Lowrance electronic X-25 User Manual

X-25

INSTALLATION

AND OPERATION

INSTRUCTIONS

INC.

LITHO IN

U.S.A.

988-0105-33

LOWRANCE

12000 E. SKELLY

ELECTRONICS,

DR.,

TULSA,

OK 74128

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TABLE OF CONTENTS

INTRODUCTION 1
INSTALLATION

POWER CONNECTIONS 2
SPEED/TERMPERATURE SENSOR

KEYBOARD BASICS 4
DISPLAY

MENUS 5
OPERATION 6

AUTOMATIC 6
RANGE 6

-

ZOOM

Automatic

ZOOM- Manual

SENSITIVITY 9
GRAYLINE® 9

FISH ID 10
CHARTSPEED 11

DISPLAY MODE

ALARMS 14

FISHALARM
DEPTH

ALARMS

LAMP
FEET/METER

DISPLAY CONTRAST 16

ASP

(Advanced Signal Processing)

TRANSDUCERS AND CONE ANGLES 17

SIGNAL INTERPRETATION 18

FISH ARCHES 19

WATER

SURVEYING A LAKE
SONAR TROUBLESHOOTING 23

TEMPERATURE

BAIT FISH 22

Operation

Operation

AND

THERMOCLINES

1

3
5

7
8

12
14

14
15

15
16

20
22

Copyright

All features and

©

specifications subject

1990,

All

rights

Lowrance

reserved.

Electronics,

to

change

without notice.

Inc

All screens in this manual are simulated.

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26

4. The boat must be

Is

motionless,

lines.

fish

moving

in the

stay

ELECTRICAL NOISE
A

sonar's

completely
or not at all.

cause of sonar

major

display

as random

cover the screen with black

at

aslowtrolling

cone, showing

problems

patterns

to seefish arches. If the boat

speed

on the

display

is electrical noise. This

of dots or lines. In severe

or cause the unit

dots,

as

straight

horizontal

usually appears

cases,

operate

erraticly,

on the

it can

To eliminate or minimize the effects of electrical

cause. With the boat at rest in the
electrical

yourX-25

a

equipment
turn on the

turn the
all electrical

noted,

If

you

or

power

interference. VHF radio antenna cables radiate noise when
certain to

unit's

If no noise

certain

Increase the RPM with the

the

wiring. Try using resistorspark plugs,

power
the

supplied

equipment

on,

steady

bottom

on the boat and view the effect on the sonar's

bilge pump

pump

equipment

then turned off.

find noise interference from an electrical

radio, try

problem

battery helps

to isolate the

cable and transducer cable

keep

powercable

displays

everything except

could be one of three

cable

away

with the unit when

on the boat off. Make certain the

then turn off ASP

signal

(Advanced Signal Processing).

on the

display.

and viewthe

then turn on the VHF radio

off,

has been turned

problem.

the sonar's wires

directly

to the

away

batteryto

on the sonar unit from electrical

the sonar unit is turned

gearshift

from

engine wiring. Again, routing

eliminate noise

problems.

wiring

the first

water,

Now turn on each

sonardisplayfor

and transmit.

their effect on the sonar

on,

instrument,

You can

away

usually

from the

from it. You

isolate it from

in neutral. If noise

things; spark plugs,

alternatorf

Make certain to use the in-line fuse

power

cable to the

the

first

noise,

thing you

engine

display.

noise. If no noise is

trolling

re-route the sonar unit's

wiring

need to route the sonar

may

otherwiring

equipment,

then start the

off,

appears

alternator,

or

lIters,

the

routing

power

battery.

to determine the

try

should do is

is

also. Turn

off,

There should

of electrical

piece

For

example,

Keep doing

motor,

is

that

causing

transmitting,

on the

then make

on the

ortachometer

the sonar unit's

cable

directly

turn all

be

present,

this until

display

pump,

the

so be

boat.

engine.

display,

to

with limited

in shallow

all boat

then the

speeds.

When no noise
noise source is

experience

orwhen the boat is at rest. In

water,

appears

probably

make

on the sonar unit after all of the above tests,

sonar installations which function

hasty

will be the location and/or
must be

Read

your

in a location that has a smooth flow of water at

placed

transducer owners manual for the best

cavitation,

nearly

of the transducer.

angle

Many

all

cases,

novices or

persons

perfectly

the cause of the malfunction

The face of the transducer

mounting position.

25

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Weak bottom

2. Electrical

the sonar to

This can cause the
from the

3. The water
sonar can't find the
flash

continuously.

are in. If this

you

to a realistic one,

range

move Into shallower water,

you

4. Check the
also

drops,

Bottom echo
bottom echo

1. The

flow of water
water

disrupt

other

targets.

