Lowrance GlobalMap Baja 840C User manual

Pub. 988-0160-441
www.lowrance.com
GlobalMap®Baja 840C
Mapping GPS Receivers
Operation Instructions

Copyright © 2007 Lowrance Electronics, Inc.
All rights reserved.
No part of this manual may be copied, reproduced, republished,
transmitted or distributed for any purpose, without prior written
consent of Lowrance Electronics. Any unauthorized commercial
distribution of this manual is strictly prohibited.
Lowrance®is a registered trademark of Lowrance Electronics, Inc.
MapCreate™, FreedomMaps™, and NauticPaths™are trademarks of
LEI. Fishing Hot Spots®is a registered trademark of Fishing Hot Spots
Inc. Navionics®is a registered trademark of Navionics, Inc. NMEA
2000®is a registered trademark of the National Marine Electronics
Association.
Points of Interest Data in this unit are by infoUSA,
copyright ©2001-2007, All Rights Reserved. infoUSA is a
trademark of infoUSA, Inc.
Additional mapping data: copyright ©2007 by Transas Ltd.; copyright
©2006 by Maptech Inc.
Lowrance Electronics 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. All screens in this manual are simulated. On the cover:
GlobalMap®Baja 840Cshown.
NMEA 2000®Certification Pending.
For free owner's manuals and other information,
visit our web site:
www.lowrance.com
Lowrance Electronics Inc.
12000 E. Skelly Dr.
Tulsa, OK USA 74128-2486
Printed in USA.

i
Table of Contents
Section 1: Read Me First! ......................................................... 1
How Lowrance GPS Works........................................................... 3
Introduction to GPS and WAAS................................................... 4
How to use this manual: typographical conventions .................. 6
Arrow Keys ................................................................................ 7
Keyboard .................................................................................... 7
Menu Commands....................................................................... 7
Instructions = Menu Sequences ............................................... 7
Section 2: Installation & Accessories.................................... 9
Preparations .................................................................................. 9
GPS Antenna/Receiver Module .................................................... 9
Power Connections ...................................................................... 10
Powering Your Display Unit ...................................................... 11
Power Diagram A ........................................................................ 12
Power Diagram B ........................................................................ 13
Powering a NMEA 2000 Network Bus ...................................... 13
NMEA 2000 Cable Connections ................................................. 14
Connecting to a NMEA 2000 Network ...................................... 14
NMEA 0183 Wiring (Data cable) ............................................... 15
Expanding to a NMEA 2000 Network ....................................... 18
Mounting the Unit: Bracket ....................................................... 20
MMC or SD Memory Card Installation ..................................... 22
Other Accessories ........................................................................ 23
Face Cover ................................................................................... 24
Section 3: Basic GPS Operations ......................................... 25
Keyboard ...................................................................................... 25
Power/lights on and off ............................................................... 26
Main Menu................................................................................... 26
Pages ............................................................................................ 28
Satellite Status Page............................................................... 28
Navigation Page ...................................................................... 29
Map Page ................................................................................. 32
GPS Quick Reference .................................................................. 37
Find Your Current Position........................................................ 38
Moving Around the Map: Zoom & Cursor Arrow Keys............. 38
Selecting Any Map Item with the Cursor.................................. 39
Searching ..................................................................................... 39
Set a Waypoint ............................................................................ 41
Navigate To a Waypoint ............................................................. 43
Set Man Overboard (MOB) Waypoint........................................ 44
Navigate Back to MOB Waypoint .............................................. 44

