Guoxian NAKI8800 User manual

Thank you for purchasing a NAKI Portable Fish Finder.
The NAKI8800 portable fish finder is a high-quality sonar
designed for both professional and novice fishing fans.
Applicable area includes lake, river, sea, shoreline, bridge, local
dock, canoe, kayak, and jon boat. However, because of the
nature of sonar, this product is not intended for use in swimming
pools or small enclosed bodies of water.
To use, simply turn the power on and toss the unique floating
transducer from the shoreline, bridge or boat, then, instant depth,
fish, and bottom profiles will be in the palm of your hand.
We may find it necessary to change or end our policies, regulations, and special
offers at any time. We reserve the right to do so without notice. All features and
specifications subject to change without notice.

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Table of Contents
Specifications……………………………….......................................…...…………………1
Operational Modes & Understanding of the Display…………………………………….3
The Sensor Can Be Used in Two Distinct Ways…………………………………………..3
Default Settings & Default Display…………………………………………………..…..4
Understanding the Display………………………………………………………………..4
Installations……………………………………………….……………………..…………..5
Installing the Batteries………………………..………………………………………...…5
Connecting the Sonar Sensor Cable……….………………………………………………5
Adjusting the Sonar Sensor Float………………..………………………………………...6
Using the Sonar Sensor……………………………………………………………………6
Ice Fishing…………………………………………………………………………………7
Boat Fishing…………………………………………..……………………..…………….8
Operation……………………..…………………………………..………………..…….10
Panel Basics…………………………………………..……………………..…………10
Fish Identification………………………………………………………………………..11
Fish Alarm…………………………………………..………………………...………….12
Shallow Alarm……………..……………………………………………………...……..13
Sensitivity………………………….……………………………………………...……..13

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Back Light…………………………………..……………………………………..……..14
Display Contrast………………………………………………………………………….15
Power Save……………………………………………………………………………….15
Depth Units……………………….......………………………………………………….16
Temperature Units.................................………………………………………………….16
Water Environment…………………….……………………………..……...…..………17
Default Setting………………………………………………………..……...…..………17
Simulation Mode………………………………………………………………....………18
Cautions……….…………………………………...………………………………………19
Care of Your Fish Finder……………………….…………………………………………19
Trouble Shooting……………………………..……………………………………………20
Warranty Card…………………………………………………………………………….23
Guarantee Conditions…………………………..………………………………………....24

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Specifications
Unit Dimensions:
Display:
Resolution:
Power Requirement:
Battery Life:
Depth Units:
Depth Range:
Temperature Units:
Operational Temperature:
Sonar Sensor Frequency:
Sonar Beam Angle:
Sensor Cable Length:
Fish Identification:
Alarms:
Back Light:
Sensitivity:
0.9”H×2.2”W×4.7”D. Sealed and Waterproof.
Adjustable High-contrast Dot Matrix LCD
with Diagonal Viewing Area of 2.22” (5.64cm).
130 pixels (vert.) x 64 pixels (horiz.); 8,320 total pixels.
4בAAA’Alkaline Batteries.
20 Hours Continuous Use with Back Light On.
Meters/Feet.
From 3 to148 Feet (.9 to 45 Meters).
℃/℉.
From -10℃to 50℃(14℉to122℉).
190 KHz.
45°.
10 M (35 Feet).
On/Off.
Fish/Shallow.
On/Off/Auto..
High/Low.

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Water Environment:
Back-up memory:
Water Bottom Graph:
Fresh/Salt.
Built-in memory stores sonar settings
when the unit is turned off.
True Changing Graph.

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Operational Modes & Understanding of the Display
The sensor can be used in two distinct ways:
Sonar Graph: This way is to obtain true bottom profiles. The sensor can be used to create a
sonar graph of the true bottom. Toss the sonar sensor and float assembly into the water and
then move it at a slow and steady rate. The digital display will provide precise information
for true bottom contour, depth and structure below the sensor. Fish will be displayed when
detected.
Stationary Monitor: The sensor can be used in a stationary location to monitor the area
below. It will give you a live update as fish approach. In stationary use, bottom graph on the
display represents the approx amount of bottom structures. The smoother is the graph, the
less rocks, stumps and ledges are there in the bottom. The rougher is the graph, the more
rocks, stumps and ledges are there in the bottom. The reason is that in stationary use, more
bottom structures will result in more variations of the sonar intensity. These variations will
be showed on the graph.

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Default Settings Default Display
Fish Identification: On
FishAlarm:On
Shallow Alarm: 6 Ft
Sensitivity: High
Back Light: Automatic
Display Contrast: 75%
Power Save: Off
DepthUnits:Feet
Temperature Units: ℃
Water Environment: Fresh
Understanding the Display
The detection graph is shown from the right corner from top to down. It would scroll
forwards to left continuously. The most present and newest signals are displayed on the
rightmost screen. And the leftmost are those of 16 seconds ago.

