Garmin GPSMAP 378 - Marine GPS Receiver User manual

Owner’s Manual
chartplotting receiver
GPSMAP 378/478
GPSMAP 478 shown

© 2009 Garmin Ltd. or its subsidiaries
Garmin International, Inc.
1200 East 151st Street,
Olathe, Kansas 66062, USA
Tel. [phone] or [phone]
Fax [phone]
Garmin (Europe) Ltd.
Liberty House
Hounsdown Business Park,
Southampton, Hampshire, SO40 9RB UK
Tel. [phone] (outside the UK)
0808 2380000 (within the UK)
Fax [phone]
Garmin Corporation
No. 68, Jangshu 2nd Road,
Shijr, Taipei County, Taiwan
Tel. [phone]
Fax [phone]
January 2009 Part Number 190-00683-00 Rev. C Printed in Taiwan
All rights reserved. Except as expressly provided herein, no part of this manual may be reproduced, copied, transmitted, disseminated, downloaded or stored in any storage
medium, for any purpose without the express prior written consent of Garmin. Garmin hereby grants permission to download a single copy of this manual onto a hard drive or
other electronic storage medium to be viewed and to print one copy of this manual or of any revision hereto, provided that such electronic or printed copy of this manual must
contain the complete text of this copyright notice and provided further that any unauthorized commercial distribution of this manual or any revision hereto is strictly prohibited.
Information in this document is subject to change without notice. Garmin reserves the right to change or improve its products and to make changes in the content without
obligation to notify any person or organization of such changes or improvements. Visit the Garmin Web site (www.garmin.com) for current updates and supplemental
information concerning the use and operation of this and other Garmin products.
Garmin
®
, the Garmin logo, AutoLocate
®
, TracBack
®
, BlueChart
®
, City Select
®
, MapSource
®
, and See-Thru
®
are trademarks of Garmin Ltd. or its subsidiaries, registered in
the USA and other countries. These trademarks may not be used without the express permission of Garmin.

IntroductIon
Thank you for choosing the Garmin
®
GPSMAP
®
378/478, which
utilizes the proven performance of Garmin GPS and full-featured
mapping to create an unsurpassed portable marine navigation
chartplotter and automobile navigation device. Take a moment to
compare the contents of this package with the packing list on the
outside of the box; if any pieces are missing, contact your Garmin
dealer immediately.
About This Manual
To get the most out of your new navigation system, take time to read
this manual and learn the operating procedures for your unit. This
manual is organized into the following sections:
The Introduction contains the Table of Contents, Care Information,
and Warnings.
The Getting Started section provides an overview of the unit, how
to turn the unit on, and how to simulate navigation.
The Marine Mode section provides you with information about
navigating with the GPSMAP 378/478 in Marine Mode.
The Marine Mode Pages section reviews the main pages in Marine
Mode.
The Automotive Mode section provides you with information about
navigating with the GPSMAP 378/478 in Automotive Mode.
The Automotive Mode Pages section reviews the main pages in
Automotive Mode.
The Main Menu section describes features found on the Main
Menu, and information on how to change settings.
The Using XM WX Weather section describes how to use XM WX
Satellite Weather features on your GPSMAP 378/478.
The Setting Up and Using Sonar section provides instructions
on using a Garmin GSD 20 or GSD 21 Sounder Module with your
GPSMAP 378/478.
The Appendix contains specications, optional accessories,
maintenance information, and other product information.
An Index is provided at the end of the manual for reference.