2. Electrical noisefromthe boat's motorcan

the sonarto

This can causethe unit to eliminate

the

from

and transducer cables

echo, digital readings

noisefromthe

automatically

display,

may

happens, place

battery

reducing

disappears

while boat is

transducer

in orderforthe sonar

the sonar

The technical term

automatically

display. Try using resistorspark plugs

boat's motorcan interfere with the

increase

unit to eliminate

be

deeper

bottom

It

may change

voltage,

its

may

than the sonar's

signal

(for example,

lithe

to find the bottom or

ability

at

high speeds

moving

be in turbulent

signals, interfering

increase its Discrimination

from

away

erratic,

its Discrimination or noise

weakersignals

while it's in the

the

range

the unit in the manual mode,

0-100

a bottom

voltage drops,

water. It must be mounted in a smooth

to work at all boat

for this is 'Cavitation'.

weakersignals

other electrical

fish

or no

such

ability

automatic

to limits far

and increase the

feet)

should

signal

or erratic

with its

interfere with the sonar. This

such asfish oreven

or

routing

wiring

signals (cont.):

sonar. Thiscauses

rejection

as fish or even structure

to find the bottom. If

the

mode,

greaterthan

then

sensitivity.

appear.

the unit's transmitter

targets.

digItal reading

bubbles in the

speeds.

ability

or noise

Air

to find the bottom

rejection

Ihe sonar

on the boat.

feature.

digital

water

the

change

power

or weak

causes

feature.

structure

unit's

power

the
will

the

As

or

INTRODUCTION

Thank
quality

These

s.

you

sonar

units have an automatic feature

bottom, fish,

However,

key.

the

press
easy-to-use

To
where
road.

get

started

it all

After

rest of the
will

perform

water.

the

INSTALLATION
Mount the X-25 in

it's tilted for the best

when

allow wood screw or
place a piece

the

panel.

the

power

for

purchasing

designed

structure,

if

you

menu

key.

menus.

with

begins, Improper

for

read the

you.

you've

manual. The more

any

a

Lowrancq

for both

and morel

wish to fine tune
The X-25 has

first read the

unit,

your

installation

instnjctions,

you

Take this

convenient location,

viewing angle.

through

of

plywood

Make certain there

and transducer cables.

bolt

on the back

sonar. Your X-25 is a

professional

All

powerful

know about

manual for reference when

mounting.

is

enough

and novice fishermen.

that finds and

have to do is

you

the

unit,

all

displays

you

features available

installation section.

can cause
install the

provided

Holes in the bracket's

side of thin

your

It

may

problems

unit,

unit,

there is clearance

be

panels

room behind the unit

press

have to do is

then read the

the

necessary

to 'reinforce

high

the

the

down

better it

you

to attach

on

through

This is

the

head for

base

to

fish arches when the Fish ID feature

No

1. Make

common
owner's

2. The

arch,
until It

when

3. Use the

in on
better luck

This

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certain the transducer is

problem

manual for more information.

sensitivity may

if a

partial

not be

arch is

high

displayed.

enough.

it has to be able to receive the fish's

leaves. If the

it is in the center of the cone.

Zoom feature. It is much easierto

a small

seeing

enlarges

sensitivity

of waterthan a

range

fish arches with a

the

targets, allowing

is not

large

30 to 60 foot

the

24

Is off:

pointing

high enough,

straight

In orderforthe unit to

echo from the time it enters the

display

one. For

display

down. This is the most

See the Fish Arch section in

the unit

example, you

range

show much more detail.

to

displays

arches when zoomed

fish

than aD to 60 foot

your

the fish

range.

a fish

cone

only

display

will have much

Drill a hole in the dash for the
location

way,

and transducer cables can
can't

for this hole is

the bracket

pass a power

immediately

covers the hole. The smallest

pass through

or transducer connector

power

1

and transducer cables.

under the

gimbal

bracket.

hole both the

one

is

inch. However,

and another cable

The best

This

power

you

through

a one inch hole.

connector

cable down

power

over the

in

POWER CONNECTIONS

The
run the
cable
will
not

hole,

the bracket.

X-25 works from a 12 volt DC

power

away

the best

give
long enough

to it. You can attach

however,
page

This unit
power

wires are

you may

25 for more information on

has reverse

wires are reversed.

attached

TherefOre,

up

through

the hole from

from the front side

then route the transducer and

Finally,

cable

from

fasten the

directly

other boat

isolation from electrical noise. If the

to reach

the

have

polarity protection.

correctly.

after

drilling

under the dash. Then

bracket to the dash.

system

to the boat's

wiring, especially

the

battery; splice

cable to an

power

problems

However,

with electrical interference.

electrical noise.

the

hole,

the transducer

pass

drop

the

of the dash. Slide the bracket

cables out the slots

power

the

only.

battery.

the

#18

accessory

No

damage

will

unit

For the best

Keep

engine's

supplied

gauge

or

will occur if the

not work until the

results,

the

power

wires. This

cable is

insulated wire

power buss,

See

IMPORTANT

SERVICE

If

unit is not

your

troubleshooting

tomerservice
the How To Obtain Service section on

SONAR

Unit won't turn on:

I.

Check the

2. Make

to the

positive battery

3. Check the

4. Measurethe

ii volts. If it

on the terminals are

working,

section before

department.

TROUBLESHOOTING

cable's

power

certain the

isn't, thewiring

power

terminal,

fuse.

batteryvoltage

corroded,

INFORMATION!

or if

need

you

contacting

It

maysave you

connection at the unit. Also check the

cable is wired

black to

atthe unit's

to the unit is

or the

technical

a service

the trouble of

26 if

page

properly.

negative

powerconnector.

defective,

battery

needs

help, please

center or the

need service.

you

The red wire connects

or

ground.

the

batteryterminals

charging.

use the

factory

returning yourunit.

