Garmin 188, 238 User Manual

GPSMAP 188/188C/238 Sounder

chartplotting receiver & depth-ﬁ nder

owner’s manual and reference

(GPSMAP 188C Shown)

guide

Garmin International, Inc. 1200 East 151st Street, Olathe, KS 66062, U.S.A. Tel. 913/397.8200 or 800/800.1020 Fax 913/397.8282

Garmin (Europe) Ltd. Unit 5, The Quadrangle, Abbey Park Industrial Estate, Romsey SO51 9DL, U.K. Tel. 44/1794.519944 Fax 44/1794.519222

Garmin Corporation No. 68, Jangshu 2nd Road, Shijr, Taipei County, Taiwan Tel. 886/2.2642.9199 Fax 886/2.2642.9099

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 prior written consent of Garmin. Garmin hereby grants permission to download a single copy of this manual and of any revision of this manual onto a hard drive or other electronic storage medium to be viewed and to print one copy of this manual or any revision hereto, provided that such electronic or printed copy of this manual or revision 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 manual 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. 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®, AutoLocate®, GPSMAP®, See-Thru®, DCG (Depth Control Gain)®, MapSource®, BlueChart®, and TracBack® are registered trademarks of Garmin Ltd. or its subsidiaries and may not be used without the express permission of Garmin.

June 2003 Part Number 190-00216-10 Rev. A Printed in Taiwan

Preface

Congratulations on choosing one of the most advanced marine navigation systems available! The Garmin GPSMAP tured mapping to create an unsurpassed marine navigation chartplotters.

This manual covers instructions for the GPSMAP 188, GPSMAP 188C (color), and GPSMAP 232.

Unit operation and speciﬁ cations will be the same on all three models, unless otherwise speciﬁ ed. To get the most out of your new navigation system, take the time to go through this owner’s manual

and learn the operating procedures for your unit. This manual is broken down into two parts for your convenience.

Part One introduces you to the GPSMAP 188/188C/238 Sounder and provides a Getting Started tour so that you may become more familiar with the unit. This section will provide you with a basic working knowledge necessary to use the unit to its fullest potential.

Part Two is divided into sections that provide detailed references to the advanced features and operations of the GPSMAP 188/188C/238 Sounder. This allows you to concentrate on a speciﬁ c topic quickly

and look up detailed information about the GPSMAP 188/188C/238 Sounder.

Customer Service Product Registration

Help us better support you by completing our on-line registration today!

Have the serial number of your GPSMAP 188/188C/238 handy and connect to our web site (www.garmin.com). Look for the Product Registration link on the Home page. Also, be sure to record your serial number in the area provided on page iv of this manual.

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188/188C/238 Sounders utilize the proven performance of Garmin GPS and full fea-

NOTE: If you have previously registered a Garmin product purchase, we invite you to re-register using our NEW on-line system. Many services provided by our new product registration system are now being automated and re-registering your purchase ensures you the best possible support from Garmin.

Introduction

Preface and

Registration

Introduction

FCC Compliance

The GPSMAP 188/188C/238 Sounder complies with Part 15 of the FCC interference limits for Class B digital devices FOR HOME OR OFFICE USE. These limits are designed to provide more reasonable protection against harmful interference in a residential installation, and are more stringent than “outdoor” requirements.

Operation of this device is subject to the following conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and the receiver.

• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

• Consult the dealer or and experienced radio/TV technician for help.

The GPS 188C Sounder does not contain any user-serviceable parts. Repairs should only be made by an authorized Garmin service center. Unauthorized repairs or modiﬁ cations could result in permanent damage to the equipment, and void your warranty and your authority to operated this device under Part 15 regulations.

The GPS system is operated by the United States government, which is solely responsible for its accuracy and maintenance. The system is subject to changes which could affect the accuracy and performance of all GPS equipment. Although the Garmin GPSMAP 188/188C/238 is a precision electronic NAVigation AID (NAVAID), any NAVAID can be misused or misinterpreted and, therefore, become unsafe.

Introduction

Warnings and Cautions

The electronic chart is an aid to navigation and is designed to facilitate the use of authorized government charts, not replace them. Only ofﬁ cial government charts and notices to mariners contain all information needed for safe navigation – and, as always, the user is responsible for their prudent use.

Use the GPSMAP 188/188C/238 at your own risk. To reduce the risk of unsafe operation, carefully review and understand all aspects of this Owner’s Manual—and thoroughly practice operation using the simulator mode prior to actual use. When in actual use, carefully compare indications from the GPSMAP 188/188C/238 to all available navigation sources, including the information from other NAVAIDs, visual sightings, charts, etc. For

safety, always resolve any discrepancies before continuing navigation.

FCC Compliance

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 (as required) in product literature and copyright messages displayed to the consumer. Virtually all data sources contain inaccurate or incomplete data to some degree. This is particularly true outside the United States, where complete and accurate digital data is either not available or prohibitively expensive.

