Manual Garmin GPSMAP 8700 SERIE (page 37 of 80) (English)

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increase or decrease the magnification of the magnified

area.

• To set the depth range of the magnified area manually,

select Manual.

If necessary, select Set Zoom to modify the zoom setting.

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 magnify one particular area of the screen, select

Magnify.

If necessary, select Magnify to increase or decrease the

magnification level.

TIP: You can drag the magnification box to a new location

on the screen.

• To zoom in on the sonar data from the bottom depth,

select Bottom Lock.

If necessary, select Span to adjust the depth and

placement of the bottom lock area.

To cancel the zoom, deselect the Zoom option.

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 until there is no

additional detail to show, at which point it starts stretching out

the existing detail. This can be useful while moving or trolling, or

when you are in very deep water where the sonar is pinging very

slowly. A lower scroll speed displays sonar information on the

screen longer.

For most situations, the Default setting provides a good balance

between a quickly scrolling image and less distorted targets.

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

Speed.

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 ClearVü or SideVü sonar views or searching for

structure, it is recommend to use the Auto setting.

• To scroll faster, select Up.

• To scroll more slowly, select Down.

Adjusting the Range of the Depth or Width Scale

You can adjust the range of the depth scale traditional and

Garmin ClearVü sonar views and the range of the width scale

for the SideVü sonar view.

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.

From a sonar view, select Menu > Range.

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 Noise Rejection Settings

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

Reject.

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.

Color Limit: Hides part of the color palette to help eliminate

fields of weak clutter.

By setting the color limit to the color of the undesired returns,

you can eliminate the display of undesired returns on the

screen.

Smoothing: Removes noise that is not part of a normal sonar

return, and adjusts the appearance of returns, such as the

bottom.

When smoothing is set to high, more of the low-level noise

remains than when using the interference control, but the

noise is more subdued because of averaging. Smoothing can

remove speckle from the bottom. Smoothing and interference

work well together to eliminate low-level noise. You can

adjust the interference and smoothing settings incrementally

to remove undesirable noise from the display.

Surface Noise: Hides surface noise to help reduce clutter.

Wider beam widths (lower frequencies) can show more

targets, but can generate more surface noise.

TVG: Adjusts the time varying gain, which can reduce noise.

This control is best used for situations when you want to

control and suppress clutter or noise near the water surface.

It also allows for the display of targets near the surface that

are otherwise hidden or masked by surface noise.

Sonar Appearance Settings

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

Color Scheme: Sets the color scheme.

Color Gain: Adjusts the intensity of colors (Adjusting the Color

Intensity, page 28).

A-Scope: Displays a vertical flasher along the right side of the

screen that shows instantaneously the range to targets along

a scale.

Depth Line: Shows a quick-reference depth line.

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.

Echo Stretch: Adjusts the size of the echoes on the screen to

make it easier to see separate returns on the screen.

When targets are difficult to see , echo stretch makes the

target returns more pronounced and easier to see on the

screen. If the echo stretch value is too high, the targets blend

together. If the value is too low , the targets are small and

more difficult to see.

Sonar Fishfinder 29

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Others manual(s) of Garmin GPSMAP 8700 SERIE

Garmin GPSMAP 8700 SERIE Installation Guide - English - 6 pages

Garmin GPSMAP 8700 SERIE Installation Guide - German - 8 pages

Garmin GPSMAP 8700 SERIE User Manual - German - 92 pages

Garmin GPSMAP 8700 SERIE User Manual - Dutch - 236 pages

Garmin GPSMAP 8700 SERIE Installation Guide - Dutch - 8 pages

Garmin GPSMAP 8700 SERIE User Manual - Dutch - 88 pages

Garmin GPSMAP 8700 SERIE Installation Guide - French - 8 pages

Garmin GPSMAP 8700 SERIE User Manual - French - 90 pages

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Garmin GPSMAP 8700 SERIE Manual

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