ii
Navigate to Cursor Position on Map.......................................... 45
Navigate to a Point of Interest ................................................... 46
Creating and Saving a Trail ....................................................... 47
Displaying a Saved Trail ............................................................ 48
Navigating Trails ........................................................................ 49
Transfer Custom Maps and GPS Data Files ............................. 52
Cancel Navigation ....................................................................... 55
Section 4: Advanced GPS Operations................................. 57
Find Distance to Another Location ............................................ 57
Find Distance From Point to Point ............................................ 57
Icons ............................................................................................. 57
Routes .......................................................................................... 59
Trails ............................................................................................ 64
Utilities ........................................................................................ 66
Waypoints .................................................................................... 66
Section 5: System & GPS Setup Options ............................ 69
Alarms.......................................................................................... 69
Auto Satellite Search .................................................................. 70
Check MMC Files and Storage Space........................................ 71
Communications Port Configuration ......................................... 71
Configure NMEA......................................................................... 72
Coordinate System Selection...................................................... 72
To setup Loran TD: ................................................................. 74
Map Fix .................................................................................... 74
Configure a map fix:................................................................ 74
Customize Page Displays............................................................ 75
GPS Simulator............................................................................. 76
To get to the GPS Simulator:.................................................. 77
Simulating Trail or Route Navigation ................................... 77
Initialize GPS .............................................................................. 78
Map Auto Zoom ........................................................................... 78
Map Data ..................................................................................... 78
Earth Map Detail .................................................................... 79
Pop-up Map Info ...................................................................... 79
Draw Map Boundaries ............................................................ 79
Fill Water with White ............................................................. 79
Trackline Extension ................................................................ 79
Presentation Mode .................................................................. 80
Safety Contour......................................................................... 80
Map Overlays (Range Rings; Lat/Long Grid) ........................ 80
Map Datum Selection.................................................................. 81
Map Detail Category Selection................................................... 81
Map Orientation.......................................................................... 82

iii
NauticPath™USA Marine Charts............................................. 83
Nautical Chart Notes .............................................................. 83
Port Information...................................................................... 84
Tidal Current Information...................................................... 85
Tide Information ..................................................................... 87
Navionics®Charts ....................................................................... 88
Overlay Data ............................................................................... 89
Pop-up Help ................................................................................. 95
Reset Options............................................................................... 96
Screen Contrast and Brightness ................................................ 96
Set Language ............................................................................... 97
Set Local Time ............................................................................. 97
Show WAAS Alarm ..................................................................... 98
Software Version Information .................................................... 99
Sounds and Alarm Sound Styles ................................................ 99
Track Smoothing ....................................................................... 100
Trail Options.............................................................................. 101
Transparency............................................................................. 103
Units of Measure ....................................................................... 104
Section 6: Searching............................................................. 105
Find Addresses .......................................................................... 105
Find Any Item Selected by Map Cursor .................................. 108
Find Interstate Highway Exits ................................................ 109
Find Map Places or Points of Interest (POI) ........................... 111
Find Streets or Intersections.................................................... 112
Find Waypoints ......................................................................... 116
Section 7: NMEA 2000 Device Configuration................. 119
NMEA 2000 Menu..................................................................... 119
Bus Setup................................................................................... 119
Engine & Tank Configuration.................................................. 120
Device Configuration Menu.................................................. 122
Device Information and Device Data ................................... 122
Fuel Management Menu........................................................... 123
Adding Fuel to Tank ............................................................. 124
Engine Operations................................................................. 124
NMEA 2000 Alarms .................................................................. 125
Waypoint Sharing ..................................................................... 126
To turn on/off Waypoint Sharing: ............................................ 126
Backlight Synchronization ....................................................... 126
Configuring EP Sensors............................................................ 126
EP-35 Temperature Configuration ...................................... 126
Advanced Options menu ....................................................... 127
EP-10 Fuel Flow Configuration............................................ 128

iv
Advanced Options menu ....................................................... 129
EP-15 Fluid Level Configuration ......................................... 130
Advanced Options menu ....................................................... 131
Suzuki Engine Interface Configuration............................... 132
Advanced Options menu ....................................................... 133
Calibrating EP Sensors............................................................. 134
EP-10 Fuel Flow Calibration................................................ 134
EP-15 Fluid Level Calibration ............................................. 136
Fuel Flow Calibration in a Suzuki Engine Interface.......... 139
Engine Trim Calibration....................................................... 140
Reset Trim Calibration ......................................................... 140
Bennett Trim Tabs Calibration ............................................ 141
Section 8: Supplemental Material ..................................... 143