The GPSMAP 188/188C/238 complies with Part 15 of the FCC interference limits for Class B digital devices FOR HOME OR OFFICE USE. These limits are designed to provide reasonable protection against harmful interference in a residential installation, and are more stringent than “outdoor” requirements. Operation of this device is subject to the following conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee

CAUTION: IT IS THE USER’S RESPONSIBILITY TO USE THIS PRODUCT PRUDENTLY. THIS PRODUCT IS INTENDED TO BE USED ONLY AS A NAVIGATIONAL AID AND MUST NOT BE USED FOR ANY PURPOSE REQUIRING PRECISE MEASUREMENT OF DIRECTION, DISTANCE, LOCATION, OR TOPOGRAPHY.

that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/TV technician for help.

The GPSMAP 188/188C/238 does not contain any user-serviceable parts. Repairs should only be made by an authorized Garmin service center. Unauthorized repairs or modiﬁ cations could result in permanent damage

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 being provided in accordance with California’s Proposition 65. If you have any questions or would like additional information, please refer to our web site at http: //www.garmin.com/prop65.

to the equipment, and void your warranty and your authority to operate this device under Part 15 regulations.

iii

Introduction

Warranty and

Serial Number

Use this area to record the serial number (8-digit number located on the back of the unit) in case it is lost, stolen, or needs service. Be sure to keep your original sales receipt in a safe place or attach a photocopy inside the manual.

Serial Number:

The GPSMAP 188/188C/238 Sounder is fastened shut with screws. Any attempt to open the case to change or modify the unit in any way will void your warranty and may result in permanent damage to the equipment.

LIMITED WARRANTY

This Garmin product is warranted to be free from defects in materials or workmanship for one year from the date of purchase. Within this period, Garmin will at its sole option, repair or replace any components that fail in normal use. Such repairs or replacement will be made at no charge to the customer for parts or labor, provided that the customer shall be responsible for any transportation cost. This warranty does not cover failures due to abuse, misuse, accident or unauthorized alteration or repairs.

THE WARRANTIES AND REMEDIES CONTAINED HEREIN ARE EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES EXPRESS OR IMPLIED OR STATUTORY, INCLUDING ANY LIABILITY ARISING UNDER ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, STATUTORY OR OTHERWISE. THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, WHICH MAY VARY FROM STATE TO STATE.

IN NO EVENT SHALL GARMIN BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, WHETHER RESULTING FROM THE USE, MISUSE, OR INABILITY TO USE THIS PRODUCT OR FROM DEFECTS IN THE PRODUCT. Some states do not allow the exclusion of incidental or consequential damages, so the above limitations may not apply to you.

Garmin retains the exclusive right to repair or replace the unit or software or offer a full refund of the purchase price at its sole discretion. SUCH REMEDY SHALL BE YOUR SOLE AND EXCLUSIVE REMEDY FOR ANY BREACH OF WARRANTY.

To obtain warranty service, contact your local Garmin authorized dealer. Or call Garmin Customer Service at one of the numbers shown below, for shipping instructions and an RMA tracking number. The unit should be securely packed with the tracking number clearly written on the outside of the package. The unit should then be sent, freight charges prepaid, to any Garmin warranty service station. A copy of the original sales receipt is required as the proof of purchase for warranty repairs.

Products sold through online auctions are not eligible for rebates or other special offers from Garmin. Online auction conﬁ rmations are not accepted for warranty veriﬁ cation. To obtain warranty service, an original or copy of the sales receipt from the original retailer is required. Garmin will not replace missing components from any package purchased through an online auction. Garmin International, Inc. Garmin (Europe) Ltd. 1200 East 151st Street Unit 4, The Quadrangle, Abbey Park Industrial Estate Olathe, Kansas 66062, U.S.A. Romsey, SO51 9DL, U.K. Phone: 913/397.8200 Phone: 44/1794.519944 USA Only: 800/800.1020 FAX: 44/1794.519222 FAX: 913/397.0836

Software License Agreement

BY USING THE GPSMAP 188/188C/238, YOU AGREE TO BE BOUND BY THE TERMS AND CONDITIONS OF THE FOLLOWING SOFTWARE LICENSE AGREEMENT. PLEASE READ THIS AGREEMENT CAREFULLY.

Garmin grants you a limited license to use the software embedded in this device (the “Software”) in binary executable form in the normal operation of the product. Title, ownership rights and intellectual property rights in and to the Software remain in Garmin.

You acknowledge that the Software is the property of Garmin and is protected under the United States of America copyright laws and international copyright treaties. You further acknowledge that the structure, organization and code of the Software are valuable trade secrets of Garmin and that the Software in source code form remains a valuable trade secret of Garmin. You agree not to decompile, disassemble, modify, reverse assemble, reverse engineer or reduce to human readable form the Software or any part thereof or create any derivative works based on the Software. You agree not to export or re-export the Software to any country in violation of the export control laws of the United States of America.

Introduction

Software License Agreement

Introduction

the following items. If any parts are missing, please contact your Garmin dealer immediately.

