Bedienungsanleitung Eagle FISH I.D (Seite 10 von 16) (Englisch)

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With

high sensitivity settings,

a second bottom echo

(second echo) may

appear.

This is normal. It's caused

the

returning signal reflecting

off

the surface

of the water. Then it makes a second

trip

to the bottom and

back

again.

Remember,

when

the unit's automatic feature is

on,

the receiver's sen-

sitivity automatically adjusts

to the

surrounding

conditions. The micro-

computer places

at a level

slightly

above the minimum

required

pick

the bottom

signal. However,

ft's

possible

change

the

sensitivity

level while

the unit is

automatic. This

may

be desirable if the sensitiv-

ity

level is not

high

enough

to show fish or other small detail. The unit

will increase the

sensitivity

pick up

the bottom

signal,

then add in the

level

you programmed.

adjust

the

sensitivity

while the unit is in

automatic, simply press

the

SENS.

key.

Then

press

either the

arrow

key

to increase

it,

or the

down arrow

key

to decrease it. As

you press

the arrow

key,

the

sensitivity

bar moves

down, according

to the

sensitivity

level

chosen.

You can

adjust

the

sensitivity

in the same manner when the unit is in the

manual mode.

Both 8

degree

and

degree

transducers

give

accurate bottom read-

ings,

even

though

the bottom

signal

is much wider on the 20

degree

model.

This is because

you

are

seeing

more of the bottom. Remem-

ber,

the shallow

edge

of the

signal

shows

you

the true

depth.

The rest

of the

signal

tells

you

whether

you

are over

rocks, mud,

etc.

SIGNAL INTERPRETATION

Your unit

gives

an accurate

picture

of the bottom that

your

boat is

pass-

ing.

A bottom of firm

sand,

gravel,

shell,

hard

clay

returns a wide

bottom

signal.

If the

automatic feature is off and the bottom

signal

nar-

rows

then it means that

you

have moved

over a mud bottom. Mud

absorbs

the sound wave and returns a weak

signal.

Turn

the

sensitivity

to see a better bottom

signal.

Big

rocks or

stumps

on a smooth bottom send back

signals

above the

bottom level

signal.

The

height

of the

signal depends

on the

target's

height.

you pass

over a

post,

it should be

clearly

visible as a short

line

extending

above

the bottom

signal.

steep slope

returns a wide

signal,

the

steeper

the wider.

Signals

returned from

high

underwater cliff are

usually

the widest of all.

Brush

usually

lies on the bottom and shows

clumps rising

above

the bottom

signal.

Brush

signals

look similar to

large

rocks;

however

their

signal

is not as

strong

as rock.

FISH ARCHES

Fish arches are created when the cone of sound

passes

over

a fish.

The distance to a fish when the cone first

strikes ft is shown as

"A"

the next

page.

When the center of the cone strikes the

fish,

the

distance is

shorter,

as shown

in "B".

As the cone leaves the

fish,

the

distance

increases

again

as shown in "C".

When the Fish l.D.

feature is

off,

the

depth

of the water will affect the

size

and

shape

of the fish arch due to the cone

angle

diameter. For

example,

the cone

passes

over a fish in shallow

water,

the

signal

displayed

on the unit

may

not arch at all. This is due to the narrow cone

diameter and

the resolution limitations of the

display.

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