v
WARNING!
A CAREFUL NAVIGATOR NEVER RELIES ON ONLY ONE METHOD
TO OBTAIN POSITION INFORMATION.
CAUTION
When showing navigation data to a position (waypoint), a GPS unit will show
the shortest, most direct path to the waypoint. It provides navigation data to the
waypoint regardless of obstructions. Therefore, the prudent navigator will not
only take advantage of all available navigation tools when traveling to a way-
point, but will also visually check to make sure a clear, safe path to the waypoint
is always available.
WARNING!
When a GPS unit is used in a vehicle, the vehicle operator is solely re-
sponsible for operating the vehicle in a safe manner. Vehicle operators
must maintain full surveillance of all pertinent driving, boating or flying
conditions at all times. An accident or collision resulting in damage to
property, personal injury or death could occur if the operator of a GPS-
equipped vehicle fails to pay full attention to travel conditions and vehi-
cle operation while the vehicle is in motion.

vi
Notes

1
Section 1: Read Me First!
How this manual can get you out on the road, fast!
Welcome to the exciting world of GPS satellite navigation! We know
you're anxious to begin finding your way with this space-age technol-
ogy, but we have a favor to ask. Before you grab the GlobalMap Baja®
and begin installing it, please give us a moment or two to explain how
our manual can help you get the best performance from your high-
resolution, high-performance GPS+WAAS chart recorder.
First, we want to thank you for buying a Lowrance GPS unit. Whether
you're a first time user or a professional navigator, you'll discover that
your GlobalMap Baja is easy to use, yet capable of handling demanding
navigation tasks. When you team your unit with our custom mapping
software MapCreate™, you have an incredible combination. No other
consumer GPS mapping system on the market offers so much informa-
tion and so many features in one package.
Our goal for this book is to get you on the road fast, with a minimum of
fuss. Like you, we'd rather spend more time navigating and less time
reading the manual!
So, we designed our book so that you don't have to read the whole thing
from front to back for the information you want. At the start (or end) of
each segment, we'll tell you what content is coming up next. If it's a
concept you're already familiar with, we'll show you how and where to
skip ahead for the next important topic. We've also made it easy to look
up any tips you may need from time to time. Here's how:
The manual is organized into 8 sections. This first section is an intro-
duction to Lowrance GPS. It tells you the basics you need to know be-
fore you can make the unit look around and tell you where you are.
Section 2 will help you install your unit and the GPS antenna module.
We'll show you how to get the MultiMedia Card (MMC) correctly in-
stalled inside the unit. We'll also tell you about some of the available
accessories.
Section 3 covers Basic GPS Operation. It will show you how easy it is to
run the GlobalMap Baja, right out of the box. This section features a
one-page GPS Quick Reference. (If you've already jumped ahead
and figured out how to install the unit yourself, and you just
can't wait any longer, turn to the Quick Reference on page 37
and head for the road with your GPS unit!)

2
Section 3 contains short, easy-to-scan GPS lessons that follow one an-
other in chronological order. They're all you'll need to know to find your
way on the water or in the wilderness quickly.
After you've learned the basics (or if you already have some GPS ex-
perience), you may want to try out some of the GlobalMap Baja's many
advanced navigation features. That brings us to Section 4, Advanced
GPS Operations. This section contains the rest of the unit's GPS com-
mand functions, organized in alphabetical order.
When you come to a GPS menu command on the GlobalMap Baja's screen,
you can look it up in the manual by skimming over the table of contents,
just flipping through Section 3 or scanning through the command portion
of Section 4.
This unit is ready to use right out of the box, but you can fine tune and
customize its operation with dozens of options. We describe how to use
general system options along with GPS options in Section 5, System Setup
and GPS Setup Options. Section 5 is organized in alphabetical order.
In Section 6, we go into more detail on one of the GlobalMap Baja's most
remarkable capabilities — Searching. We'll introduce a search example in
the Basic GPS Operation section, but there are so many map items you
can search for, we had to give this function its own section in the manual!
For example, did you know this unit can look up business phone numbers,
functioning as a virtual Yellow Pages? We’ll show you how in Section 6.
In Section 7, we explain how to use the NMEA 2000 network that allows
you to configure, calibrate and monitor devices on a NMEA 2000 net-
work.
Finally, in Section 8, we offer Supplemental Material, including a list of
the GPS datums used, warranties and customer service information.
NOTICE!
The storage and operation temperature range for your unit is from -
20 degrees to +167 degrees Fahrenheit (-28 degrees to +75 degrees
Celsius). Extended storage or operation in temperatures higher or
lower than specified will damage the liquid crystal display in your
unit. This type of damage is not covered by the warranty. For more
information, contact the factory's Customer Service Department;
phone numbers are listed on the last page of the manual.