Packing List

GPSMAP 188/188C/238 Sounder

Standard and Optional Transducers

Unit part numbers 010-00268-01, 010-00239-02, 01000239-03, and 010-00250-11 include a 200/50kHz, 10/40 degree, plastic, depth and temp, transom mount transducer. For a complete list of optional transducers, see page 96.

For the most recent list of available accessories for

your GPS unit, current user manuals and software

updates, visit our web site at www.garmin.com.

Before installing and getting started with your unit, please check to see that your package includes

Standard Package:

• GPSMAP 188/188C/238 Sounder Unit

• GA 29 External Antenna and 30’ cable

• Gimbal Mount and Knobs

• Power/Data Cable

• Owner’s Manual

• Quick Reference Card

• Protective Cover

Optional Accessories:

• US A/C PC Adapter

• EURO A/C PC Adapter

• Cigarette Lighter Adapter

• BlueChart Marine Data Cards, MapSource CDs, USB Data Card Programmer and Data Cards

• USB Data Card Programmer

• GBR21 Beacon Receiver for differential corrections; GA 22 H-Field Antenna

• 2nd Mounting Station

• Marine Swivel Mount, 1” RAM

Mount (GPSMAP 188 with external antenna only)

Designed for detailed electronic charting capability, the Garmin GPSMAP 188/188C/238 Sounder is

a powerful navigation device that can give you the information you need:

Precision Performance

• 188C: High-contrast, 16-color LCD screen with backlighting; 188/238: High-contrast, ten-level gray, LCD screen with backlighting

• 12-channel parallel receiver tracks and uses up to 12 satellites for fast, accurate positioning

• WAAS Capable — receive signals from the additional set of WAAS (Wide Area Augmentation System) satellites to give you better accuracy

• Differential-Ready — just add an optional Garmin beacon receiver for better than 5-meter accuracy

• Fully gasketed, high-impact plastic alloy case, waterproof to IEC 529 IPX7

Advanced Navigating and Plotting

• 3000 alphanumeric waypoints with selectable icons and comments

• Built-in Worldwide marine basemap to 20 miles includes detailed ocean, river and lake coastlines, cities, interstates, US state highways, and local thoroughfares

• 50 reversible routes with up to 254 (188C; 50 on 188/238) waypoints each

• Uploadable maps using Garmin’s MapSource™ PC products and BlueChart™ Data Cards

• Coordinates: Lat/Lon, UTM/UPS, Loran TD, plus over 20 grids, including Maidenhead

• TracBack route feature which allows you to quickly retrace your track log to a starting position

• Built-in simulator mode

• Built-in tide information from over 3,000 tide stations around the USA coastline, Alaska, Hawaii, western Canada and several Caribbean Islands

Superior Fishﬁ nding Ability

• Whiteline feature provides a clear image of both bottom hardness and structure

• See-Thru

technology which helps separate ﬁ sh returns from thermoclines and structure

• Four zoom levels with a moving view window

• Underwater waypoint marking

• Map/Sonar split screen combines navigation and ﬁ shﬁ nding information

• Fish and depth alarms

Introduction

Capabilities

vii

Introduction

Table of Contents

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . i-viii

Preface and Registration . . . . . . . . . . . . . . . . . . i

FCC Compliance . . . . . . . . . . . . . . . . . . . . . . .ii

Warnings and Cautions . . . . . . . . . . . . . . . . . iii

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv

Software License Agreement . . . . . . . . . . . . . . . v

Packing List . . . . . . . . . . . . . . . . . . . . . . . . . . vi

Capabilities . . . . . . . . . . . . . . . . . . . . . . . . . . vii

Table of Contents . . . . . . . . . . . . . . . . . . . . . viii

Section One: Getting Started . . . . . . . . . . . . 1-21

Keypad Usage . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Initializing the Receiver . . . . . . . . . . . . . . . . . .2

Selecting Options & Entering Data . . . . . . . . . . 4

Backlighting . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Simulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Map Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Going to a Destination . . . . . . . . . . . . . . . . . .11

Sonar Page . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Compass Page . . . . . . . . . . . . . . . . . . . . . . . .16

Numbers Page . . . . . . . . . . . . . . . . . . . . . . . . 16

Highway Page . . . . . . . . . . . . . . . . . . . . . . . . .17

viii

Active Route Page . . . . . . . . . . . . . . . . . . . . . .19

Main Menu Page . . . . . . . . . . . . . . . . . . . . . . .20

Section Two: Reference . . . . . . . . . . . . . . . . 22-77

Map Page . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Using the Cursor . . . . . . . . . . . . . . . . . . .22

Selecting Map Scales . . . . . . . . . . . . . . . . .24

Map Page Options . . . . . . . . . . . . . . . . . .25

Sonar Page . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Using the Adjustment Menu . . . . . . . . . . .33