GPSMAP 378/478 Owner’s Manual i
IntroductIon > About thIs MAnuAl

Table of Contents
Introduction...........................................................................i
Caring for the GPSMAP 378/478 ........................................... iv
Warnings .................................................................................. v
Important Information ............................................................ vi
Battery Warnings.................................................................... vi
Getting Started.....................................................................1
Unit Overview .......................................................................... 1
Charging the GPSMAP 378/478.............................................. 2
Turning On the GPSMAP 378/478 .......................................... 3
Getting Satellite Signals ......................................................... 4
Using the GPSMAP 378/478 Keypad...................................... 7
Using the GPSMAP 378/478.................................................... 8
Using Simulator Mode .......................................................... 12
Marine Mode.......................................................................13
Marine Mode Pages............................................................... 13
Navigating to a Destination .................................................. 14
Finding an Item...................................................................... 17
Creating and Using Routes .................................................. 20
Creating and Using Waypoints ............................................ 24
Managing Your Tracks .......................................................... 34
Marine Mode Pages...........................................................38
Map Page................................................................................ 38
Compass Page....................................................................... 45
Highway Page ........................................................................ 48
Active Route Page................................................................. 50
Position Data Page................................................................ 51
XM Audio Page ...................................................................... 52
Automotive Mode ..............................................................56
Automotive Mode Pages....................................................... 56
Navigating in Automotive Mode........................................... 57
Editing Your Route ................................................................ 60
Following an Automotive Route........................................... 63
Automotive Mode Pages...................................................64
Map Page................................................................................ 64
Current Route Page............................................................... 65
Trip Computer Page .............................................................. 66
Main Menu..........................................................................67
Main Menu Tabs..................................................................... 67
GPS Tab.................................................................................. 68
Weather Tab ........................................................................... 68
XM Tab.................................................................................... 69
Route Tab ............................................................................... 70
Points Tab .............................................................................. 70
Track Tab................................................................................ 71
DSC Tab.................................................................................. 71
Sonar Tab ............................................................................... 75
Alarms Tab ............................................................................. 76
Calendar Tab.......................................................................... 78
Celestial Tab........................................................................... 79
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Message Tab .......................................................................... 83
Display Tab............................................................................. 84
Sound Tab .............................................................................. 85
Setup Tab ............................................................................... 86
Using XM WX Weather ......................................................95
Viewing XM WX Weather....................................................... 95
Setting XM WX Weather Options ......................................... 95
Using the Weather Tab.......................................................... 98
Finding Weather Information.............................................. 101
Setting Up and Using Sonar...........................................103
Showing Sonar on the Map Page....................................... 103
Using the Sonar Page ......................................................... 104
Setting Up Sonar ................................................................. 108
Understanding Sonar.......................................................... 112
Appendix ..........................................................................115
Specications ...................................................................... 115
Optional Accessories.......................................................... 116
Installation Information....................................................... 117
Satellite Information............................................................ 122
What is Differential GPS (DGPS)? ..................................... 122
LORAN TD Setup................................................................. 124
Map Datums and Location Formats .................................. 126
Digital Selective Calling (DSC)........................................... 127
Messages ............................................................................. 129
Data Field Options............................................................... 131
Software License Agreement ............................................. 133
Product Registration........................................................... 133
Limited Warranty ................................................................. 134
Weather Data Warranty ....................................................... 135
XM Satellite Radio Service Agreement.............................. 136
FCC Compliance.................................................................. 137
Index .................................................................................138
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Caring for the GPSMAP 378/478
The GPSMAP 378/478 case is constructed of high quality materials
and does not require user maintenance except cleaning.
Cleaning the Case
Clean the unit’s outer casing (except for the screen) using a cloth
dampened with a mild detergent solution and then wipe dry.
Avoid chemical cleaners and solvents that might damage plastic
components.
Cleaning the Screen
The GPSMAP 378/478 screen should be cleaned using a soft, clean,
lint-free cloth. Water, isopropyl alcohol, or eyeglass cleaner can be
used if needed. If these are used, apply the liquid to the cloth and
then gently wipe the screen with the moistened cloth.
Storage
Do not store the GPSMAP 378/478 where prolonged exposure
to temperature extremes might occur (such as in the trunk of a
car) as permanent damage could result. User information, such as
waypoints and routes, is retained in the unit’s memory without the
need for external power. It is always a good practice to back up
important user data by manually recording it or downloading it to a
computer (transferring it to MapSource).
Water Immersion
The GPSMAP 378/478 is waterproof to IEC Standard
60529 IPX7. It can withstand immersion in 1 meter of water for 30
minutes. Prolonged submersion can cause damage to the unit. After
submersion, be certain to wipe and air dry the unit before reuse or
charging.