3
How Lowrance GPS Works
You'll navigate faster and easier if you understand how the GlobalMap
Baja scans the sky to tell you where you are on the earth — and, where
you're going (But if you already have a working understanding of GPS
receivers and the GPS navigation system, skip on ahead to Section 2,
Installation & Accessories on page 9. If you're new to GPS, read on, and
you can later impress your friends with your new-found knowledge.).
First, think of your unit as a small but powerful computer (But don't
worry — we made it easy to use, so you don't need to be a computer ex-
pert to find your way!). The GlobalMap Baja includes a keypad and a
screen with menus so you can tell it what to do. The screen also lets the
unit show your location on a moving map, as well as point the way to
your destination.
This gimbal-mounted GlobalMap Baja uses an external an-
tenna/receiver module, which makes the whole system work something
like your car radio. But instead of your favorite dance tunes, this re-
ceiver tunes in to a couple of dozen GPS satellites circling the earth (It
will also listen in to the WAAS satellites in orbit, but more about that
in the upcoming segment introducing you to GPS and WAAS.).
Your unit listens to signals from as many satellites as it can "see"
above the horizon, eliminates the weakest signals, then computes its
location in relation to those satellites. Once the GlobalMap Baja figures
its latitude and longitude, it plots that position on the moving map
shown on the screen. The whole process takes place several times a
second!
The performance doesn't stop there. Stored in the permanent memory
of each unit is a basic background map of the entire world. We lock it in
here at the factory — you can't change or erase this map.
The background map is suitable for many navigation chores, but for
maximum accuracy and much more detail, you need our optional map-
making software, MapCreate™. Some unit features — such as search-
ing for businesses and addresses — won't work without a custom Map-
Create map. There is so much detail in our background map (and even
more in MapCreate) that we'll describe their contents and differences
in Section 3, Basic GPS Operations, on page 25.
Another portion of the GlobalMap Baja's onboard memory is devoted to
recording GPS navigation information, which includes waypoints, event
marker icons, trails and routes. This lets you look back the way you came.
Think of this data storage like the hard drive memory in a computer or a

4
tape in a cassette tape recorder. You can save several different GPS data
files, erase 'em and record new ones, over and over again. Like any com-
puter file, these GPS Data Files (file format *.usr) can be shared be-
tween Lowrance GPS or sonar/GPS units or even personal computers.
This GlobalMap Baja has one more thing in common with a personal
computer. Just as computers have a floppy disk drive for storing and ex-
changing files, the unit has a slot for an MMC (MultiMedia Card) or SD
(Secure Digital) card flash memory card. These solid-state memory de-
vices are about the size of a postage stamp, but can hold data ranging
from 8 MB to 1 GB in size (Compare that to a floppy disk's 1.44 MB ca-
pacity!). This unit uses all that MMC space for two key GPS purposes.
First, you can backup your onboard GPS Data Files by copying them to
the MMC. Since the MMC is removable (like a floppy disk or a cassette
tape), you can store these GPS Data Files on a personal computer
equipped with an MMC card reader (Or store them on a pocketful of
MMCs, if you don't have a computer.). Our MapCreate mapping software
can save, edit or create its own GPS Data Files, which can be copied to the
MMC and then loaded from the MMC into the unit's memory (NOTE: No
matter where they come from, GPS Data Files must be loaded from the
MMC into memory before the GlobalMap Baja can use them.).
The other key GPS use for MMCs is storage of special high-detail, cus-
tom maps, which you can produce on your computer with our MapCre-
ate software. These MapCreate custom maps contain more detail than
the basic background map. These Custom Map Files (file format
*.lcm) can also be shared between Lowrance GPS or sonar/GPS units
and personal computers.
This unit automatically reads Custom Map Files directly from the
MMC or SD card. To use a custom map, all you need to do is slide an
MMC containing a map into the GlobalMap Baja 840c.
Introduction to GPS and WAAS
Well, now you know the basics of how the unit does its work. You might
be ready to jump ahead to Section 2, Installation & Accessories, on page
9, so you can mount your GlobalMap Baja and plug in the power. Or
you might want to see how our text formatting makes the manual tuto-
rials easy to skim. If that's the case, move on to "How to Use This Man-
ual" on page 6. But, if you want to understand the current state of sat-
ellite navigation, look over this segment describing how GPS and its
new companion WAAS work together to get you where you're going.
The Global Positioning System (GPS) was launched July 17, 1995 by
the United States Department of Defense. It was designed as a 24-
hour-a-day, 365-days-a-year, all weather global navigation system for