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Installations
Installing the Batteries
1. Turn the screw anti-clockwise with a screw driver. Then slide the
Battery Door towards the bottom of the unit and remove it from the main
housing.
2. Install 4 “AAA” batteries. Be certain that the batteries are aligned as
per the diagram within the battery compartment.
3. Slide the Battery Door towards the top of the unit until it is completely
closed. Then turn the screw clockwise with a screw driver until snug
before continuing. Be certain not to over-tighten it.
Connecting the Sonar Sensor Cable
Just insert the Sensor Plug easily into the socket on the right side of the
unit.

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Adjusting the Sonar Sensor Float
It is very important to adjust the sonar sensor float so that it is 6 inches
or further away from the sonar sensor. In calm water, set the sonar sensor
at a depth that will provide maximum sonar coverage. In rough water,
lower the sonar sensor into the water further to gain stabilized readings.
1. Pull out the rubber stopper.
2. Adjust the float so that it is 6 to 10 inches from the sensor.
3. Replace the rubber stopper. To prevent accidental loss of the Stopper,
always press the rubber stopper firmly into the float before tossing the
sonar sensor into the water.
Using the Sonar Sensor
1. Toss the sonar sensor and float assembly into the water. To toss, place the sonar sensor
and float in your hand, and pitch it underhand. Do not throw the sonar sensor by the cable as
this will cause unrepairable damage. Before tossing, be certain that the cable is free from
tangles and is not wrapped around anything.
2. To guide the sonar sensor to a desirable position, use a pole, or add floats on the cable to
allow the cable to float on top of the water.
3. To retrieve the sonar sensor and float, pull in the cable carefully and wind up the excess

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cable neatly.
Note: To remove the Sonar Sensor Float, remove the rubber stopper first, then slide the
cable through the center of the float toward the plug and gently work the plug through the
center of the float in a rocking motion. To add, reverse the steps above.
Note: Do not allow the cable to sink to the bottom as it may become
entangled in debris.
Ice Fishing
To find out a right point for ice fishing is a difficult matter. But using our fish finder will
make it very easy. To achieve the best performance for ice fishing, it is highly recommended
that you cut a hole through the ice and place the sonar sensor directly in the water. However,
you can avoid hassle of cutting hole after hole by checking the area for depth or fish with
our fish finder in advance, please follow steps 1- 4 precisely.
1. Clear away snow to expose the ice surface, making sure the surface is
smooth.
2. Place a small amount of liquid water on the ice and set the sensor on the
water allowing the unit to be frozen to the ice.
3. If there are any air pockets between the sonar sensor and ice, or

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the water below the ice, the unit will not work properly and will require you to try another
spot, or cut a hole in the ice to use.
4. To remove the sonar sensor from the frozen ice, gently tap the sonar sensor at the base
with your hand. If it does not come loose, spray a small amount of water around the sensor
surface and ice and repeat step 4 until the sonar sensor is easily removed.
Warning: Never use a blunt object to strike the sonar sensor as this may cause damage to
the sensitive internal electronic components.
Note: Due to various environmental conditions, this process may not work in all situations.
Boat Fishing
There are three methods that the fish finder can be used from a boat.
1. Toss the sensor and float into the water as per the previous instructions.
2. “Shoot Thru” the hull according to one of the instructions as follows.
a) Place the sonar sensor in .5 inches of water against the hull bottom.
b) Coat the face of the sonar sensor with petroleum jelly, then press it
against the hull bottom with a twisting motion.

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c) Place the sonar sensor in a plastic bag full of water and then place it
against the hull bottom.
If depth readings appear as “---” while using one of these methods, toss the sonar sensor
directly into the water to verify that the fish finder is operating properly. If it operates
properly when placed directly in the water, reposition the sensor in a new location in the
hull, and repeat methods a, b, or c. These methods DO NOT work on all hulls and you may
have to place the sensor directly in the water for proper operation.
Note: The fish finder’s advanced sonar could shoot thru the bottom of a boat or canoe hull.
However, the hull must be made out of solid fiberglass, or a maximum of 1/8” aluminum,
and be in direct contact with the water, with no air pockets. The sonar can not shoot thru
wood, plastic, or any composite material.
3. Mount the sonar sensor to the boat hull.
Find a steel slice which is 1 mm thick at least. Drill holes on it and bend it to
a proper angle. Then use it to mount the sensor to a boat with screws. Please
see the figure.
Note: The slice should be bent properly so that the sonar sensor is
perpendicular to the water after mounted to the boat.

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Operation
Panel Basics
(1) Sonar Sensor Plug
(2) Dot Matrix Display
(3) Photoelectric Sensor
(4)PowerandRefreshingKey
Press it for 3 seconds to turn the unit on or off.
Pressitfor6secondstoturnthesimulationmodeonwhilethescreenisoff.
Pressittorefreshthescreenifinconsistentreadingsareevident.
Italsocouldbepressedtoquitmenus.
(5) Menu Key
Press this key to activate and move forward through the menus.
(6)SetupKey
Press this key to adjust virtually every feature and function of a
certain menu.
(7) Enter Key
Press this key to activate a feature.