Sonar Page Options . . . . . . . . . . . . . . . . .36

Compass Page . . . . . . . . . . . . . . . . . . . . . . . .41

Numbers Page . . . . . . . . . . . . . . . . . . . . . . . . 42

Highway Page . . . . . . . . . . . . . . . . . . . . . . . . .42

Waypoints . . . . . . . . . . . . . . . . . . . . . . . . . . .44

Creating . . . . . . . . . . . . . . . . . . . . . . . . . .44

Reviewing and Editing . . . . . . . . . . . . . . .48

Going to a Destination . . . . . . . . . . . . . . . . . .53

Go To . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

TracBack . . . . . . . . . . . . . . . . . . . . . . . . . .54

MOB Key . . . . . . . . . . . . . . . . . . . . . . . . . . . .56

Routes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Creating . . . . . . . . . . . . . . . . . . . . . . . . . .57

Following . . . . . . . . . . . . . . . . . . . . . . . . .58

Route List Page . . . . . . . . . . . . . . . . . . . . .59

Route Review Page . . . . . . . . . . . . . . . . . .60

Active Route Page . . . . . . . . . . . . . . . . . . . . . .64

Find Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Main Menu Page . . . . . . . . . . . . . . . . . . . . . . .67

GPS Tab . . . . . . . . . . . . . . . . . . . . . . . . . .68

Tide Tab . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Trip Tab . . . . . . . . . . . . . . . . . . . . . . . . . .74

Celestial Tab . . . . . . . . . . . . . . . . . . . . . . .74

Track Tab . . . . . . . . . . . . . . . . . . . . . . . . .75

DSC Tab . . . . . . . . . . . . . . . . . . . . . . . . . .77

Card Tab . . . . . . . . . . . . . . . . . . . . . . . . . .82

Time Tab . . . . . . . . . . . . . . . . . . . . . . . . .82

Pages Tab . . . . . . . . . . . . . . . . . . . . . . . . .83

Temp Tab . . . . . . . . . . . . . . . . . . . . . . . . .84

System Tab . . . . . . . . . . . . . . . . . . . . . . . . 84

Units Tab . . . . . . . . . . . . . . . . . . . . . . . . .85

Communication Tab . . . . . . . . . . . . . . . . . 87

Alarm Tab . . . . . . . . . . . . . . . . . . . . . . . . . 90

Appendices . . . . . . . . . . . . . . . . . . . . . . . . 92-121

Appendix A: Installation . . . . . . . . . . . . . . . . . 92

Appendix B: Data Cards . . . . . . . . . . . . . . . .100

Appendix C: Maintenance . . . . . . . . . . . . . .101

Appendix D: Loran TD . . . . . . . . . . . . . . . . .102

Appendix E: Map Datum . . . . . . . . . . . . . . . 104

Appendix F: Messages . . . . . . . . . . . . . . . . .106

Appendix G: Navigation Terms . . . . . . . . . . .108

Appendix H: Time Offsets . . . . . . . . . . . . . .110

Appendix I: Understanding Sonar . . . . . . . .111

Appendix J: Speciﬁ cations . . . . . . . . . . . . . .116

Appendix K: Index . . . . . . . . . . . . . . . . . . . .118

Using the Keypad

ZOOM IN Key— adjusts the map scale to display a smaller area with more detail (Zooms in).

ZOOM OUT Key— adjusts the map scale to display a larger area with less detail (Zooms out).

Getting Started

Keypad Usage

NAV Key— displays the Go To and Follow navigation menu.

PAGE Key— selects the main pages in sequence and returns display from a submenu page.

QUIT Key— returns the display to the previous page and, when entering data, it restores the previous

value (cancels data entry).

MENU Key— displays a menu of available options for the current page. Press twice to display the Main Menu.

ARROW KEYPAD— used to select (Highlight) menu options and enter data. It also controls cursor movement on the Map Page.

FIND Key— activates the ﬁ nd function to search for nearby items and user waypoints.

ENTER/MARK Key— selects a highlighted menu option. When entering data, it allows you to initiate

entry, and then to accept the selected value(s). It also marks the current location as a waypoint when pressed and held for more than one second.

MOB (Man OverBoard) Key— activates the Man OverBoard navigation feature when pressed.

POWER/BACKLIGHT/CONTRAST Key— turns the unit on/off and adjusts display illumination.

Also controls Contrast on monochrome units.

)

NOTE: Always press and release a key to perform its primary function. Pressing and holding the ENTER/MARK key will activate its secondary function.

ZOOM

NAV

QUIT

FIND

ZOOM

OUT

PAG E

ENTER

MARK

MOB

Getting Started

Initializing the Receiver/

Power On

GPSMAP 188/188C/238 Sounder Warning Screen

The GPSMAP 188/188C/238 Sounder’s advanced keypad system is designed to allow for fast, convenient selection of navigation options and data entry. The Getting Started Tour will introduce you to the keypad and provide a ‘hands-on’ lesson in using the GPSMAP 188/188C/238 Sounder. We strongly encourage you to follow the Getting Started tour before using your unit for actual navigation.

The GPSMAP 188/188C/238 Sounder Quick Reference Guide contains helpful tips on using the unit and performing various navigation tasks. It’s a good idea to keep the Quick Reference Guide nearby whenever you’re operating your GPSMAP 188/188C/238 Sounder.

