Thank you for choosing Humminbird®, the #1 name in fishfinders.
Humminbird® has built its reputation by designing and manufacturing
top-quality, thoroughly reliable marine equipment. Your Humminbird® is
designed for trouble-free use in even the harshest marine environment. In the
unlikely event that your Humminbird® does require repairs, we offer an
exclusive Service Policy - free of charge during the first year after purchase,
and available at a reasonable rate after the one-year period. For complete
details, see the separate warranty card included with your unit. We encourage
you to read this operations manual carefully in order to get the full benefit from
all the features and applications of your Humminbird® product.
Contact our Customer Resource Center at 1-800-633-1468 or visit our Web
site at humminbird.com.
WARNING! This device should not be used as a navigational aid to prevent collision,
grounding, boat damage, or personal injury. When the boat is moving, water depth
may change too quickly to allow time for you to react. Always operate the boat at very
slow speeds if you suspect shallow water or submerged objects.
WARNING! The electronic chart in your Humminbird® unit is an aid to navigation
designed to facilitate the use of authorized government charts, not to replace them.
Only official government charts and notices to mariners contain all of the current
information needed for the safety of navigation, and the captain is responsible fortheir
prudent use.
WARNING! Disassembly and repair of this electronic unit should only be performed
by authorized service personnel. Any modification of the serial number or attempt to
repair the original equipment or accessories by unauthorized individuals will void the
warranty.
WARNING! This product contains chemicalsknown to the Stateof California to cause
cancer and/or reproductive harm.
WARNING! Do not travel at high speed with the unit cover installed.Remove the unit
cover before traveling at speeds above 20 mph.
WARNING! Humminbird® is not responsible for the loss of data files (waypoints,
routes, tracks,groups,recordings, etc.)that mayoccur due to director indirect damage
to the unit’s hardware or software. It is important to back up your control head’s data
files periodically. Data files should also be saved to your PC before restoring the unit’s
defaults or updating the software. See the following sections of your Humminbird®
manual: Snapshot and Recording View and SD Card Slot. Also, contact our Customer
Resource Center with any questions.
ROHS STATEMENT: Product designed and intended as a fixed installation or part of
a system in a vessel may be considered beyond the scope of Directive 2002/95/EC of
the European Parliament and of the Council of 27 January 2003 on the restriction of
the use of certain hazardous substances in electrical and electronic equipment.
ATTENTION INTERNATIONAL CUSTOMERS: Products sold in the U.S. are not
intended for use in the international market. Humminbird® international units
provide international features and are designed to meet country and regional
regulations. Languages, maps, time zones, units of measurement, and warranty
are examples of features that are customized for Humminbird® international units
purchased through our authorized international distributors.
Toobtain a list of authorized international distributors, please visit our Web site at
humminbird.com or contact our Customer Resource Center at (334) 687-6613.
NOTE: Some features discussed in thismanual requirea separate purchase, and some
features are only available on international models. Every effort has been made to
clearly identify those features. Please read the manual carefully in order to understand
the full capabilities of your model.
NOTE: The illustrations in this manual may not look exactly like the display on your
Humminbird® model, but your model will work in the same way.
NOTE: To purchase accessories for your control head, visit our Web site at
humminbird.com or contact our Customer Resource Center at 1-800-633-1468.
NOTE: The procedures and features described in this manual are subject to change
without notice. This manual was written in English and may have been translated to
another language. Humminbird® is not responsible for incorrect translations or
discrepancies between documents.
300 Series™, Down Imaging®, DualBeam PLUS™, Fish ID+™, HumminbirdPC™, Humminbird®,
LakeMaster®, Real Time Sonar™, RTS™, RTS Window™, SI™, Side Imaging®, Structure ID™,
SwitchFire®, Total Screen Update™, UniMap™, WhiteLine™, and X-Press™ Menu are
trademarked by or registered trademarks of Johnson Outdoors Marine Electronics, Inc.
Adobe, Acrobat, Adobe PDF, and Reader are either registered trademarks or trademarks of
Adobe Systems Incorporated in the United States and/or other countries.
Baekmuk Batang, Baekmuk Dotum, Baekmuk Gulim, and Baekmuk Headline are registered
trademarks owned by Kim Jeong-Hwan.
Navionics® Gold, HotMaps™, and HotMaps™ Premium are registered trademarks of Navionics®.