It

should be at least

following

cus-

See

wiring.

orwiring

TO

SPEED!

TEMP

SENSOR

2

RED

WIRE

3

amp

FUSE

Unit

freezes,

1. Electrical noise from the

interfering

from other electrical
cable

directly

2.

Inspect

3.

Check both the

securely plugged

Weak bottom

1. Make certain transducer is

transducer.

its effectiveness. If the

shooting through only
hull. Do NOT use RN silicone

locks

with the sonar unit.

to the

the transducer cable

echo, digital

Oil,

dirt,

or

up,

operates erratically:

boat's

Re-routing

on the boat

wiring

battery

transducer and

in to the unit

and fuel can cause afilmto form on the

instead of

readings

transducer is mounted inside the

one

layer

motor,

trolling
the

power

may help.

through

for

breaks, cuts,
power

erratic,

pointing straight

of

fiberglass

rubber adhesive or Marinetexid.

a fuse block or

connectors. Make certain

and that it is

23

or an

motor,

and transducer

Route the

or

pinched

or no fish

down. Clean the face

signals:

transducer,

securely

accessory may

cables

sonar unit's

ignition

wires.

hull,

bonded to the

away

power

switch

both are

of the

reducing

be sure it is

be

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SURVEYING A LAKE

SPEED/TEMPERATURE

(Requires

OPTIONAL

SENSOR INSTALLATION

LST-T

Speed/Temp

Sensor)

The most successful

it

after

day

spots
ence

want at

change throughout
food,

With the

day

that

produce

where,

and at what

season. And

any

and other factors.

X-25,

the areas where fish are

lake!

The most efficient
to

survey

and indicate
As

type

Keep

it with

you go

about

of bottom.

a few marker

the

anglers

and

after

year

fish

consistently. They

depth, they

the

year depending

anyone

can eliminate

to

way

X-25. Start

your

promising

survey, your

your

likely

become

It will also reveal

buoys

the X-25 indicates a school

school thus
exactly

a

you may

the

lake. Unless

big

not be able to find it

marked,

right spot.

can make

you

This is essential when

mark the school

you

on

any body

year. Eventually, they

of water are those who fish

discover

can

expect

realize that these

they

on water

guesswork

to be. Even

if it's the first time on the

acquainted

with a

in relation to landmarks on shore.

spots

map

X-25 will tell

suspended

in the

boat, ready

of

fish,

throw the

turn and

your

of fish when

again.

learn the hot

through experi-

to find the fish

productive

level, temperature,

and concentrate on

with a

body

of the

lake,

the

you

fish.

depth

they

areas

of water is

if

possible,

and

to toss overboard. When

out. With the

buoy

come back to fish in

far from shore on

you're

you're

over

it,

Mount the

speed/temp

where the flow of water

of turbulence

and air bubbles in the chosen location.

side of the transom is
can be used

strakes, ribs,

the

speed

mounted six to twelve

sensor must

if

necessary.

or thru-hull

sensor. In a

always

sensor on the boat's transom

is the smoothest.

preferred,

fittings.

typical

inches from the centerline of the

in

be

however,

Do not mount the

These will disturb the

installation,

water to function

the

the chosen location is in the water even
boat is on

Once

transom. Make certain the

the

5/32"
four #10 stainless steel screws

caulking compound

with the bottom of the hull

If the base of the transom has a

transom and the sensor with

plane.
determine the

you

hull. Mark the transom

mounting

hole at

proper

each location. Mount the sensor to

to seal the screws.

location, place

sensor's bottom is flush with the

in four

places,

(not included).

and

tighten

caulking compound.

the screws.

radius,

a smooth water flow.

in a location

There should be a minimum

The

port (left)

the starboard

sensor behind

speed

(right)

side

flow of water to

the

speed

sensor

is

hull. The

certain

properly.

at

high speed

the sensor

Make

or when the

on the

bottom of

two in each slot.

Drill a

the hull with

Adjust

fill the

Use a
the sensor

between the

gap

This will

grade

good

so it is flush

help

insure

of

BAIT FISH
The

importance

sized.

They

Bait fish are the

shad. Bait fish can also
bluegill,

and bass.

of bait fish to successful

are the

principle

plankton

Most bait fish concentrate

promotes

of

fishing

feature

Usually, game

the

is to use the

a school of bait fish

off,

growth

of the

X-25

fish will be

fishing

food of all

feeding forage fish,

be the

young

within five feet of the surface where

plankton

tQ find the bait fish first. With the Fish ID

will

nearby,

of

on which

look like

often

game

game

directly

can't be

over-empha-

fish in most waters.

such as minnows and

such as

fish,

crappies,

sunlight

feed. One method

they

a "cloud" on the

beneath the school of

display.

Route the sensor cable to the

cable. The

speed/temp

sensor is now

in-line connector on the X-25's

for use.

ready

power

bait fish.