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Failure to avoid the following potentially hazardous situations could
result in an accident or collision resulting in death or serious injury.
• When installing the unit in a vehicle, place the unit securely so that
it does not obstruct the driver’s view of the road or interfere with
vehicle operating controls, such as the steering wheel, foot pedals,
or transmission levers. Do not place in front of or above any airbag.
(See diagram.)
Do not mount
where driver’s
eld of vision is
blocked.
Do not place
unsecured on
the vehicle
dashboard.
Do not mount in front of an airbag
eld of deployment.
• When navigating, carefully compare information displayed on the
unit to all available navigation sources, including information from
street signs, visual sightings, and maps. For safety, always resolve
any discrepancies or questions before continuing navigation and
defer to posted road signs.
• Always operate the vehicle in a safe manner. Do not become
distracted by the unit while driving, and always be fully aware
of all driving conditions. Minimize the amount of time spent
viewing the unit’s screen while driving and use voice prompts
when possible. Do not input destinations, change settings, or access
any functions requiring prolonged use of the unit’s controls while
driving. Pull over in a safe and legal manner before attempting such
operations.
• This unit is designed to provide route suggestions. It is not designed
to replace the need for driver attentiveness regarding road closures
or road conditions, trafc congestion, weather conditions, or other
factors that may affect safety while driving.
• Use the electronic chart in the unit only to facilitate, not to replace,
the use of authorized government charts. Ofcial government charts
and notices to mariners contain all information needed to navigate
safely.
• Use this unit only as a navigational aid. Do not attempt to use the
unit for any purpose requiring precise measurement of direction,
distance, location, or topography.
Warnings
WARNING: This product, its packaging, and its components contain chemicals known to the State of California to cause cancer, birth defects, or reproductive
harm. This Notice is provided in accordance with California’s Proposition 65. See www.garmin.com/prop65 for more information.
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Important Information
MAP DATA INFORMATION: One of the goals of Garmin is to provide
customers with the most complete and accurate cartography that is available
to us at a reasonable cost. We use a combination of governmental and private
data sources, which we identify in product literature and copyright messages
displayed to the consumer. Virtually all data sources contain some inaccurate or
incomplete data. In some countries, complete and accurate map information is
either not available or is prohibitively expensive.
NOTICE REGARDING WINDSHIELD MOUNTING; SPECIAL
NOTICE TO DRIVERS IN CALIFORNIA AND MINNESOTA: State law
prohibits drivers in California and Minnesota from using suction mounts on
their windshields while operating motor vehicles. Check your state and local
laws and ordinances for similar restrictions. Other Garmin dashboard or friction
mounting options should be used. Garmin does not take any responsibility for
any nes, penalties, or damages that may be incurred as a result of disregarding
this notice or as a result of any other state or local law or ordinance relating
to use of the unit. (See California Vehicle Code Section 26708(a); Minnesota
Statutes 2005, Section 169.71.)
The California Electronic Waste Recycling Act of 2003 requires the
recycling of certain electronics. For more information on the applicability to
this product, see www.erecycle.org.
Battery Warnings
If these guidelines are not followed, the internal lithium-ion battery may
experience a shortened life span or may present a risk of damage to the GPS
unit, re, chemical burn, electrolyte leak, and/or injury.
• Do not leave the unit exposed to a heat source or in a high temperature
location, such as in the sun in an unattended vehicle. To prevent
damage, remove the unit from the vehicle or store it out of direct
sunlight, such as in the glove box.
• Do not puncture or incinerate.
• When storing the unit for an extended time, store within the following
temperature range: 32° to 77°F (0° to 25°C).
• Do not operate the unit outside of the following temperature range: -4°
to 131°F (-20° to 55°C).
• Contact your local waste disposal department to properly recycle/
dispose of the unit/battery.
Additional User-Replaceable Battery Warnings:
• Do not use a sharp object to remove the battery.
• Keep the battery away from children.
