Manual Garmin Fishfinder 90 (page 10 of 32) (English)

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4 Fishnder 90/140 Owner’s Manual

Getting Started

The Fishnder 90 and 140 include the latest technology

in interpreting bottom signals; they can see through sh,

structures, and thermoclines (shown in the weakest hues).

Even so, large schools of sh or dense structures close to

the bottom can affect water depth return readings.

NOTE: If the Fishnder is unable to track the bottom for

any reason, the digits which indicate depth ash on and off

to alert you that the Fishnder is not tracking the bottom.

Along the top of the screen, you might see a grouping of

intense hues. This area is surface clutter, which can be

caused by waves or any other sonar interference at the

surface of the water. Too much surface clutter can obscure

your view of sh. You can turn down the Gain setting to

reduce this surface clutter (page 15).

You can see in the previous illustration how the sh are

indicated in a few different ways. By default, sh appear

as arches. Actual sh returns might not always appear as

perfect arches, due to the speed, sh orientation, or other

conditions. You can also turn on the Fish Symbols setting if

you want to see suspended targets indicated by a sh shape

instead of arches (page 17).

Using Simulator Mode

Use Simulator Mode to practice and learn the operation of

the Fishnder. If the Fishnder does not detect a transducer

at startup, it automatically starts in Simulator Mode.

While in Simulator Mode, the Fishnder displays a bottom

scene, and you can control the Fishnder (except the Gain

and Auto Gain options) just as if it were on the water.

If no keys are pressed for two minutes, the Fishnder

automatically resets to default settings while in Simulator

Mode.

To exit Simulator Mode, turn off the Fishnder.

190-00582-10_0A.indd 4 12/2/2011 3:08:55 PM

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Garmin Fishfinder 90 Manual

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