Initializing the Receiver

The ﬁ rst time you power up your GPSMAP 188/188C/238 Sounder, the receiver must be given an opportunity to collect satellite data and establish its present position. To ensure proper initialization, the GPSMAP 188/188C/238 Sounder is shipped from the factory in AutoLocate mode, which allows the receiver to “ﬁ nd itself” anywhere in the world. To speed up the initialization process, we recommend using the graphic initialization process described on the next page, which usually provides a position ﬁ x within a few minutes.

Before you initialize, make sure the GPSMAP 188/188C/238 Sounder unit and antenna have been correctly installed on your vessel according to the instructions in Appendix A. The antenna needs to be in a location with a clear and unobstructed view of the sky to receive satellite signals.

To turn on the GPSMAP 188/188C/238 Sounder:

1. Press and hold the POWER key until the power tone sounds and the display comes on, then release the POWER key. A warning page appears, asking you to read and acknowledge important information regarding the use of the unit.

2. After reading the warning, press ENTER to agree and move to the next display.

To graphically initialize the GPSMAP 188/188C/238 Sounder:

1. Press the MENU key twice for the Main Menu. Press Up or Down on the ARROW KEYPAD until the ‘GPS’ tab is highlighted, then press the MENU key once.

2. Using the ARROW KEYPAD, highlight ‘Initialize Position’ and press ENTER to initialize the receiver from the map. The Initialize Position Page appears, prompting you to select your approximate location with the map cursor.

3. Use the ARROW KEYPAD to move the map cursor and point to your approximate location within 200 miles. If you have difﬁ culty identifying your position, press and release the IN key to see the next lower map scale.

4. Once you have determined your approximate location on the map, press the ENTER key.

NOTE: This does not “calibrate” the unit in any way, but rather helps to speed up the initial satellite acquisition. If the unit displays “Ready (2D) or (3D )” during this process, it is not necessary to initialize the unit.

The GPSMAP 188/188C/238 Sounder will now begin searching for the appropriate satellites for your region and should acquire a ﬁ x within a few minutes. When viewing the ‘GPS’ tab on the Main Menu, a signal strength bar for each satellite in view appears on the bottom of the page, with the appropriate satellite number under each bar. The progress of satellite acquisition is shown in three stages:

• No signal strength bars— the receiver is looking for the satellites indicated.

• Hollow signal strength bars— the receiver has found the indicated satellites and is collecting data.

• Solid signal strength bars— the receiver has collected the necessary data and the satellites are ready for use.

Once the receiver has collected information from at least three satellites, the top of the screen

displays either “Ready (2D or 3D)”, and the GPSMAP 188/188C/238 Sounder is ready for use.

Getting Started

Initializing the Receiver

Point to your approximate location and press ENTER/MARK.

A satellite’s strength bars turn green when it’s ready for use.

Getting Started

Selecting Options

Options Menu with highlighted option.

Use the ARROW KEYPAD to highlight the next option. Press ENTER/MARK to activate.

Selecting Options and Entering Data

Before moving ahead into the features of the GPSMAP 188/188C/238 Sounder, you will need to learn basic operations. You can select and activate options and enter data to customize the GPSMAP 188/188C/238 Sounder to ﬁ t your requirements. You can use the ENTER/MARK key and ARROW KEYPAD to select options, enter names and numbers in data ﬁ elds, and activate your selections.

To select and activate an optional feature:

1. With any page displayed, press the MENU key to pop-up the options menu. The options menu displasy a list of optional features which are speciﬁ c for that particular page. To select any feature on the list of options requires movement of the cursor, which is identiﬁ ed as highlighting, selecting or choosing an item in a list or a ﬁ eld (box) on a page.

2. Use the ARROW KEYPAD to move the cursor (highlight) up and down a list or up, down, and sideways on menus.

3. Once you have moved to the selection desired, press the ENTER key to either activate the feature or the MENU key to pop-up a sub-menu or list of yet more feature options. Just repeat this process to select an option from the list or press the QUIT key to return to the previous setting.

The QUIT key will move backwards through these steps or when pressed, back to the main page

you started on.

To select and activate a function button:

1. When moving about a page with function buttons, like the ‘New Map Waypoint’ page, you will observe functions such as ‘Delete’, ‘Show Map’ and ’OK’. To activate the function, highlight the desired button and press the ENTER key.

Pop-up list of options for a highlighted ﬁ eld.

Naming a waypoint or placing any sort of data that has not been predeﬁ ned requires the use of

both the ARROW KEYPAD and the ENTER/MARK key.

To enter a name or number in a data ﬁ eld:

1. Once you have accessed a page with programmable data ﬁ elds (i.e. ‘ Waypoint Edit’) you can use the ARROW KEYPAD to move the cursor (Highlight) to ﬁ elds on the page. Use the UP/DOWN arrows to move up or down and the LEFT/RIGHT arrows to move sideways.

2. Pressing the ENTER key with the ﬁ eld highlighted begins the process for entering data in the form of alphanumeric characters.