Format Nav Directories ........................................................................................ 158
Select Readouts
Depth Offset
Temp. Offset
Speed Calibration
Local Time Zone
Daylight Saving Time
Position Format
Time Format
Date Format
Digits Format
NMEA 0183 Output
Finding the Cause of Noise.................................................................................. 170
Specifications171
Glossary173
Contact Humminbird®181
NOTE: Entries in this Table of Contents which list (International only) are only
available on products sold outside of the U.S. by our authorized international
distributors. To obtain a list of authorized international distributors, please visit
our Website at humminbird.comor contact our Customer Resource Center at
(334) 687-6613.
NOTE: Entries in this Table of Contents which list (with Temp/Speed only)
require the purchase of separate accessories. Visit our Web site at
humminbird.com to order these accessories online or contact our Customer
Resource Center at 1-800-633-1468.
NOTE: Some features discussed in this manual require a separate purchase,
and some features are only available on international models. Every effort has
been made to clearly identify those features. Please read the manual carefully
in order to understand the full capabilities of your model.
ix
Power On
Follow the instructions below to power on your Humminbird® control head.
398ci SI Combo Title Screen
1. Press thePOWER/LIGHT key.
2. When the Title screen is displayed, press the MENU key to access the
Start-Up Options Menu.
3. If a functioning transducer is connected, Normal operation will be
selected automatically, and your Fishfinder can be used on the water.
See Start-Up Options Menu for more information.
• If a transducer is not connected and you wait too long to select a
Start-Up Option, the system will default to whichever menu is
already highlighted.
• You can also select Simulator to learn how to use your control
head and save settings in advance for later use.
4. Quick Setup: If this is the first time the unit has been powered on (after
installation or after restoring defaults), the Quick Setup dialog box will
display on the screen. Use the 4-WAY Cursor Control key to set the
Language, Water Type, and Max Depth. Press the EXIT key to close the
dialog box.
1
Power On
NOTE: The Quick Setup settings can be changed at any time. See each menu
option in The Menu System for details.
How Sonar Works
Sonar technology is based on sound waves. The 300 Series™ Fishfinder uses
sonar to locate and define structure, bottom contour and composition, as well
as depth directly below the transducer.
Your 300 Series™ Fishfinder sends a sound wave signal and determines
distance by measuring the time between the transmission of the sound wave
and when the sound wave is reflected off of an object; it then uses the reflected
signal to interpret location, size, and composition of an object.
Sonar is very fast. A sound wave can travel from the surface to a depth of
240 ft (70 m) and back again in less than 1/4 of a second. It is unlikely that your
boat can “outrun“ this sonar signal.
SONAR is an acronym for SOund and
NAvigation Ranging. Sonar uses precision
sound pulses or “pings“ which are emitted
into the water in a teardrop-shaped beam.
The sound pulses “echo“ back from objects
in the water such as the bottom, fish, and
other submerged objects. The returned
echoes are displayed on the LCD screen.
Each time a new echo is received, the old
echoes are moved across the LCD, creating
a scrolling effect.
How Sonar Works
2
When all the echoes are viewed side by side, an
easy to interpret “graph“ of the bottom, fish, and
structure appears.
The sound pulses are transmitted at various
frequencies depending on the application. Very
high frequencies (455 kHz) are used for greatest
definition but the operating depth is limited. High
frequencies (200 kHz) are commonly used on
consumer sonar and provide a good balance
between depth performance and resolution. Low
frequencies (83 kHz) are typically used to achieve
greater depth capability.
The power output is the amount of energy
generated by the sonar transmitter. It is commonly
measured using two methods:
• Root Mean Square (RMS) measures power
output over the entire transmit cycle.
• Peak to Peak measures power output at the
highest points.
The benefits of increased power output are the
ability to detect smaller targets at greater
distances, ability to overcome noise, better high
speed performance and enhanced depth capability.
3
How Sonar Works
Side Imaging® Sonar
6
0°
8
3kHz
2
0°
200kHz
86°
455kHz
86°
455kHz
180 Degree Total Coverage
Your Fishfinder uses Side Imaging®
sonar to provide a wide yet precise
survey of a large area of water,
includingdetailedbottom
topography and fish-attracting
structure orientation. The Side
Imaging® transducer returns are
processed into an image similar to
an aerial photograph.