• Do not disassemble, puncture, or damage the battery.
• If using an external battery charger, only use the Garmin accessory
approved for your product.
• Only replace the battery with the correct replacement battery. Using
another battery presents a risk of re or explosion. To purchase a
replacement battery, see your Garmin dealer or the Garmin Web site.
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IntroductIon > IMPortAnt InforMAtIon And bAttery WArnIngs

GettInG Started
Unit Overview
The GPSMAP 378/478 is an all-in-one, versatile color chartplotter and automobile navigator—perfect for land or water. This portable GPS
navigator features a 256-color TFT display that is easy to read in bright sun and includes built-in g2 cartography (GPSMAP 478) or built-in
lake cartography (GPSMAP 378), and preloaded City Navigator NT
®
to provide you with automatically generated turn-by-turn directions.
With the optional GXM 30 antenna and a subscription to XM WX Satellite Weather, users have constant access to NEXRAD radar, lightning,
wind speed, wave direction, and more. In addition, the GPSMAP 378/478 offers XM Satellite Radio capabilities featuring more than 160
digital channels of commercial-free music; more than 30 channels of news, sports, talk, and entertainment; and more than 20 dedicated
channels of XM Instant Trafc & Weather.
External power
connector under
weather cap
USB/GXM 30
antenna connector
under weather cap Slot for optional data card
Battery pack. Press tab down
to remove battery pack for
replacement, if necessary.
Backlit keypad for easy nighttime operation
GPS antenna
256-Color TFT display
with backlighting
Detachable GPS antenna
collapses for storage.
Be sure the antenna is
up (as shown here)
to receive satellite
signals. See the
“Appendix”,
page 122, for
instructions on
removing the
antenna.
Serial number Headphone/stereo jack
under weather cap
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Charging the GPSMAP 378/478
Before using the GPSMAP 378/478, you might need to charge
the battery. Plug the power cable into an external power source to
charge. You can use the unit while it is charging.
To charge the unit’s battery:
1. Lift the rubber weather cap to expose the power connector
on the back of the unit. See the image on page 1 for
connector location.
2. Align the notches and push the plug into the connector until
fully seated.
3. Plug the 12-Volt adapter into an available AC outlet, or
cigarette lighter receptacle if you have a cigarette lighter
adapter. Use care when routing the cable; make sure it does
not interfere with vehicle operation. The unit begins charging
as soon as external power is applied.
TIP: Placing the unit in Charge Mode charges the unit more
quickly than when the unit is turned on, and reduces draw on the
vehicle/vessel battery.
When you turn on the GPSMAP 376C the power source indicator on
the GPS tab shows the unit is operating off battery power ( ),
that the unit is charging ( ), or that an external power source is
in use ( ).
Using Charge Mode
If you want to charge the battery when you are not using the unit,
you can put the unit into Charge Mode.
NOTE: While in Charge Mode, the GPSMAP 378/478 draws a
small amount of current from the vessel/vehicle battery. To avoid
discharging the vehicle’s battery, disconnect the external power
cable from the unit when not in use for several days.
Over time, you might notice that the lithium-ion battery in the unit
is not holding a charge any more. This is common for lithium-ion
batteries. Contact Garmin or your Garmin dealer to order a battery
pack replacement if you are experiencing charging issues.
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Turning On the GPSMAP 378/478
Before you turn on the GPSMAP 378/478, be sure the antenna is up
as shown on page 1, and it has a clear and unobstructed view of the
sky to receive satellite signals.
The rst time you turn on your GPSMAP 378/478, the GPS receiver
must collect satellite data and establish its current location. To
ensure proper initialization, the GPSMAP 378/478 is shipped from
the factory in AutoLocate Mode, which allows the receiver to “nd
itself” anywhere in the world.
To turn the GPSMAP 378/478 on and off:
1. Press and hold the POWER key. When the unit turns on, a
tone sounds and the Warning Page opens.
Warning Page
2. Read the warning, and then press ENTER to continue.
3. To turn off the GPSMAP 378/478, press and hold the
POWER key again.