5
the armed forces of the U.S. and its allies. Civilian use was also avail-
able at first, but it was less accurate because the military scrambled
the signal somewhat, using a process called Selective Availability (SA).
GPS proved so useful for civilian navigation the federal government
discontinued SA on May 2, 2000, after the military developed other
methods to deny GPS service to enemy forces. Reliable accuracy for ci-
vilian users jumped from 100 meters (330 feet) under SA to the present
level of 10 to 20 meters (about 30 to 60 feet).
A minimum of three satellites are required to determine a 2D fix.
Twenty-four satellites orbit 10,900 nautical miles above the Earth,
passing overhead twice daily. A series of ground stations (with pre-
cisely surveyed locations) controls the satellites and monitors their ex-
act locations in the sky. Each satellite broadcasts a low-power signal
that identifies the satellite and its position above the earth. Three of
these satellites are spares, unused until needed. The rest virtually
guarantee that at least four satellites are in view nearly anywhere on
Earth at all times.
The system requires signal reception from three satellites in order to
determine a position. This is called a 2D fix. It takes four satellites to
determine both position and elevation (your height above sea level —
also called altitude). This is called a 3D fix.
Remember, the unit must have a clear view of the satellites in order to
receive their signals. Unlike radio or television signals, GPS works at
very high frequencies. These signals can be easily blocked by trees,
buildings, an automobile roof, even your body.
Like most GPS receivers, this unit doesn’t have a compass or any other
navigation aid built inside. It relies solely on the signals from the satel-
lites to calculate a position. Speed, direction of travel, and distance are
all calculated from position information. Therefore, in order for the

6
GlobalMap Baja to determine direction of travel, you must be moving
and the faster, the better. This is not to say that it won’t work at walk-
ing or trolling speeds — it will. There will simply be more "wandering"
of the data shown on the display.
GPS is plenty accurate for route navigation, but the U.S. Federal Avia-
tion Administration has special needs for aircraft traffic control that go
beyond basic GPS. The FAA has a program to boost GPS performance
even further with its Wide Area Augmentation System, or WAAS. This
GPS add-on will include a time control element that will help airliners
fly closer together while avoiding collisions. In addition to carefully
spacing airplanes along travel corridors, WAAS will eventually make
instrument landings and takeoffs more accurate as it replaces existing
aviation navigation systems.
Non-aviators can use WAAS signals to make their GPS navigation even
more accurate. Your unit receives both GPS and WAAS signals. How-
ever, WAAS has some limits you should know about.
WAAS can boost the accuracy of land GPS navigation, but the system
is designed for aircraft. The satellites are in a fixed orbit around the
Equator, so they appear very low in the sky to someone on the ground
in North America. Aircraft and vessels on open water can get consis-
tently good WAAS reception, but terrain, foliage or even large man-made
structures frequently block the WAAS signal from ground receivers.
You'll find that using your GPS receiver is both easy and amazingly
accurate. It’s easily the most accurate method of electronic navigation
available to the general public today. Remember, however, that this
receiver is only a tool. Always have another method of navigation avail-
able, such as a map or chart and a compass.
Also remember that this unit will always show navigation information
in the shortest line from your present position to a waypoint, regardless
of terrain! It only calculates position, it can’t know what’s between you
and your destination, for example. It’s up to you to safely navigate
around obstacles, no matter how you’re using this product.
How to use this manual: typographical conventions
Many instructions are listed as numbered steps. The keypad and arrow
"keystrokes" appear as boldface type. So, if you're in a real hurry (or
just need a reminder), you can skim the instructions and pick out what
menu command to use by finding the boldface command text. The fol-
lowing paragraphs explain how to interpret the text formatting for
those commands and other instructions:

