a sonar view, select MENU > Frequency . 2 Select Add . 3 Enter a frequency. Advanced Sonar Settings NOTE: Not all options and settings apply to all models and transducers. From a sonar view, select MENU > Sonar Setup > Advanced . Interference :
Adjusts the sensitivity to reduce the effects of interference from nearby sources of noise. The lowest interference setting that achieves the desired improvement should be used to remove interference from the screen. Correcting installation issues that cause noise is the best way to eliminate interference. Surface Noise : Hides surface noise to help reduce clutter. Wider beam widths (lower frequencies) can show more targets, but can generate more surface noise. Color Gain : See Adjusting the Level of Detail , page 14 . TVG : Adjusts the appearance of returns to compensate for weakened sonar signals in deeper water, and reduces the appearance of noise near the surface.
When the value of this setting is increased, the colors associated with low-level noise and fish targets appear more consistent through Turning On the A-Scope NOTE: This feature is not available in all sonar views. The a-scope is a vertical flasher along the right side of the full- screen sonar view. This feature expands the most recently received sonar data so that it is easier to see. It can also be helpful for detecting fish that are close to the bottom. From a sonar view, select MENU > Sonar Setup > Appearance > A-Scope . Sonar Setup NOTE: Not all options and settings apply to all models and transducers. Sonar 15