Typically, the Side Imaging® sonar
can search an area that is 240 feet
wide to each side, 480 feet total
coverage, with a depth limitation
of 150 feet. See What’s on
the Side Imaging® Display and
Understanding the Side Imaging®
Display for more information.
The Side Imaging® transducer also
provides Down Imaging® displays
on the screen. See What’s on theDown Imaging® Display for more
information.
How Sonar Works
Depth capability is affected by such
factors as boat speed, wave action,
bottom hardness, water conditions,
and transducer installation.
4
DualBeam PLUS™ Sonar
Your Fishfinder uses a 200/83 kHz DualBeam
PLUS™ sonar system with a wide (60°) area of
coverage. DualBeam PLUS™ sonar has a
narrowly focused 20° center beam, surrounded
by a second beam of 60°, expanding your
coverage to an area equal to your depth.
In 20 feet of water, the wider beam covers an
area 20 feet wide.
DualBeam PLUS™ sonar returns can be blended
together, viewed separately, or compared sideby-side. DualBeam PLUS™ is ideal for a wide
range of conditions - from shallow to very deep
water in both fresh and salt water. Depth
capability is affected by such factors as boat
speed, wave action, bottom hardness, water
conditions, and transducer installation.
5
How Sonar Works
Ice transducer
Dual Beam Ice Transducer
(optional-purchase XI 9 20 Ice Transducer only)
The XI 9 20 Ice Transducer provides
selectable dual-frequency sonar with a
wide area of coverage. Selectable dualfrequency gives you the option of two
beams, and both beams will cover the
bottom and provide high definition. The 20
degree center beam provides the highest
definition, while the 60 degree beam
provides wider coverage. Depth capability
is affected by such factors as bottom
hardness and water conditions. Whether
fishing in shallow to very deep water,
selectable dual-frequency is ideal for a
variety of conditions.
NOTE: Visit our Web site at humminbird.com
to determine which accessory transducers are
compatible with your Humminbird® Fishfinder,
or contact our Customer Resource Center at
1-800-633-1468.
How Sonar Works
6
How GPS Works
Your 300 Series™ Fishfinder also supports GPS (Global Positioning System) and
chartplotting. It uses GPS and sonar to determine your position, display it on a
grid, and provide detailed underwater information.
GPS uses a constellation of satellites that
continually send radio signals to the earth. The
GPS receiver on your boat receives signals from
satellites that are visible to it. Based on time
differences between each received signal, the GPS
receiver determines its distance to each satellite.
With distances known, the GPS receiver
mathematically triangulates its own position. With
5 updates per second, the GPS receiver then
calculates its velocity and bearing.
GPS was originally intended for military use; however, civilians may also take
advantage of its highly accurate position capabilities, typically within +/- 4.5
meters, depending on conditions. This means that 95% of the time, the GPS
receiver will read a location within +/- 4.5 meters of your actual position. Your
GPS Receiver also uses information from WAAS (the Wide Area Augmentation
System), EGNOS (the European Geostationary Navigation Overlay Service), and
MSAS (the MTSAT Satellite Augmentation System) satellites if they are
available in your area.
The following GPS functionality is currently supported by the 300 Series™
Fishfinder when it is connected to the included GPS receiver:
• View current position
• View current track (breadcrumb trail)
• View precision speed and heading from your GPS receiver
• Save tracks, waypoints, and routes
• Travel a route and navigate from one waypoint to the next
See SD Card Slot, Chart View, and Introduction to Navigation for more
information.
7
How GPS Works
What’s on the 300 Series™ Control Head
Your 300 Series™ Fishfinder interface is easy to use. A combination of keys and
special features allows you to control what you see on the display. Refer to the
following illustration, and see Key Functions for more information.
2
1
ScreenMARK key
1
ZOOM (–) key
2
ZOOM (+) key
3
VIEW key
4
5
4-WAY Cursor Control key
(LEFT, RIGHT, UP, or DOWN Cursor keys)
6
MENU key
3
EXIT key
GOTO key
POWER/LIGHT key
CHECK/INFO key
SD Card slot cover
4
5
6
7
8
9
10
11
12
7
8
9
10
11
12
The Control Head
8
Key Functions
Your Fishfinder user interface consists of a set of easy-to-use keys that work
with various on-screen views and menus to give you flexibility and control over
your fishing experience.