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Fish Identification
Press MENU key until the Fish Iden. menu appears.
To turn it on, press SETUP key to select On, then press Enter key.
To turn it off, press SETUP key to select Off, then press Enter key.
To exit and move forward to the next menu, press MENU key.
When this feature is off, the inside microcomputer will not analyse or filter the
signals. Therefore, all actual signals will be directly displayed on the screen as
arch icons, not fish icons. In other words, these arches represent unprocessed signals.
When this feature is on, the inside microcomputer will automatically analyse actual echo
signals, discard the undesired and judge the remnants as fishes, then, display them as fish
icons on the screen. Big fish icons or small fish icons will be displayed instead of the actual
echo signals and arch icons. The fish depth indicator will also be
shown above the fish icons when this feature is on. Here, total
water depth is always divided by 10.
(Example, if the total water depth is 120.5 feet and the fish depth
indicator shows 4, this means the fish depth is four tenth of the
total water depth. In other words, the fish is 120.5×4/10=48.2
feet from the surface.)

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Although this feature is very helpful for a sonar novice to identify fishy echo signals, false
identification may occur. The fish finder is sophisticated, but it can not distinguish between
signals of fishes and those of some other suspended objects. Moreover, in this feature, echo
signals are just interpreted in a specific way by the microcomputer to help the users to
recognize fishy signals. So, sometimes, there are fishes present but no fish icon is displayed,
or, fish icons are displayed with no fish actually.
To see the maximum details in the water, just turn off Fish Identification feature and try to
interpret echo signals.
In water shallower than 2 Meters (6.7 Feet), it is also suggested that you turn off Fish
Identification feature to interpret fish arches.
Fish Alarm Press MENU key until the FishAlarm menu appears.
To turn it on, press SETUP key to select On, then press Enter key.
To turn it off, press SETUP key to select Off, then press Enter key.
To exit and move forward to the next menu, press MENU key.
The default Fish Alarm setting is on. But it will not work unless the Fish
Identification feature is on. When the fish finder judges that there is a fish
and displays a fish icon, it will sound a tone.

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Shallow Alarm
Press MENU key until the ShallowAlarm menu appears.
To increase the shallow alarm depth, press SETUP key.
To decrease the shallow alarm depth, press ENTER key.
To turn off the alarm, press ENTER key until the figure shows 0.
To exit and move forward to the next menu, press MENU key.
When the bottom depth goes shallower than the alarm setting, it will sound a
tone and a message will be displayed. To silence the alarm, press any key,
otherwise, it will keep sounding.
Note: When depth units is changed between M and Ft, remember to rectify shallow alarm settings.
Sensitivity
Press MENU key until the Sens. menu appears.
To choose High sens., press SETUPkey to select High, then press ENTER key.
To choose Low sens., press SETUP key to select Low, then press ENTER key.
To exit and move forward to the next menu, press MENU key.
It is suggested that you choose High sensitivity in stained or dirty water.
However, this will increase irritating false readings especially when the Fish

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Identification feature is turned on.
It is also suggested that you choose High sensitivity while targeting deep water fish.
It is suggested that you choose Low Sensitivity in water shallower than 5 Meters (16.5 Ft).
Back Light Press MENU key until the Back Light menu appears.
To turn it on, press SETUP key to select On, then press ENTER key.
To turn it off, press SETUP key to select Off, then press ENTER key.
To choose Automatic back light, press setup key to select Auto., then press
ENTER key.
To exit and move forward to the next menu, press MENU key.
With back light feature On, the screen will be illuminated all the time.
With back light feature Off, the backlight will illuminate for 3 secs. when a
key is pressed.
With automatic Back Light feature on, the screen will be automatically illuminated in feeble
intensity when the environment is dim. Then, if the fish finder detects a fish or the user
presses any key, the back light will be activated to high intensity for 3 seconds. When the
environment is bright, it will not be illuminated.

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Display Contrast
Press MENU key until the Back Light menu appears.
To increase the contrast, press SETUP key.
To decrease the contrast, press ENTER key.
To exit and move forward to the next menu, press MENU key.
The display contrast is adjustable to adapt to different lighting conditions.
With this function, you could see the screen from different angles or at
various time of a day. The default setting is 75%.
Power SavePress MENU key until the Power Save menu appears.
To turn it on, press SETUP key to select On, then press ENTER key.
To turn it off, press SETUP key to select Off, then press ENTER key.
To exit and move forward to the next menu, press MENU key.
Power Save Feature activated will update the display every 10 secs.,
but will not give instant readings. This feature is only to preserve Battery life.
When Power Save feature is on, there will be an icon of on the display.

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Depth Units
Press MENU key until the Depth Units menu appears.
Use the SETUP key to select Meters or Feet, then press ENTER key.
To exit and move forward to the next menu, press MENU key.
Temperature Units
Press MENU key until the Temp. Units menu appears.
Use the SETUP key to select ℃ or ℉, then press ENTER key.
To exit and move forward to the next menu, press MENU key.