22

3

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KEYBOARD BASICS
The unit sounds a tone when

unit has

ON/CLEAR

Use this

menus from the screen.
OFF

This

MENU

accepted

key

turns

key

The X-25 has

UP and

Use these

DOWN ARROWS

keys

unit. Use these

more.

a command.

to turn the unit on. It also

the unit off.

menus of features that are accessed with this

many

to

adjust virtually every

to

keys

adjust

you press any key.

clears menu selections and the

feature and function on the

the

sensitivity,

chart

This tells

speed, range,

you

the

830

750

770

key.

760

and

750

680

560

500

470

NOTE: The
menus

chart, first make certain no menu is on the screen. Then

arrow

are

key.

top right portion

arrow

up

displayed.

The

chart will freeze and the word "STOP'

of the

also

key

In other

screen. To start the

and starts the chart when no

stops

words, anytime you

chart,

wish to

appears

press

key again.

4

stop

press

the

up

the

the

the

at

arrow

up

The

temperature

bottom.

warm

thickness of the thermocline can

In

Thermoclines are

and cool

deep

Layers

lakes there

where fish are active.

thermocline while

The X-25 can detect this invisible
will

probably

of water in the lake is

of different

layer

may

important

larger game

have to be turned

temperatures form,

of water is called a

be two or more at

to fishermen

times bait fish will

Many

vary

fish

layer

up

seldom constant from

and

thermocline. The

with the season

different

because

be above the

will

suspend

in

the

in or

water,

to see it.

21

the

or time of

depths.

they

lust

but the

top

junction

depth

are areas

below it.

sensitivity

to

of a

and

day.

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small fish

Very
show a

water.

partial arch,

Large

probably

fish will

to see the arch. Because of

clutter,
creased

One of the best

segment

the

thermoclines, etc.,

enough

01 the water. For

segment,

to

ways

the better the screen resolution will be. The

will

or

a

shape

arch,

fish arches.

get

to

get

not arch at all. Medium sized fish will

similar to an arch if

but turn the

water

conditions,

the

sensitivity

fish arches is to

example,

from 45 to 60 feet. The smaller

to do this on the X-25 is with the Zoom

the

echoes,

the

sensitivity up

on the screen. In medium to

display

If

you

fish

get

sensitivity.

making

fish arches.

see fish

symbols

it easier to see detail. For the best

as

signals

when the Fish ID. feature is

as

high

possible

deep water,

when the unit is in the manual

without

they're

sensitivity up

such as

sometimes cannot be in-

expand

feature. This feature

getting

this method should work to

on,

try increasing

in

deep

in

deeper

surface

heavy,

or

"zoom" a

easiest

expands

results,

too much noise

mode,

but don't

water

way

turn

the

DISPLAY
The

Three menus
(LAMP),

(DARK/LIGHT).

switch from feet to

menu
menu to

the down arrow to

onds. If
menus from the screen.

When the X-25 is first turned

below. The unit is in the automatic mode and the Fish ID feature is on.

The

ample,

shows at the

-

General

flash for about ten seconds when the X-25 is turned on.

lights

appear,

feet-meter selection

appears.

appear.

don't want to

you

depth range displays

the

range

top

one after the other. The menus are the

and contrast

the

up

key

to darken the

key

disappear

To turn the

meters,

To

Now

lighten

the

adjust

press

it. The menus

(FEET/METER),

on,

lights

press

contrast,

the

waft,

on,

press

the down arrow

arrow

up

the ON/CLEAR

press

the

display appears

wait for the DARK/LIGHT

on the left side of the screen. In this ex-

is from 0 to 60 feet. The

left

portion

of the screen.

digital

bottom

arrow

after a few sec-

lights

adjustment

To

key.

when the

key

similar to the one

proper

screen,

to clear the

depth display

'ii--

37,3FT

4-c

WATER TEMPERATU RE AND THERMOCLINES

Water

temperature

the activities of all fish. Fish are cold

always
colder water slows down their metabolism.

about a fourth as much food as
Most fish don't

narrow limits. The surface
identify

species.

other fish

cold
tolerance than

stay. Schooling

provides
here.

the

temperature

the desired surface water

Trout can't survive in streams

eventually

the summer. While some

during

this

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has an

of the

spawn

others,

temperature.

unless the water

die out when stocked in

each

fish

suspended

important-if

blooded and their bodies are

surrounding

consume in the summer.

they

temperature

spawning temperatures

has a certain

over

deep

We assume

20

not

controlling-influence upon

water.

At this

temperature

meter built into the X-25

During

tirrie, they

the

is within rather

for various

that

fish have a wider

range

they

too warm. Bass and

get

lakes that remain too

temperature

within which it tries to

water lie at the level that

are the most comfortable

winter,

need

helps

F

MENUS

The X-25 uses menus to

features. The menu
customize the unit to

have to do to leave one menu and enter

you
key repeatedly.

ON/CLEAR

key.

key

your particular

If

ever

you

This clears the menus from the

•1

a

-

guide you through

accesses these

lost in the

get

features, allowing you

needs and water conditions. All

menus,

5

the

unit's

another is

simply press

screen,

functions

the menu

press

and

to

the

Menus

change depending

the automatic mode is turned

on the mode the unit is in. For

the

off,

sensitivity

"AUTO SENS" to "MAN SENS." Other

menu boxes or new menus can
selections.