3. Use the ARROW KEYPAD UP/DOWN arrows to cycle through numbers 0 to 9, plus/minus symbols, blank space, and the alphabet. Pressing and releasing the keypad moves you character by character through the list. Pressing and holding the keypad moves you rapidly through the list.

4. Use the ARROW KEYPAD LEFT/RIGHT arrows to move to the next character on the line or backwards to edit characters. If there are more than two lines of data, keep pressing to the RIGHT to drop down to the next line.

5. When data entry is completed press ENTER to accept data, then move to the next programmable ﬁ eld. Not all data ﬁ elds are programmable, like the date and time. When moving about a page with these type of ﬁ elds, the cursor will skip over them.

Every ﬁ eld and button on this page can be programmed or activated.

A waypoint symbol can be selected from a list of symbols.

The waypoint can be renamed.

A depth can be entered.

Getting Started

Entering Data

Pressing UP or DOWN on the ARROW KEYPAD changes numbers and letters.

Pressing LEFT or RIGHT on the ARROW KEYPAD moves the cursor along the line or to the next line.

Data Entry Field

Non-programable data ﬁ elds

A comment can be added.

The coordinates can be changed.

Option buttons can be activated.

Getting Started

Tour/Backlighting

A full-screen GPS Information pop-up page is displayed after you press the ENTER key to acknowledge the Warning Page. The pop-up page will go away after the unit gets a position ﬁ x or you press either ENTER or QUIT. The page can be disabled and enabled on the Pages Tab (see page 83).

GPSMAP 188/188C/238 Sounder Getting Started Tour

The Garmin GPSMAP 188/188C/238 Sounder is a powerful electronic navigation system that provides detailed map coverage and convenient control of many advanced features right from the screen display. This tour is designed to take you through the basic pages and functions of the system using the simulator mode. Once you’re familiar with the main pages and functions of the unit, refer to the reference section for instructions on performing speciﬁ c tasks and functions.

The Getting Started Tour assumes that the receiver has been properly installed and initialized, and you have not changed any of the default unit settings. If you have changed any settings (position formats, units of measure, etc.), the descriptions and pictures in the tour may not match your conﬁ guration.

After powering on the GPSMAP 188/188C/238 Sounder, the GPS Information Page appears as the receiver begins acquiring satellites. From this or any other page, you may also adjust the backlighting.

The GPSMAP 188/188C/238 Sounder’s adjustable screen backlighting is controlled with the POWER key, and may be adjusted at any time from any page. The backlight can cycle through off, user-deﬁ ned, and maximum backlight levels by repeatedly pressing the POWER key.

To turn on and adjust the backlighting:

1. Press POWER and the Light window appears.

2. Press POWER again and the user-deﬁ ned level of backlighting activates. You may adjust this level by pressing UP or DOWN on the ARROW KEYPAD. If you press POWER one more time, the back- lighting will be at the maximum setting.

3. Press ENTER or QUIT when done.

The backlight will now cycle through off, the user-deﬁ ned, and maximum backlight levels by

repeatedly pressing the POWER key.

You may also adjust the screen contrast (GPSMAP 188/238 monochrome only).

To adjust the screen contrast:

1. Press POWER and the Light and Contrast window appears.

2. To decrease or increase the screen contrast, press left or right on the ARROW KEYPAD.

3. Press the ENTER/MARK key to ﬁ nish.

Each page of the GPSMAP 188/188C/238 Sounder’s system also features an options page, which gives you access to other functions and features that relate to the speciﬁ c page you are viewing. To get a feel for how the option pages work, let’s put the GPSMAP 188/188C/238 Sounder into simulator mode.

To activate the simulator mode:

1. Press the MENU key twice for the Main Menu. Press Up or Down on the ARROW KEYPAD until the ‘GPS’ tab is highlighted, then press the MENU key once.

2. Use the UP or DOWN arrow of the ARROW KEYPAD to highlight the ‘Start Simulator’ option and press ENTER. Choose ‘No’ to the retail demonstration and press the ENTER key.

3. Press the ENTER key to conﬁ rm the ‘Running Simulator’ message that appears at the bottom of the display. ‘Simulating’ appears at the top of the Main pages.

Use the ARROW KEYPAD to move the backlighting slider UP for brighter or DOWN for dimmer backlighting. Monochrome units will have an additional Contrast adjustment.

While in Simulator mode, a ‘Running Simulator’ message appears after 2 minutes of inactivity..

Now you’re ready to continue the rest of the simulated tour. Keep in mind that the GPSMAP 188/

188C/238 Sounder does not track satellites in simulator mode, and this mode should never be used for actual navigation. All the waypoint and route planning done in simulator mode is still

retained in memory for future use.

Getting Started

Simulator Mode

A “Running Simulator” message appears after 2 minutes of inactivity.

Getting Started

Main Pages/

Map Page

Main Pages

The Map Page is one of six main pages used in the GPSMAP 188/188C/238 Sounder’s system. The six main pages are the Map Page, Sonar Page, Compass Page, Numbers Page, Highway Page, and Active Route Page. All six pages are linked together in a simple chain, which allows you to scroll through the pages in either direction using the PAGE and QUIT keys.

