Garmin ECHOMAP Plus 45cv Owners Manual PDF - Page 31

Allowing the device to adjust the range automatically keeps the bottom within the lower or outer third of the sonar screen, and can be useful for tracking a bottom that has minimal or moderate terrain changes. Manually adjusting the range enables you to view a specified range, which can be useful for tracking a bottom that has large terrain changes, such as a drop-offs or cliffs. The bottom can appear on the screen as long as it appears within the range you have set. 1 From a sonar view, select MENU > Range. 2 Select an option: • To allow the chartplotter to adjust the range automatically, select Auto. • To increase or decrease the range manually, select Up or Down. TIP: From the sonar screen, you can select or to manually adjust the range. TIP: When viewing multiple sonar screens, you can select SELECT to choose the active screen. Sonar Appearance Settings From a sonar view, select MENU > Sonar Setup > Appearance. Color Scheme: Sets the color scheme. A-Scope: Displays a vertical flasher along the right side of the screen that shows instantaneously the range to targets along a scale. Edge: Highlights the strongest signal from the bottom to help define the hardness or softness of the signal. Fish Symbols: Sets how the sonar interprets suspended targets. Shows suspended targets as symbols and background sonar information. Shows suspended targets as symbols with target depth information and background sonar information. Shows suspended targets as symbols. Shows suspended targets as symbols with target depth information. Sonar Alarms NOTE: Not all options are available on all transducers. From an applicable sonar view, select MENU > Sonar Setup > Alarms. You can also open the sonar alarms by selecting Settings > Alarms > Sonar. Shallow Water: Sets an alarm to sound when the depth is less than the specified value. Deep Water: Sets an alarm to sound when the depth is greater than the specified value. FrontVü Alarm: Sets an alarm to sound when the depth in front of the vessel is less than the specified value, which can help you avoid running aground (Setting the FrontVü Depth Alarm, page 26). This alarm is available only with Panoptix FrontVü transducers. Water Temp.: Sets an alarm to sound when the transducer reports a temperature that is 2°F (1.1°C) above or below the specified temperature. Fish Fish: Sets an alarm to sound when the device detects a suspended target. • sets the alarm to sound when fish of all sizes are detected. • sets the alarm to sound only when medium or large fish are detected. • sets the alarm to sound only when large fish are detected. 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 23. 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 various water depths. This setting also reduces the noise near the surface of the water. Transducer Installation Settings NOTE: Not all options and settings apply to all models and transducers. From a sonar view, select MENU > Sonar Setup > Installation. Restore Sonar Defaults: Restores the factory default settings for the sonar view. Transducer Type: Allows you to select the type of transducer that is connected to the device. Flip Left/Right: Changes the orientation of the SideVü sonar view when the transducer is installed backward. Flipped: Sets the orientation of the Panoptix sonar view when the transducer is installed with the cables pointing toward the port side of the boat. Beam Width: Sets the width of the Panoptix transducer beam. Narrow beam widths allow you to see deeper and farther. Wider beam widths allow you to see more coverage area. Use AHRS: Allows the internal attitude heading and reference system (AHRS) sensors to detect the installation angle of the Panoptix transducer. When this setting is turned off, it is assumed the transducer is installed at a 45-degree angle. Sonar Frequencies NOTE: The frequencies available depend on the chartplotter, sounder modules, and 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 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. CHIRP frequencies allow you to sweep each pulse through a range of frequencies, resulting in better target separation in deep water. CHIRP can be used to distinctly identify targets, like individual fish in a school, and for deep water applications. Sonar Fishfinder 25