OPERATION

appear, again depending

menu

messages

example,

changes

may appear

on

previous

from

in

if

FISH ARCHES

Fish arches are created when the cone of sound

The distance

below. When the
shorter as shown "B". As the cone leaves the

increases

to a fish when the cone first strikes it is shown

center of the cone strikes the

fish,

as shown in "C".

again

passes

the distance is

fish,

distance

the

over a fish.

as "A"

AUTOMATIC

When the X-25

is

first turned

the auto-

on,

matic feature is enabled. This feature

automatically adjusts
sensitivity according

always keeps

in

the lower

the bottom

portion

To turn the automatic feature

menu
appears.

This

is now in the manual mode.
seconds and the menu
screen's left side.

until the AUTO/MAN menu

key

Now

highlights

the automatic feature on

time

press

the

the unit's

range

to water conditions.

displayed

depth

of the screen.

off,

press

the down arrow

press

the letters "MAN." The unit

Wait a few

up

arrow

will

Pressing

again, repeat

key.

off the

scroll

the ON/CLEAR

RANGE
You can't

is in the automatic mode. It is

when the unit is in the manual

however. To do
manual mode. Now

to clear the screen. Then

key

menu

key

appears
shows at the bottom of the menu.

case,
up

down arrow
you

as shown. The current

the

arrow

key

select the desired

adjust

the

so,

when the X-25

range

first

put

the

press

adjustable

mode,

the unit

ON/CLEAR

press

until the 'RANGE SEL" menu

range

In

is 60 feet.

range

to decrease the

increases the

key

Now

press

range,

range.

range, press

the

and

It

the

key.

the above

in

the

the

this

the

the

After

iiUTO

also clears it. To turn

key

steps, except

this

BOATS DIRECTION OF TRAVEL

A B C

When the Fish ID. mode is

size and

example,
displayed

cone diameter and the

shape

if the cone

on the X-25

the fish arch due to

Qf

passes

may

resolution limitations of the

the

off,

depth

the cone

over a

not arch at all.

fish in shallow

water will affect the

of the

diameter. For

angle

the

water,

signal

This is due to the narrow

display.

6

19

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Both 8
ings,

model. This is because

ber,

rest of the

SIGNAL INTERPRETATION
Your X-25

passing.

fairly

down,
absorbs the sound wave and returns a

sensitivity
Big

bottom level
height.

line

degree

even

the shallow

wide

then it means

rocks or

As

extending

and 20

though

signal

gives

A bottom of firm

signal.

to see a better bottom

stumps

signal.

you pass

above the bottom

degree

the bottom

of the

edge

tells

you

an

accurate

If the

that

on a smooth bottom send

The

over a

transducers

signal

are

you

signal

whether

picture

sand,

automatic mode is off and the

have moved overa mud bottom. Mud

you

height

post,

is much wider on the 20

seeing

shows
you

gravel,

signal.

of

the

it should be

signal.

accurate bottom read-

give

degree

more of the bottom. Remem-

the true

you

are over

of the bottom that

shell,

weak

signal

rocks, mud,

or hard

signal.

back

signals

depends

clearly

visible as a short

clay

Turn

depth.

your

signal

on the

The

etc.

boat is

returns a

narrows

the

up

above the

target's

ON/CLEAR
automatically

ZOOM

The zoom feature
the

automatic

the bottom
time

enlarging

track the bottom in

different.

-

Zoom

To zoom the

ZOOM

the unit into the zoom

shown on the

Automatic

menu

to clear the

key

clear.

enlarges

mode,

of the screen. This lets

all echoes

the manual

Operation

display,

appears.

right.

display.

all echoes on the

ittracks the bottom

that

appear

first

press

Now

press

mode. A new menu

If

you

see small

you

on the screen. The unit doesn't

and the

mode,

the MENU

the down arrow

wait a few

screen.

signal, always keeping

adjustments

until the RANGE/

key

immediately appears

seconds,

If

detail,

key.

the unit is

at the same

are

This

switches

will

it

in

it near

slightly

as

A

steep slope

returned from a

returns a wide

underwater

high

signal,

cliff are

the

steeper

usually

the wider.

the widest of all.

Signals

373FT

RANGE

et

31.4

FT

ZOOM

SIZE

a

TRACK

if

w-p.

ZM—— 20

•

t

•-

•i

C

This is the zoom size menu. Zoom

L r

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18

U

limit and the lower limit. The

upper
corner of the screen. The lower

example,
zoom window size is 30 feet. The

menu when

ing

if the

you

the bottom in a zoom

limit is 40 feet and

upper

first

activate the zoom. This means the

window,

size is the distance between

limit shows at the

upper

limit is in the bottom left corner. For

the lower limit is 70

word "TRACK"

always keeping

7

appears

X-25 is track-

it on the

the

left

top

feet,

in this

display.

the

Press the

zoom

size, press

increase the zoom size.

When the

mode,

arrow

up

unit is switched into the zoom

the tellers

to decrease the

key

the down arrow

"ZM"

appear

at the

key

of the screen. The zoom window size

displays

screen.

in the

top right

To turn the zoom feature

menu

apears.

This switches the unit into
feature off.