Map Page

Sonar Page

PAG E

Compass Page

Numbers Page

Highway Page

QUIT

Active Route Page

The GPSMAP 188/188C/238 Sounder’s Map Page combines digital chartplotting with a user-selectable display of navigation data and a built-in worldwide database. It will also be the page you use most to create and edit waypoints and routes. Before we take off on our practice route, let’s take a brief look at its various features and displays.

The map display shows your “boat” as a triangle marker on an electronically generated chart. Geographic names, roads, markers and buoys that are provided by the optional BlueChart or MapSource data are also shown. It also displays your track, routes and nearby waypoints. An on-screen cursor lets you pan to other map areas, determine the range and bearing to a position, and perform various waypoint and route functions.

The data window, located at the top of the page, provides a user-selectable display of various navigation data, including speed over ground, distance to the next navigation point, compass ribbon, and

current position coordinates. The current map scale setting is located at the bottom right of the page.

Using the Map Cursor

Working from the Map Page is a simple process that centers around the use of the cursor. Controlled by the ARROW KEYPAD, the cursor is an important tool that can be used to pan to other map locations, mark and edit waypoints and routes, and review position data of on-screen map items and waypoints.

To get a feel for using the Map Page and using the cursor, try the following exercise:

1. Use the IN/OUT keys to set the map scale to the 50 nm setting. Your boat should be near the center of the map, at the receiver’s last known position. (If your boat isn’t where it should be, make sure that you have initialized the receiver and acquired a position as described on pages 4-5.)

2. Use the ARROW KEYPAD to move the cursor. Notice how another data ﬁ eld appears, showing the bearing and distance from your boat to the cursor, along with the latitude/longitude of the cursor.

3. Press the QUIT key to remove the cursor and re-center your boat on the map display.

As you become more familiar with the cursor, you’ll see that the map display actively scrolls or ‘pans’, letting you explore areas around the world and create waypoints and routes. Wherever you move the cursor, you’ll always be just one QUIT keystroke away from returning the map to your present position.

Now that you’ve seen how the Map Page can be used to monitor your present location, let’s take a minute to learn how to mark and store your present position as a waypoint. Since you’re in simulator mode, the present position displayed will be the last position calculated by the receiver, which should be the spot where you’ve initialized the unit. This will also give you an opportunity to see how the GPSMAP 188/188C/238 Sounder’s keypad and ENTER/MARK key are used for data entry and changing the waypoint name and symbol.

Getting Started

Map Cursor

Current position

Map Scale

Distance

Bearing

Cursor Coordinates

Map Cursor

Getting Started

Marking Waypoints

You can choose from a list of useful symbols. There are two Diver Down waypoint symbols to select from: the International and U.S. versions.

Press ENTER/MARK after entering the name.

To mark your present position:

1. Hold down the ENTER/MARK key until the ‘New Waypoint’ window appears then release the key. The window will show a default three-digit waypoint name/number (001), symbol (dot), and position. You can leave the name as the auto-assigned number, but for this exercise, lets change the name to ‘DOCK’.

2. Use the ARROW KEYPAD to highlight the waypoint name ﬁ eld (001) and press ENTER/MARK. You will see that just the ﬁ rst ‘0’ is now highlighted.

3. Press LEFT on the ARROW KEYPAD to clear the name ﬁ eld.

4. Press UP or DOWN on of the ARROW KEYPAD until the letter ‘D’ appears, and then press RIGHT to go to the next space to the right, then UP or DOWN again until ‘O’ appears. Repeat this until you have entered the name ‘DOCK’. If you make a mistake and select an incorrect character, simply press LEFT on the ARROW KEYPAD to backspace the cursor and then UP or DOWN to correct the entry. (If you accidentally press ENTER/MARK before you are done, simply press ENTER/MARK again and move the highlight to where you left off.)

5. After you have entered all the letters, press ENTER/MARK to conﬁ rm the name.

6. To access the waypoint symbol page, highlight the waypoint symbol ﬁ eld, which is to the left of the waypoint’s name and press ENTER/MARK. The default symbol is a dot.

7. You will see an alphabetical list of available waypoint symbols to choose from. Press the ARROW KEYPAD UP or DOWN until you highlight the ‘ANCHOR’ symbol. You will see a scroll bar on the right of the window indicating your current position on the entire list of symbols.

8. Press ENTER/MARK to conﬁ rm the ‘ANCHOR’ symbol.

9. Highlight ‘OK’ at the bottom of the window and press ENTER/MARK again to conﬁ rm the ‘OK’ prompt and save the waypoint.

The waypoint is now stored in memory. Note that waypoints may also be created graphically from the map display or by manually entering position coordinates. Each of these techniques is described in the reference section of the manual and/or on your GPSMAP 188/188C/238 Sounder Quick Reference Guide.

