Bedienungsanleitung Garmin VOLVO PENTA GLASS COCKPIT Gpsmap 722 (Seite 38 von 74) (Englisch)

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Sonar Frequencies

NOTE: The frequencies available depend on the device and

trandsucers 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 frequencies.

Some 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.

NOTICE

Always be aware of local regulations on sonar frequencies. For

example, to protect orca whale pods, you might be prohibited

from using frequencies between 50 to 80 khz with in ½ mile of

an orca whale pod. It is your responsibility to use the device in

compliance with all applicable laws and ordinances.

Selecting the Transducer Frequency

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

transducers.

You can select which frequencies appear on the sonar screen.

NOTICE

Always be aware of local regulations on sonar frequencies. For

example, to protect orca whale pods, you might be prohibited

from using frequencies between 50 to 80 khz with in ½ mile of

an orca whale pod. It is your responsibility to use the device in

compliance with all applicable laws and ordinances.

From a sonar view, select Menu > Frequency.

Select a frequency suited to your needs and water depth.

For more information on frequencies, see (Sonar

Frequencies, page 30).

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.

From a sonar view, select Menu > Frequency.

Select Manage Frequencies > New Preset.

Enter a frequency.

Turning On the A-Scope

NOTE: This feature is available in the Traditional sonar views.

The a-scope is a vertical flasher along the right side of the view,

showing you what is underneath the transducer right now. You

can use the a-scope to identify target returns that may be

missed when the sonar data is quickly scrolling across the

screen, such as when your boat is moving at high speeds. It can

also be helpful for detecting fish that are close to the bottom.

The a-scope above shows fish returns and a soft bottom

return .

From a sonar view, select Menu > Sonar Setup >

Appearance > A-Scope > On.

Select a hold time.

You can increase the hold time to increase the length of time

the sonar returns are displayed.

Panoptix Sonar Setup

Zooming in a Panoptix LiveVü or LiveScope Sonar

View

You can zoom in on the Panoptix LiveVü and LiveScope 2D

sonar views.

NOTE: The scrolling history is hidden while the screen is in

zoom mode.

From a Panoptix LiveVü or LiveScope 2D sonar view, spread

two fingers apart to zoom in on the area.

An inset window appears and displays a small version of

the full-screen image. The boxed area in the inset shows

the location of the zoomed area.

If necessary, tap or drag withing the inset window to view a

different area of the full-screen view.

If necessary, spread two fingers apart to zoom in.

If necessary, pinch two fingers together to zoom out.

To exit zoom mode, select Back or pinch two fingers together to

zoom out until the screen returns to a full-screen view.

Adjusting the RealVü Viewing Angle and Zoom Level

You can change the viewing angle of the RealVü sonar views.

You can also zoom in and out of the view.

From a RealVü sonar view, select an option:

• To adjust the viewing angle diagonally, select .

• To adjust the viewing angle horizontally, select .

• To adjust the viewing angle vertically, select .

• To adjust the viewing angle, swipe the screen in any

direction.

• To zoom in, spread two fingers apart.

• To zoom out, pinch two fingers together.

30 Sonar Fishfinder

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