Zoom - Manual
To

operate

first

RANGE/ZOOM

the

automatically appears

change

until the RANGE/ZOOM

key

Now

press

the zoom feature

the menu

press

zoom mode. The zoom size menu

the zoom size

menu to

or down arrows. After

desired zoom

until the "MOVE ZOOM" menu
This menu lets
window

by pressing
can move

the

surface,

anywhere

where
bottom

you put

size,

you

or down in one foot increments

up

the arrow

the zoom window

down to the

in between. The window

it. It doesn't track the

signal.

corner of the

off,

the

up

the

Operation

Then

key.

place

next. You can
by pressing

select the

you

the menu

press

move the zoom

keys.

bottom,

the

press

menu

arrow

key.

range mode,

when the X-25 is in the manual

press

the X-25 in

the

key

appears.

Thus,

you

towards

up

or

stays ____________________

to

E

3IAFT

ZOOM

SIZE

top

Wa

2OFT

C

which turns the zoom

the down arrow

C

up

34I4FT

C

ZM——20

'-

mode,

in the

key

ZM——2O

TRANSDUCER CONE ANGLES

The sound waves from the transducer
cone

shaped

The

angle

Lowrance offers a choice

cone

angle.

cone

angle. Typically,

ideal for
cone

angle

feet of water the
The 8

degree

The 20

water,

ment, (300

is more desirable. Since the

angle

smaller

beam. This looks much

between the outside

The transducer

wide cone

operating

allows

degree

the 8

feet - fresh

area,

in shallow to medium

to see more of the

you

20

degree

transducer covers

transducer is almost

degree mostly

water,

it can

penetrate

edges

of transducers with either

supplied

angle

cone covers

only

always

in salt water.

100 feet

sound

to much

spread

like the beam from

of the cone is the cone

with the

about

-

deeper depths..

out into the water

a

flashlight.

angle.

an 8 or 20

X-25 has a 20

transducers

water

underwater world. In 15

an area about six feet across.

a two foot circle.

(20 degrees)

depths.

The 20

the best to use

In a

salt

water)

energy

water environ-

deep

the narrow

is concentrated

degree

degree

degree

in

fresh

cone

50'

100'

in a

are

in a

To turn the zoom feature

ZOOM menu

appears.

the unit into the

range

Now

mode,

off,

press

press

which

the menu

the

up

turns

arrow

the

until the RANGE/

key

This switches

key.

zoom feature off.

150'

200'

8 DEGREE

20 DEGREE

8

17

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To

chanQe

the FEEt/METER menu
to

metric,

from feet to meters or

appears.

the

arrow to switch to feet.

up

vice-versa, press

the unit is first turned on. The menu

seconds or

the ON/CLEAR

press

key

DISPLAY CONTRAST
The unit's

suit different

help you

angles,

To

adjust

until the DARK/LIGHT menu

decrease

Press the

contrast. The

display

see the

or at various

the

it,

up

the contrast. The screen

reach the maximum

you

the limits. The menu will clear

to

can

you

press

contrast is

lighting

conditions. This will

screen from different

times of the

contrast, press

the down arrow

press

arrow

bar

graph

key

increase the

to

in the

will also show the effects of the

or minimum

the ON/CLEAR

adjustable

day.

the menu

appears.

key.

Dark/Light

automatically

to clear the screen.

key

ASP

(Advanced Signal

ASP is a

computer
eliminate noise. It

the

signals

which echoes are noise and

This allows true
on the screen with a
This feature is

typically
speeds

other controls. When the

turned on, ASP

press

the

will

the menu

up
clear

key

key repeatedly

arrow to turn it on or the down arrow to turn it off.

automatically

after a few seconds or

to clear the screen.

off,

press
menu

ON/CLEAR

the menu

the down arrow

Press

Displays

will clear

to clear

show in feet when

automatically

the screen.

to

key

To

menu box shows a

a tone sounds

level,

after a few

program

that is

lets

without

embedded

specifically

continually

from the

receiver,

target

especially

you operate

adjusting

echoes to

minimum of clutter.

is enabled.

until the ASP menu

you

key

to switch

key

after a few

graph

change.

alerting you

seconds or

Processing)

in the X-25's

designed

monitors

determines

rejects

useful since

the boat at
the

X-25 is first

To

appears.

can

them.

display

all

sensitivity

ASP

turn

Now

The

press

until

of

If

to

it

or

the

SENSITIVITY

The

sensitivity

oes. A low
fish

signals,

features,

wanted

signals. Typically,

solid bottom
The X-25

screen. It adds a little extra when it's

the

it the

gives

ations occur

sensitivity

so

detail,

it is the same

To

change

menu

the

appears.
menu shows

menu lets

sensitivity

and other detail.

level excludes

you

control

Nigh

but it can also clutter the screen

the best

with

signal

adjusts

capability

where it becomes

level.