7
Arrow Keys
The arrow keys control the movement of dotted cross-hair lines on your
mapping screen called the cursor. The arrow keys help you move
around the menus so you can execute different commands. They are
represented by symbols like these, which denote the down arrow key,
the up arrow, the left arrow and the right arrow: ↓↑←→.
Keyboard
The other keys perform a variety of functions. When the text refers to a
key to press, the key is shown in bold, sans serif type. For example, the
"Enter/Icons" key is shown as ENT and the "Menu" key is shown as
MENU.
Menu Commands
A menu command or a menu option will appear in small capital letters,
in a bold sans serif type like this: ROUTE PLANNING. These indicate that
you are to select this command or option from a menu or take an action
of some kind with the menu item. Text that you may need to enter or
file names you need to select are show in italic type, such as trail name.
Instructions = Menu Sequences
Most functions you perform with this unit are described as a sequence
of key strokes and selecting menu commands. We've written them in a
condensed manner for quick and easy reading.
For example, instructions for navigating a trail would look like this:
1. From the Map Page, press MENU|MENU|↓to MY TRAILS|ENT.
2. Press ↓to Trail 1|ENT|→|↓to NAVIGATE|ENT.
3. You are asked to wait while it converts the trail into a route.
4. The wait message disappears and the GlobalMap Baja begins
showing navigation information along the trail. Now, begin
moving and follow your GlobalMap Baja.
Translated into complete English, step 1 above would mean: "Start on
the Map Page. Press the Menu key twice. Next, repeatedly press (or
press and hold) the down arrow key to scroll down the menu and select
(highlight) the My Trails menu command. Finally, press the Enter key."
Step 2 would mean: "Press the down arrow key repeatedly to scroll to
the trail named Trail 1, and press Enter. Next, press the right arrow
key and then the down arrow key to highlight the Navigate command,
then press Enter."

8
Notes

9
Section 2:
Installation & Accessories
Preparations
You can install the GPS system in some other order if you prefer, but
we recommend this installation sequence:
Caution:
You should read over this entire installation section before drill-
ing any holes in your vehicle or vessel!
1. Determine the approximate location for the GPS unit, so you can
plan how and where to route the cables for the antenna and power.
This will help you make sure you have enough cable length for the de-
sired configuration.
2. Determine the approximate location for the GPS antenna module
and its cable route.
3. Determine the location of your battery or other power connection,
along with the power cable route.
4. Install the GPS antenna and route the antenna cable to the GPS
unit.
5. Install the power cable and route it to the GPS unit.
6. Mount the GPS unit.
GPS Antenna/Receiver Module
The unit packages covered in this manual includes the LGC-3000 GPS
module. This device contains the unit's external antenna and receiver
for GPS and WAAS signals. The antenna/receiver module comes with a
15-foot extension cable. This module can be mounted on a flat surface
or optional pole, or an optional magnet is available for temporary
mounting on any ferrous surface.
LGC-3000 Module, bottom view (left) and top view (right).