Adjusting the Backlight and Volume
You can adjust the backlight to see the screen better. If you are
using the external speaker with 12/24-Volt adapter cable with
the GPSMAP 378/478 or you have headphones plugged into the
headphone jack, you can adjust the volume level of the audio output.
To adjust the backlight level or volume:
1. Press and quickly release the POWER key.
2. Press up on the ROCKER to increase the brightness or
press down to decrease. Press right to raise the volume or
left to lower.
3. Press ENTER or QUIT to close the Backlight/Volume
adjustment window.
Backlight
adjustment slider
Volume
adjustment slider
Battery time remaining and power source indicator
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Getting Satellite Signals
After you turn on the GPSMAP 378/478, the unit automatically
begins searching for satellites. The GPS Page appears while the unit
is gathering satellite signals and acquiring a x, which should take
only a few minutes. While the GPSMAP 378/478 is getting satellite
signals, the GPS Page shows the status as “Acquiring Satellites.”
GPS Tab
NOTE: While acquiring satellites, the Map Page might show
the wrong location, such as China. You need to wait a few more
minutes to acquire satellites and nd your current location.
Viewing GPS Status with the GPS Tab
The GPS tab provides a visual reference of satellite acquisition,
receiver status, and accuracy. The sky view and signal strength bars
show what satellites are visible to the receiver and whether they are
being tracked.
As the receiver locks onto satellites, a signal strength bar appears
for each satellite in view, with the appropriate satellite number
underneath each bar. The numbers below each bar represent the
particular satellite that is being received. Numbers above 33 indicate
WAAS satellites.
The sky view shows a bird’s eye view of the position of each
satellite relative to the receiver’s last known position. The outer
circle represents the horizon (north up), the inner circle represents
45º above the horizon, and the center point represents a position
directly overhead. You can also set the sky view to a Track Up
conguration, causing the top of the sky view to align along your
current track heading. Press MENU to change the conguration of
the sky view.
GPS Page
Receiver
status eld
Sky view
Signal
strength bars
Power
source
indicator
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The progress of satellite acquisition is shown in three stages:
• No signal strength bars—the receiver is looking for the
satellites indicated.
• White signal strength bars—the receiver has found the
satellite and is collecting data.
• Green signal strength bars—the receiver has collected the
necessary data from this satellite.
When the GPSMAP 378/478 collects the necessary data from the
best satellites in view to calculate a x, the status eld indicates the
status of the receiver. The unit then updates the location, date and
time.
Receiver Status
The Receiver Status eld shows one of the following conditions:
• Searching the Sky—the receiver is looking for satellites.
• AutoLocate—the receiver is looking for any satellite whose
almanac was collected, which can take up to ve minutes.
• Acquiring Satellites—the receiver is looking for and
collecting data from satellites visible at its last known or
initialized location but has not acquired a x.
• 2D GPS Location—At least three satellites were acquired
and a two-dimensional position x was calculated.
“2D Differential” appears when you are receiving DGPS
corrections in 2D mode, and a “D” appears on the strength bar
of satellites being corrected.
• 3D GPS Location—At least four satellites were acquired
and a three-dimensional x was calculated. “3D Differential”
appears when you are receiving DGPS corrections in
3D mode, and a “D” appears on the strength bar of satellites
being corrected.
• Lost Satellite Reception—the receiver is no longer tracking
enough satellites for a 2D or 3D x.
• Receiver Not Usable—the receiver is unusable, possibly due
to interference or abnormal satellite conditions. Turn the unit
off and back on to reset it.
•Simulating GPS—the receiver is in Simulator Mode.
• GPS Off—the GPS receiver is turned off.
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GPS Options
Press MENU twice to open the Main Menu. Use the ROCKER to
highlight the GPS tab. Press MENU to open the options menu.
Start/Stop Simulator—starts and stops Simulator Mode, which is
helpful when learning how to use your unit.
Enable/Disable WAAS—enables or disables WAAS capability. See
page 124 of the “Appendix” for more information about WAAS.