POWER/LIGHT Key
The POWER/LIGHT key is used to power the Fishfinder on and off.
You can also use the POWER/LIGHT key to adjust the backlight
and contrast of the display.
Power On: Press the POWER/LIGHT key to power on the unit. When the Title
screen is displayed, press the MENU key to access the Start-Up Options Menu.
Power Off: Press and hold the POWER/LIGHT key for 3 seconds. A message will
appear to indicate how many seconds there are until shutdown occurs. To
ensure that shutdown occurs properly and any menu settings will be saved,
your Fishfinder should always be turned off using the POWER/LIGHT key.
AdjusttheBacklightortheDisplay
Background Color: Press the POWER/LIGHT key
to access the Light and Background submenu.
Use the 4-WAY Cursor Control key to select
Light or Background, and then use the LEFT or
RIGHT Cursor key to change the settings. Press
the EXIT key to exit the Light and Background
submenu.
NOTE: Your 300 Series™ Fishfinder will start up with the backlight on and will
automatically turn it off to conserve power.
Turn Sonar On or Off: From the Light and Background submenu, use the
4-WAY Cursor Control key to select Sonar. Use the LEFT or RIGHT Cursor key to
change the setting. See Setup Menu Tab: Sonar for more information.
9
Key Functions
VIEW Key
The VIEW key is used to cycle through all available views. Press the
VIEW key to advance to the next view. Repeatedly pressing VIEW
cycles through all views available. Views can be hidden to optimize the system to
your fishing requirements (see Views or Views Menu Tab).
NOTE: Press the EXIT key to cycle through the views in reverse order.
CHECK/INFO Key
Press the CHECK/INFO key while in Bird's Eye, Chart, or Combo
View to display information about objects that are near an active
cursor. If the cursor is not active, the Chart Info submenu will be
displayed. See Views: Viewing Cartography for more information.
MENU Key
The MENU key is used to access the menu system. See The
Menu System for more information.
• Start-Up Options Menu: Press the MENU key during the power up
sequence to view the Start-Up Options menu.
• X-Press™ Menu: Press the MENU key once in any view to access the
X-Press™ Menu, which provides frequently-used menu settings that
correspond with the current view or navigation mode.
• Main Menu: Press the MENU key twice in any view to access the Main
Menu, which is organized under tabbed headings to help you find a
specific menu item quickly.
Key Functions
10
4-WAY Cursor Control Key
(LEFT, RIGHT, UP, or DOWN Cursor keys)
The 4-WAY Cursor Control key has multiple functions, which
depend on the view, menu, or situation.
• Menu Selection: Press the DOWN or UP Cursor keys to highlight a
menu option, then press the RIGHT or LEFT Cursor keys to change a
menu setting. The changes will be activated and saved immediately.
• Freeze Frame: In Sonar View, Side Imaging® View, and Down Imaging®
View, press any arrow on the 4-WAY Cursor Control key to freeze the
display and move the active cursor to a location on the screen. A cursor
dialog box will display to show the depth of the location you choose.
• Active Cursor: Press any arrow on the 4-WAY Cursor Control key, and
the active cursor will appear on the screen.
• Chart View: The 4-WAY Cursor Control key also pans the charts and
highlights decluttered waypoint icons.
NOTE: In Freeze Frame or Active Cursor mode, you can also make the
cursor move diagonally by pressing in between two of the arrows on the
4-WAY Cursor Control key.
• Bird’s Eye View: The 4-WAY Cursor Control key controls the motion of
the eye point.
• Snapshot and Recording View: Press the UP or DOWN Cursor keys to
highlight a recording icon, and then press the RIGHT Cursor key to start
recording playback. Press the RIGHT or LEFT Cursor keys to control the
speed of playback.
• Circular Flasher View (Ice Fishing Mode: On): Press the UP or DOWN
Cursor keys to move the Depth Cursor. Press the RIGHT or LEFT Cursor
keys to adjust the Zoom Range (see Views: Circular Flasher View).
11
Key Functions
MARK Key
Press the MARK key while in any view to mark the position of a
waypoint. The MARK key function works if you have the GPS
receiver connected.
• Active Cursor: The waypoint will be marked at the cursor location.
• Without Active Cursor: The waypoint will be marked at the boat
location.