10
You need to select an antenna installation location that has a clear, un-
obstructed view of the sky. After the module is installed, connect it to the
unit. The LGC-3000 can communicate with your GPS unit either directly
(using the supplied extension cable) or through a NMEA 2000®network.
NOTE:
See the module’s instruction sheet, publication part number 988-
0154-651, for complete installation instructions.
In an automobile, you may achieve good results by simply placing the
external antenna on the top of the dash, at the base of the windshield. A
piece of the rubber non-skid shelf liner material available in recreational
vehicle supply stores will help hold the antenna in place. This may not
work well if you have a cab-over design pickup truck camper or motor
home. If dashboard reception is poor, simply relocate the antenna module
elsewhere on the vehicle for a clearer view of the sky.
Power Connections
Your unit comes with a power/data cable that splits into three branches,
each with several exposed wires.
The thicker two-wire cable (red and black) is the power supply for your
display unit. This cable has no label.
The branch with three wires (red, black and shield) is the power cable for
a NMEA 2000 network. It is labeled "NMEA 2000 POWER."
The branch with 5 wires (blue, yellow, orange, green and shield) is a data
cable, labeled "RS-232 COMM." It supports two serial communication
ports. These allow your unit to exchange NMEA 0183 data with another
device, such as an autopilot, DSC marine radio or computer.
The Power/Data cable for this unit.
To unit
Display unit power wires:
red and black
NMEA 2000 power wires:
red, black and shield
Data cable wires: blue,
yellow, orange, green
and shield

11
NOTE:
There are two basic power connection options, which are shown in the
following two diagrams. Read the following instructions carefully
to determine which power connection applies to your unit. De-
pending on your configuration, you may not use all of these wires.
Caution:
All of the wires in the power/data cable have bare ends for eas-
ier installation. The bare ends on any unused wires could cause
an electrical short if left exposed. To prevent this, you should
cover the individual wire ends – either by capping them with
wire nuts, wrapping them with electrical tape or both. (You
should cut off the bare wire before taping off the ends.)
Powering Your Display Unit
The display unit works from a 12-volt DC battery system. Attach the
display power cable (with provided 3-amp fuse) to an accessory switch
or power bus. If this results in electrical interference, connect direct to
a battery but install an in-line switch on the cable.
Caution:
We strongly recommend that you shut off the power supply to the
power cable when the unit is not in use, especially in saltwater en-
vironments. When the unit is turned off but still connected to a
power supply, electrolysis can occur in the power cable plug. This
may result in corrosion of the plug body along with the electrical
contacts in the cable and the unit's power socket. Risk of electroly-
sis corrosion is even greater when the cable is unplugged from the
unit, but still connected to a power source.
We recommend you connect the power cable to the auxiliary power
switch included in most boat designs. If that results in electrical
interference, or if such a switch is not available, we recommend
connecting direct to the battery and installing an in-line switch.
This will let you shut off power to the power cable when the unit is
not in use. When you are not using the unit, you should always
shut off power to the power cable, especially when the power cable
is disconnected from the unit.
WARNING:
This product must be independently fused with the en-
closed 3-amp fuse (or equivalent), even if you connect to
a fused accessory or power bus.
If a malfunction happens inside the unit, extensive damage can
occur if the enclosed fuse is not used. As with all electrical devices,

12
this unit could be damaged to a point that it is irreparable and
could even cause harm to the user when not properly fused.
Failure to use a 3-amp fuse will void your warranty.
If possible, keep the power cable away from other boat wiring, especially
the engine's wires. This will provide the best isolation from electrical
noise. If the cable is not long enough, splice #18 gauge wire onto it.
The display power cable has two wires, red and black. Red is the positive
(+) lead, black is negative (–) or ground. Make sure to attach the in-line
fuse holder to the red lead as close to the power source as possible.
For example, if you have to extend the power cable to the power bus or
battery, attach one end of the fuse holder directly to the power bus or
battery. This will protect both the unit and the power cable in the event
of a short.
This unit has reverse polarity protection. No damage will occur if the
power wires are reversed. However, the unit will not work until the
wires are attached correctly.
Power Diagram A
Use this method if you are powering the display unit and a GPS mod-
ule or the display unit and a NMEA 2000 network.
Shield
Mandatory
network
power-off
switch
Black
Black
Red
Recommended
display unit
p
ower-off switch
To unit
12 volt DC
power source
Data Cable
NMEA 2000
Power Cable
3-amp fuse
3-amp fuse
Display Unit
Power Cable