Track Up Skyview/North Up Skyview—orients the sky view
display on the GPS Page to North up or Track up.
New Altitude—allows you to manually enter your altitude.
New Location—allows you to enter a new location automatically or
using the map.
GPS Tips
While the receiver is gathering information, your location on the
map might appear different from where you are actually located.
As soon as the receiver gathers enough satellite information, your
proper location appears on the map.
Any time you have traveled more than 600 miles with the GPS
receiver turned off, the receiver might take longer than normal to
initialize and nd your location.
The GPS receiver can lose satellite signals due to interference from
such items as buildings, tunnels, and heavy tree cover. Monitoring
the GPS status is recommended.
To learn about GPS, visit www.garmin.com/aboutGPS/.
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Using the GPSMAP 378/478 Keypad
.IN Key/OUT Key
• Press to adjust map scale to show a larger area with
less detail (zoom out) or a smaller area with more
detail (zoom in).
PAGE/MODE Key
• Press to cycle through main pages in sequence and
exit a submenu page.
• Press and hold to switch between Marine and
Automotive Modes.
QUIT Key
• Press to cycle through main pages in reverse
sequence, revert to the previous value in a data
entry eld, or cancel an unintended function.
ENTER/MARK Key
• Press to select a highlighted option.
• Press and hold to mark your current location as a
waypoint.
NAV/MOB Key
• Press to show the Navigate Menu.
• In Marine Mode, press and hold to start the MOB
function.
In Automotive Mode, press and hold to show the
Next Turn page and announce the next turn when
using the external speaker.
MENU/Wx Key
• Press to open the options menu for the current page.
• Press twice to show the Main Menu.
• Press and hold to toggle XM WX weather on or off
on the Map Page.
POWER Key
• Press and hold to turn the unit on or off.
• Press and release to adjust the backlighting and
external speaker volume.
ROCKER
• Press up, down, left, or right to highlight options
and to enter data, or use to pan the arrow on the
Map Page.
FIND Key
• Press to quickly search for and access user
waypoints, cities, and other items used for
navigation.
GPSMAP 378/478 Owner’s Manual 7
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Using the GPSMAP 378/478
The advanced keypad system on the GSPMAP 378/478 is
designed to allow you to select options and enter data quickly and
conveniently. As you progress through this owner’s manual, you
are directed to press a specic key or highlight a eld on the screen.
When you are directed to press a key, you should press and quickly
release the key. If the key needs to be held down for a period of time
to start a secondary function, the instructions will tell you to do so.
When a eld is selected on the screen, it is highlighted in yellow.
The following terms are used throughout this manual:
• Highlight—move the highlighted area on the screen up,
down, left, or right with the ROCKER to select individual
elds. Moving the highlight to a given location allows you to
make a selection, begin data entry, or scroll through a list.
• Field—the location on a page where data or an option can
be shown and entered. Select (highlight) a eld using the
ROCKER to begin entering data or selecting options.
• On-screen button—use the ROCKER to highlight a button
and press ENTER to select the button.
• Scroll bar—when viewing a list of items too long to appear
on the screen, a scroll bar appears along the right side of
the list. To scroll through a list, press up or down on the
ROCKER.
• Default—the factory setting saved in the unit’s memory. You
can change the settings, and you can also revert to the factory
(default) settings when you select Restore Defaults.
Highlighted eld
Field
On-screen buttons
Cartography
The GPSMAP 378 system contains preloaded U.S. inland freshwater
cartography to its enhanced worldwide basemap information.
The preloaded inland maps offer 50-meter shoreline resolution
throughout the US, with even more detailed 10-meter resolution on
select lakes. Other details include depth contours, tide and current
data, boat ramps, mile markers, hazards, marinas, campgrounds, area
roads, and more.
The GPSMAP 478 system contains preloaded marine map detail
utilizing BlueChart
®
g2 technology. Coverage is for US coastal
areas.
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Selecting Options and Entering Data
To enter data and select options use the ROCKER to highlight,
select, or choose an item in a list or a eld on the screen. Use the
ENTER key and the ROCKER to select options, enter names and
numbers in data elds, and activate your selections.