• If Screen Snapshot is active, a waypoint will be created, and a screen
snapshot will also be saved to the optional-purchase SD card (see
Views: Snapshot and Recording View). Navigation is not affected by
the Screen Snapshot feature.
NOTE: If Screen Snapshot is enabled but there is not a GPS receiver connected,
pressing the MARK key will capture the screen image and display an error saying
that a GPS position fix is required to create a waypoint.
NOTE: You must have an optional-purchase SD card installed for the screen
snapshot feature to work.
GOTO Key
The GOTO key has multiple functions, which depend on the
situation.
• Active Cursor: Press the GOTO key while in any view to create a
waypoint and start navigation towards that waypoint.
• Without Active Cursor: Press the GOTO key to display the saved
waypoints list, and then highlight a waypoint. Press the RIGHT Cursor
key to begin navigation.
ZOOM (+/–) Key
The Zoom (+/–) key has multiple functions, depending on
the situation:
• In any of the Chart Views or the Sonar Zoom View, press the
+/– Zoom key to change the scale of the view to appear closer or farther
away. See Views and Introduction to Navigation for more information.
Key Functions
12
• In the Circular Flasher View (Ice Fishing Mode: On), press the +Zoom
key to display a 2x magnified view of the selected area on the Flasher
dial. See Views: Circular Flasher View for more information.
• Side Imaging® View and Down Imaging® View: Use the 4-WAY Cursor
Control key to move the active cursor to a position on the screen. Press
the + ZOOM key to magnify your selection. Press the – Zoom key to
decrease the scale.
NOTE: The cursor must be activefor the zoom featureto workin the Side Imaging®
or Down Imaging® View.
EXIT Key
The EXIT key has multiple functions, which depend on the
situation:
• If an alarm is sounding, press the EXIT key to cancel the alarm.
• If a menu tab is selected, press the EXIT key to exit the menu mode and
return to the view.
• If a menu is active, press the EXIT key to return to the previous level in
the menu system.
• From any view, press the EXIT key to cycle through the available views
in reverse order.
• If Freeze Frame is active, press the EXIT key to return to a scrolling
display.
• If the Cursor is active, press the EXIT key to remove the cursor from the
display.
• If Side Imaging® or Down Imaging® Zoom is active, press the EXIT key to
remove the magnification box from the display and remove the cursor.
13
Key Functions
SD Card Slot
The SD card slot on your control head can be
used with SD memory cards (optional-purchase
required) to add detailed charts to your
Fishfinder, import Humminbird® navigation
data, or export navigation data from your
Inserting an SD Card
into the Card Slot
NOTE: The SD Memory Cards require a separate purchase. For more
information, visit our Web site at humminbird.com or contact our Customer
Resource Center at 1-800-633-1468.
To insert an SD memory card:
1. Remove the SD memory card slot cover.
2. Position the SD memory card so that the label faces the right side of
the unit, and insert the card into the slot. Press down on the card until
it clicks into place.
3. Close the slot cover and turn the knob just 1/4 of a turn to close. Do
NOT overtighten, as this will not improve water resistance and may
damage the cover.
4. To Remove: Press the SD memory card into the slot and then release.
The card will eject, and you can then pull the card from the slot.
Fishfinder.
NOTE: Do not leave the SD slot cover open. The slot cover should always be closed
to prevent water damage to the unit.
SD Card Slot
14
Add Maps to your Fishfinder
Your Fishfinder includes a built-in UniMap™ with a more detailed map of North
America (Domestic models) or a detailed map of Europe and Southeast Asia,
including Australia and New Zealand (International models).
You can also purchase SD memory cards with additional chart information for a
particular location.
NOTE: The SD memory cards require a separate purchase. Your Fishfinder
supports LakeMaster®, Navionics® Gold, HotMaps™, and HotMaps™
Premium on SD card media. Your Fishfinder does NOT support Navionics®
Classic Charts or Platinum™ Cartography.
• Auto Select: When you install the SD card in your control head, your
Fishfinder will retrieve the chart and display it automatically.
• Chart Select: You can also choose which chart to display with the Chart
Select menu option in the Chart Menu Tab (see Chart Menu Tab: ChartSelect).
• Chart Layers: You can customize your Navigation Views by selecting
which chart layers to display or hide (see Chart Menu Tab: Chart DetailLevel).