Typically,

need to increase the

you

whether the unit is in the automatic

the

sensitivity

until the

key

If the unit is in

"AUTO SENS."

grayline.

the

sensitivity

to show fish and other detail. However,

this occurs when

level,

sensitivity

automatic,

the unit's
much of the bottom

sensitivity settings

with noise and other un-

sensitivity

level to

keep

in

necessary

first

menu

Otherwise,

to increase or

sensitivity.

press
the

ability

level shows a

a solid

automatic mode. This

the

wish

you

The

or manual mode.

the menu shows "MAN SENS." Now

the

press

sensitivity,

A vertical bar

shows the

scrolling

effects

reach the maximum

a tone sounds

level,
limits.

After

you've adjusted

ON/CLEAR
automatically

GRAYLINE
GRAYLINE lets

"paints" gray

shows the difference between a hard or soft bottom,

smaller

muddy,

up

arrow

to increase the

key

the down arrow to decrease it.

in the menu box

graph

sensitivity

onto the

of the

sensitivity change.

level. Echoes

screen wilt also show the

or minimum

alerting you

sensitivity

to the

the unit to the desired

clear the

to

key

clear.

you distinguish

on

targets

or rocks and brush on the bottom.

ones,

or

weedy

bottom returns a weaker

display.

that are

between

stronger

If

you

If

wait a few

you

strong

than a

signal

sensitivity

and weak echoes. It

preset

For
which shows a

to

pick up

information,

lets

you

good,

bottom

signal

decrease the

to see more

procedure

level,

press

seconds,

level. This

fish versus

large

example,

ech-

see

situ-

to

adjust

it

a

on

the

will

soft,

16

9

PDF compression, OCR, web-optimization with CVISION's PdfCompressor

narrow

or

no

gray

causes a wide

If

have two

you
without,
guish

the

target

fish from

line.

line.

gray

targets

with

structure,

A

hard bottom returns a

of

equal size,

is the

gray

or the

one with

stronger

fish from a smaller one.

larger

strong signal

and the other

gray

echo. This

helps

that

distin-

turn the alarm Sound off until the shallow alarm is

To turn the alarm

appears.

Then

off,

press

The alarm is now off.

press

the

up

the menu

arrow

key

until the shallow alarm

key

until the word "OFF"

triggered again.

menu

appears.

GRAYLINE ® is

strong

sensitivity setting.

To

and weak

change

the MENU

appears.

increase the

adjustable.

echoes,

the GRAYLINE

until the GRAYLINE menu

key

Now

press

the down arrow to

level,

decrease it. The bar

LINE

menu box shows the level now in

use. Echoes
also show

change.
minimum

scrolling

the effects of the GRAYLINE

If

reach the maximum or

you

a tone sounds

level,

to the limits.

The level chosen

turned on is

unit to find the GRAYLINE

your

usually adequate

the X-25 when it's first

by

Since it shows the difference between

changing

level,

the
graph

arrow

up

in the GRAY-

onto the screen will

the level

first

press

key

alerting you

for

most conditions.

setting

may require

to

that's best.

a different

Experiment

with

LAMP

The

X-25's

use.

To turn the

the menu

menu

appears.

turn the

Deep

The

shallow alarm. Use the "DEEP ALARM"

menu to

bottom

setting,

display

key repeatedly

lights

is

backlighted

until the

press

on or

the

backlights

Now

on or the down arrow to turn

Alarm

alarm

deep

adjust

signal goes deeper

adjusts

the

an alarm tone sounds.

373FT

for

night

off,

press

LAMP

arrow to

up

the same as the

alarm. When the

deep

than the

tt

them off. The menu will clear automati-

ID

FISH

The

fish. The
clutter,
stances, remaining targets

symbols

four

relative size
symbol

a

larger target,

The

distinguish

submerged

outwards from a

FEATURE

ID

Fish

feature identifies

micro-computer analyses

thermoclines,

and other undesirable

on the screen in

symbol

micro-computer

sizes:

tiny, small, medium,

between

targets.

when it thinks a

etc.

is

sophisticated,

between fish and other

air

floats,

bubbles,

of limbs are the hardest

group

target

targets

that meet certain conditions as

all echoes and eliminates surface

signals.

are fish. The Fish

of the actual fish echoes. There are

place

In

other

words,

is a small

ID

and

large.

a medium fish

fish,

In

feature

These show the

it

displays

but it can be fooled. It can't

suspended objects

etc. Individual tree limbs

10

such as

objects

in-

most

displays

a small fish

symbol

extending

for the Fish ID

on

turtles,

callyafter

a few seconds or

the ON/CLEAR

to clear the screen.

key

can

you

FEET/METER

The X-25

meters. When the unit is in the metric
mode,

and alarm

displays

miles.

When it's
above

and statute miles.
degrees

press

can show the

all

depth readings, ranges,

settings

in knots and

Temperature

in

settings

Fahrenheit.

15

:-C

the feet

are in

Temperature

. ______

depth

are in meters.

log

is in

degrees

mode,

feet,

in feet or

zooms,

Speed

is in nautical

Celsius.

all of the

miles

per

shows in

hour,

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ALARMS

FISH ALARM

feature to

screen

Fish ID feature is on and off to become more familiar with Fish ID.

distinguish

in

when,

from fish. You

there are no fish.

fact,

see Fish ID

may

Practice with the unit when the

symbols

on the

The Fish Alarm sounds a tone when a fish

symbol appears

fish

alarm,

"FISH ALARM" menu

screen. Now

turn the alarm on.

on the screen.

the

press

press

menu

appears

the

up

Repeat

to turn the fish alarm off.