To select and activate an option:
1. From any page, press MENU. An options menu shows a list
of optional features to that page.
2. Use the ROCKER to move the highlight up, down, right, or
left on the menu to the option you want to select.
3. Press ENTER to select the feature. Another window with
more options might appear. If so, select an option and press
ENTER again.
To exit a menu or return to the previous setting:
Press QUIT. The QUIT key moves backward through your
steps. Press QUIT repeatedly to return to the starting page.
To select an on-screen button:
On a page with on-screen buttons, use the ROCKER to
highlight an on-screen button, and press ENTER.
On-screen
button
To mark your current location as a waypoint, press and hold
ENTER/MARK until the New Waypoint Page opens.
To enter data in a data eld:
1. Use the ROCKER to highlight the data eld you want, and
press ENTER to edit it.
2. Press up or down on the ROCKER to select characters.
Press right to move to the next character or press left to
move back to the previous character. If there are two lines of
data, keep pressing right on the ROCKER to drop to the next
line.
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Entering
data
TIP: To clear the entire data eld, highlight the left-most
character eld and press left on the ROCKER again.
3. Press ENTER.
Not all elds are programmable. When you are on a page with elds
that are not selectable, the highlight skips over them.
Restoring Default Settings
You can restore factory defaults for the following Main Menu tabs:
Track, Alarms, Display, Sound, and Setup. For more information
about the Main Menu, see the “Main Menu” section beginning on
page 67.
To restore default settings:
1. Press MENU twice to open the Main Menu.
2. Use the ROCKER to highlight a tab, and then press MENU to
open the options menu.
Setup Tab Options Menu
3. Highlight Restore Default, and press ENTER.
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Using the Main Menu
Use the Main Menu on your GPSMAP 378/478 to access various
waypoint, system, navigation and interface management, and setup
menus. Press the MENU key twice from any page to open the Main
Menu. For more information, see the “Main Menu” section on
page 67.
Main Menu
To select a tab from the Main Menu:
1. From any page, press MENU twice to open the Main Menu.
2. Press up or down on the ROCKER to highlight a tab. The
information for the highlighted tab automatically appears
on the right. To highlight a sub tab, press left or right on the
ROCKER, and then press up and down to select individual
elds.
By default, the Main Menu tabs are shown as icons along the left
side of the screen. You can change the Main Menu to show tabs in a
text-only format.
To view the Main Menu icons in text-only format:
1. Highlight the Display tab, and press ENTER.
2. Select the Main Menu eld. Press ENTER.
3. Highlight Text Only, and press ENTER.
Display Tab
GPSMAP 378/478 Owner’s Manual 11
gettIng stArted > usIng the gPsMAP 378/478

Using Simulator Mode
Simulator Mode is great for practicing with the unit if you are
indoors or when satellite signals are not available. All waypoints and
routes created in Simulator Mode are retained in memory for future
use.
By unplugging the GXM 30 antenna and placing the unit in
Simulator Mode, you can view simulated weather information.
NOTE: Do not try to navigate using Simulator Mode. When the
unit is set to Simulator Mode, the GPS receiver is turned off.
Any satellite signal strength bars shown are only simulations and
do not represent the strength of actual satellite signals.
To turn on Simulator Mode:
1. Highlight the GPS tab on the Main Menu.
2. Press MENU to open the GPS tab options menu.
3. Highlight Start Simulator, and press ENTER.
GPS tab
Starting Simulator Mode from the GPS tab
Entering a New Location
Use the GPS options menu to enter a new location from which to
simulate.
To enter a New Location using the map:
1. Highlight the GPS tab on the Main Menu.
2. Press MENU to open the options menu.
3. Highlight New Location,and press ENTER.
4. Highlight Use Map,and press ENTER.
5. Use the ROCKER to move the panning arrow to the location
you want on the map, and press ENTER.
12 GPSMAP 378/478 Owner’s Manual
gettIng stArted > usIng sIMulAtor Mode