NOTE: When the bottom lock feature is enabled, the Range feature changes to Span.

•To set the depth range of the magnified area manually, select Set Zoom, select View Up or View Down to set the depth range of the magnified area, and select Zoom In or Zoom Out to increase or decrease the magnification of the magnified area.

•To set the depth and zoom automatically, select Set Zoom > Auto.

•To cancel the zoom, select No Zoom.

Setting the Scroll Speed

You can set the rate at which the sonar image moves across the screen. A higher scroll speed shows more detail, especially while moving or trolling. A lower scroll speed displays sonar information on the screen longer. Setting the scroll speed on one sonar view applies to all the sonar views.

1From a sonar view, select Menu > Sonar Menu > Sonar Setup > Scroll Speed.

2Select 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 DownVü or SideVü 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 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. Chirp generally performs better than single frequency applications. Because some fish targets may show up better using a fixed frequency, you should consider your goals and water conditions when using Chirp.

Some sonar black boxes and transducers also provide the ability to customize preset frequencies for each transducer element, which enables you to change the frequency quickly using the presets as the water and your goals change.

Viewing two frequencies concurrently using the split-frequency view allows you to see deeper with the lower frequency return and, at the same time, see more detail from the higher frequency return.

Selecting Frequencies

NOTE: You cannot adjust the frequency for all sonar views and transducers.

You can indicate which frequencies appear on the sonar screen.

1From a sonar view, select Menu > Sonar Menu > Frequency.

2Select a frequency suited to your needs and water depth.

For more information on frequencies, see Sonar Frequencies.

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.

1From a sonar view, select Menu > Sonar Menu > Frequency.

2Select Manage Frequencies > New Preset.

3 Enter a frequency.

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 Menu > Sonar Setup > Appearance > A-Scope> On.

Selecting the Transducer Type

Before you can select the transducer type, you must know what kind of transducer you have.

If you are connecting a transducer that was not included with the chartplotter, you may need to set the transducer type to make the sonar function properly. If the device automatically detected your transducer, this option does not appear.

1From a sonar view, select Menu > Sonar Setup > Installation > Transducer Type.

2Select an option:

•If you have a 200/77 kHz, dual-beam transducer, select Dual Beam.

•If you have a 200/50 kHz, dual-frequency transducer, select Dual Frequency.

•If you have another type of transducer, select it from the list.

Sonar Setup

NOTE: Not all options and settings apply to all models, sounder modules, and transducers.

Sonar Settings

From a sonar view, select Menu > Sonar Menu > Sonar Setup.

Scroll Speed: Sets the rate at which the sonar scrolls from right to left (Setting the Scroll Speed).

In shallow water, you can select a slower scroll speed to extend the length of time the information is displayed on screen. In deeper water, you can select a faster scroll speed. Automatic scroll speed adjusts the scrolling speed to the speed the boat is traveling.

Noise Reject: Reduces the interference and the amount of clutter shown on the sonar screen (Sonar Noise Rejection Settings).

14

Sonar