Garmin echoMAP CHIRP 74sv Owner's Manual

color schemes provide color assignments to the low intensity 

returns that are similar to the background color.

Appearance: See 

Overlay Numbers: Sets the data shown on the sonar screen.
Advanced: See 

Installation: Restores the default sonar settings.

From a RealVü sonar view, select MENU > Sonar Setup.
Point Colors: Sets a different color palette for the sonar return 

points.

Bottom Style: Sets the style for the bottom. When you are in 

deep water, you can set this setting to the Points and 

manually set the range shallower.

Bottom Colors: Sets the color scheme for the bottom.
Color Key: Shows a legend of the depths the colors represent.
Overlay Numbers: Sets the data shown on the sonar screen.
Installation: Configures the transducer (

).

From a LiveVü sonar view, select MENU > Sonar Setup.
Color Scheme: Sets the color palette.
Bottom Fill: Colors the bottom brown to distinguish it from the 

water returns.

Trails: Sets the how long the trails appear on the screen. The 

trails show the movement of the target.

Grid Overlay: Shows a grid of range lines.
Noise Rejection: Reduces the interference and the amount of 

clutter shown on the sonar screen.

Scroll History: Shows the sonar history in a traditional sonar 

view.

Overlay Numbers: Sets the data shown on the sonar screen 

).

Installation: Configures the transducer (

).

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.

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 

.

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.

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.

Shift: Allows you to set the depth range on which the sonar is 

focused. This enables you to zoom in to an area within the 

focused depth.

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.

NOTE: Some settings require external accessories.
Select 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.

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: 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.

NOTE: Not all models support sonar recording.

Insert a memory card into the card slot.

Sonar

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