ID feature is

turn the fish alarm

you

DEPTH ALARMS

The

depth

echoes will activate these alarms. The
shallow and
when the bottom

alarm

sounds a tone when the bottom

Both

alarms

it will be turned

off,

alarms are

alarm. The shallow alarm sounds an alarm

deep

goes

the

adjust

on.)

triggered only by

shallower than the alarm's

same,

To use the

until the

key

on the

arrow

the above

(Note:

although through

to

key

steps

If the Fish

on when

goes deeper

the bottom

depth

Shallow Alarm

To set the shallow
key repeatedly

menu

appears.

to increase the

decreases it. The number in the shallow
alarm's menu box shows the
shallow alarm

reaches the desired

alarm, press

until the "SHAL ALARM"

Press the down arrow

the

depth,

setting.

When the number

setting,

the menu

arrow

up

current

release the

key

key

signal.

alarms consist of a

setting.

than it's

different menus.

No other

tone

The

deep

setting.

373FT

act

When the X-25

ID feature is
To turn this feature

until the Fish ID
shown below. Now

This turns the feature off. To turn it

key.

back

on, repeat

the

The Fish ID feature can't be used when the

will

The rate echoes scroll across the screen is called the chart

adjustable

arrow

up

X-25 is in the manual mode. If

automatic feature

automatically

CHART SPEED

___________________

ml--

373FT

CHART
SPEED

—s

is first turned

automatically

off, press

feature's menu

press

the above

instead.

key

off,

be turned

by pressing

ac

.ec

on,

turned

the menu

the down arrow

steps,

the Fish ID

off,

the menu

appears.

—

when the X-25 is first turned on. To de-

crease

__

ec

Press the

speed again.
Speed

speed.

will

If

you

level,

the Fish

also.

on,

appears

key

as

373FT

FISH

ID

but

press

turn the

you

feature

also.

until the chart

key

Chart

it,

menu box

Echoes

also show the effects of the

reach the maximum or minimum

an

warning

the down arrow

press

arrow

up

The bar

speed

speed

scrolling

is set to maximum

to increase the

key

graph

shows

tone sounds.

a

graph

onto the screen

in the Chart

speed.

menu

key.

of

change.

It's

the

C—

-STOP

373FT

arrow
remove
screen. Now when the
shallower than
alarm tone
alarm

the screen

arrow

key.

Press the

ON/CLEAR

the shallow alarm menu from the

the alarm's

sounds. At the same time the

sounds,

key

14

a

message

as shown at left. Press the

to silence

the alarm. This

bottom

setting

box

to

key

depth goes

an

appears

on

up

will

To
from

CLEAR

a menu is

arrow

word "STOP"
portion

press

the

stop

the screen

key.

displayed.

key.

of the

the

up

chart,

The chart

first clear

by pressing

You can't

appears

screen. To start the

arrow

key again.

any

the ON/
the

stop

Now

press

will

freeze and the

at the

top right

menu
chart while

the

up

chart,

11

a-c

_____

________

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DISPLAY MODE
The X-25 has six different screen modes.

the MENU

Then

press

appears.

1

CHT
This is the default mode used

X-25 is

features:

1. Automatic On

2. Fish ID

3.

(Chart #1)

first

Digital Depth Display

until the "DISP MODE"

key

the

The

turned on. It has the

Feature

or down arrow

up

modes are as follows:

On

On

Same as Chart #1
water

optional

(Display Mode)
until

keys

when the

following

CHT 2

(Chart #2)

temperature display (Requires

LST-T

To

change modes, press

menu

appears.

the desired mode number

373FT

DIsP

MODE

1

•CHT

____________

___________________

plus digital

Speed/Temp Sensor.)

__

surface

CHT
This is the

shifts the chart
scrolling

following

S

1. Automatic Off

2. Fish ID Feature Off

3.

DIG 1

(Digital #1)

This is the first
shows the

the screen in

shallow and
displayed

chart shows on this screen.

digital only

digital depth display

very large

alarm

deep

beneath the

screen. It

numbers. The

settings

digital depth.

4

(Chart #4)

High Speed

echoes at a

features:

All

Digital Displays

at the

are

top

No

of

mode. It

Scroll

into

speed

high gear,

rate. It has the

high

Off

DEPTH FT

[60.8]

SHAL ALM

I

L

I

OFT

DEEP ALM

OFT

CHT 3
Same as Chart #1

display.(Requires optional

Temp Sensor.)

(Chart #3)

plus digital speed

LST-T

C

ZM-—20

34•4FT

47MPH

Speed/

C

12 13

DEPTH FT

[38.3]

TEMP °F

I

L

[SPEED

I
f

L

76.2

MPH

33.2

LOGMI

2.9

2

DIG

(Digital #2)

The

digital depth display

of this

screen

digital temperature, speed,
beneath the

LST-T

starts
turned on. The

the X-25 is turned

Speed/Temp Sensor.)

counting

in

very large digits.

depth. (Requires optional

when the X-25 is first

log

shows at the

is reset to zero when

off.

and

The

log

top

The

shows

log

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