• Map Borders: Use the 4-WAY Cursor Control key to move the active
cursor within a map border, and press the +ZOOM key to view the
different map (see Chart Menu Tab: Map Borders).
• Menu Options: The Chart Menu Tab will change to display menu
options that correspond with the active chart (see Chart Menu Tab).
15
SD Card Slot
Import Navigation Data
Review the following information before importing navigation data (waypoints,
routes, tracks, or groups) into your Humminbird® unit.
• Import Humminbird® Navigation Data: Insert a loaded SD card into the
control head card slot, and follow the on-screen prompts to import the
waypoints, routes, tracks, and groups.
WARNING! DO NOT import navigation data from unknown sources into your
Humminbird® unit without first converting the data to the correct format using
HumminbirdPC™. Importing corrupted data can cause the unit to malfunction,
which can result in lost navigation data.
NOTE: For more information and instructions, see the FAQ (Frequently Asked
Questions) section of our Web site at humminbird.com or call our Customer
Resource Center at 1-800-633-1468.
Export Navigation Data
The Humminbird® Waypoint Management dialog box allows you to export all of
your navigation items to an installed, unlocked SD Card. You can also export
selected items.
For more information, see Introduction to Navigation: What’s onthe Waypoint Management Dialog Box. Also, see your
Humminbird® Waypoint Management Guide for complete details.
It is important to back up your control head’s data files (waypoints,
routes, tracks, groups, recordings, etc.) periodically. You can also
save, view, and organize your navigation data on your PC using
HumminbirdPC™. See your Humminbird® online account for
details at humminbird.com.
SD Card Slot
16
To export all navigation data:
Use the following instructions to export all of the control head’s waypoints,
routes, tracks, and groups to an installed, unlocked SD card.
1. Insert an unlocked SD card into the SD card slot.
2. Open the Waypoint Management Dialog Box: Press the MENU key
twice. Press the RIGHT Cursor key until the Navigation tab is selected.
Select Waypoints, Routes, Tracks. Press the RIGHT Cursor key.
3. Select Options > Select All and... > Export.
4. Follow the on-screen instructions to confirm or cancel the export.
To export selected navigation items:
Use the following instructions to select and export specific waypoints, routes,
tracks, and groups to an installed, unlocked SD Card.
1. Insert an unlocked SD card into the SD card slot.
2. Open the Waypoint Management Dialog Box: Press the MENU key
twice. Press the RIGHT Cursor key until the Navigation tab is selected.
Select Waypoints, Routes, Tracks. Press the RIGHT Cursor key.
3. From a selected group directory in the Waypoint Management dialog
box, select Options > Select Multiple and... > Export.
4. Select Items: Press the UP or DOWN Cursor keys to scroll through the
waypoints, routes, tracks, and groups. Press the RIGHT Cursor key to
select an item. Repeat as needed.
5. Confirm Export: When you are finished selecting items, press the EXIT
key to select Export Selected. Press the RIGHT Cursor key and follow
the on-screen instructions to confirm or cancel the export.
NOTE: If an SD memory card is not installed, an error message will be displayed.
Insert the SD memory card and try again.
NOTE: The SD memory cards and USB Memory Card Reader require separate
purchases. The USB Memory Card Reader accessory can be used with your
personal computer to view and organize your exported navigation data. To
purchase this accessory, visit our Web site at humminbird.com or contact our
Customer Resource Center at 1-800-633-1468.
17
SD Card Slot
Update Software
Set up an online account at humminbird.com so that you will receive the latest
Humminbird® news and software updates for your Fishfinder. You can also
download HumminbirdPC™ from your account, which allows you to manage
your waypoints, routes, and tracks on your personal computer.
NOTE: It is important to back up your control head’s data files (waypoints,
routes, tracks, groups, recordings, etc.) periodically. Data files should also be
saved to your PC before restoring the unit’s defaults or updating the software.
See Export Navigation Data and Snapshot and Recording View for more
information. Also, contact our Customer Resource Center with any questions.
Required Equipment: Personal computer with Internet access, a formatted SD
memory card, and a USB Memory Card Reader.
NOTE: To purchase the USB Memory Card Reader (AS CR) visit our Web site at
humminbird.com or contact our Customer Resource Center at 1-800-633-1468.
Our Customer Resource Center will also assist you with any questions you might
have about updating your Humminbird® Fishfinder.
SD Card Slot
18
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