Going to a Destination

GPS is all about marking positions as waypoints and navigating to them using the receiver’s steering guidance and map displays. We’ve already seen how to use the ENTER/MARK key to store your present position, so it’s time to move on to the fun part—going to a destination.

The NAV key, located on the keypad above the QUIT key, is the primary tool used to select a destination waypoint, TracBack, or a route to navigate. The NAV key can be used in two primary ways:

• Pressing NAV once displays a list of options from which you can select ‘Go To Point’, ‘Follow Route’, ‘Follow Track’, or ‘Stop Navigation’.

• Highlighting an on-screen waypoint or map item as a destination directly from the Map Page and pressing NAV allows you to graphically select points to “Go To”.

For our simulated trip, you’re going to select a pre-programmed tour route using the ﬁ rst method. This will also show how the MENU key is used throughout the GPSMAP 188/188C/238 Sounder system to provide tab style options and functions. Let’s start by changing the position to where the practice route is located.

To change the GPSMAP 188/188C/238 Sounder position in simulator mode:

1. Press the MENU key twice to display the list of Main Menu tab items.

2. Use the ARROW KEYPAD to highlight the ‘Systm’ tab.

3. Highlight ‘Set Position’ in the simulator setup window and press ENTER.

4. From the Initialize Position page, press the MENU key. With ‘Enter As Text’ highlighted, press ENTER.

5. On the Enter Position window, press ENTER then use the ARROW KEYPAD to enter N34°56.800’, W076°24.066’ and press ENTER when done, then press QUIT to return to the Map Page.

Getting Started

Using the NAV Key

Text entry for simulator position.

For future practice, you may skip steps 3 through 5 and use the ARROW KEYPAD to point to a location from the Initialize Position page.

Getting Started

Simulated Tour

The Set Position, Track Control, Track and Speed ﬁ elds will only show while in simulator mode.

Select the practice route and press ENTER/MARK.

To activate the practice route stored in memory for navigation:

1. Press NAV. A list of options appear.

2. Use the ARROW KEYPAD to highlight ‘Follow Route’ and press ENTER.

3. The Select Route page appears, with the ‘GPSMAP TOUR’ route highlighted.

4. Press ENTER, highlight ‘Activate’, and press ENTER again to activate the route.

To zoom in to a closer map scale:

1. Repeatedly press the ZOOM IN key until you select the 3 nm scale.

You may also hold the ZOOM IN or ZOOM OUT keys down to quickly scroll through the map scales. The Map Page should now display ﬁ ve waypoints chained together in a simple route, with your boat at the ﬁ rst route waypoint.

A data ﬁ eld at the top of the page now displays the speed, distance to the second route waypoint, your position coordinates and a compass ribbon which shows you which way to go. To get started, let’s enter a speed for our vessel, which we can do from the Main Menu Page.

To enter a boat speed:

1. Press the MENU key twice to display the Main Menu Page.

2. Use the ARROW KEYPAD to highlight the ‘Systm’ tab, then press RIGHT then DOWN until the ﬁ eld below the word ‘Speed’ is highlighted and press ENTER.

3. Use the ARROW KEYPAD to enter a speed of 40 knots.

4. Press ENTER to ﬁ nish, and QUIT until you return to the Map Page.

Once a speed has been entered, you’ll notice that the map automatically begins to move slowly, keeping your boat centered on the display. The direction of movement, also called ‘track’, is controlled by the simulator.

You’ll now have a clearer picture of the route you are navigating. Keep in mind that when you exceed the usable range of the built-in database or the optional MapSource or BlueChart data in use, the range ﬁ eld displays ‘overzoom’ to indicate that you should exercise extreme caution using the map data. Press the ZOOM IN key to zoom into the 2 nm scale. Now that you’ve zoomed in a little closer to your route, you can pan ahead of your vessel with the cursor to review map items and create on-screen waypoints. Move the cursor to highlight the ‘TOUR3’ waypoint— just use the ARROW KEYPAD to move the cursor as close as possible to the waypoint (To move the cursor in small increments, try a series of short key presses).

Once the cursor is over the TOUR3 waypoint, you’ll notice that the waypoint symbol and name are highlighted. The data ﬁ eld at the top of the page displays the waypoint name, the range and bearing from your present position, and the coordinates for the waypoint.

To review the waypoint page for a selected waypoint:

1. With the waypoint highlighted, press ENTER.

2. To return to the Map Page, press ENTER again or press QUIT.

The waypoint will ‘highlight’ when the cursor is moved over it.

The cursor can also be used to create new waypoints right from the map display.

To create a new waypoint using the cursor:

1. Use the ARROW KEYPAD to move the cursor as close as possible to the following position: N35º 02.914; W 076º 26.152’ (Use the data window to verify the cursor position.)

2. Press and release the ENTER/MARK key to capture the cursor position. Do not hold the button down, as doing so will mark your present position, not the map position.

3. Use the ARROW KEYPAD to highlight the waypoint symbol ﬁ eld to the left of the waypoint name/ number.

4. Press ENTER to access the symbol page.

5. Use the ARROW KEYPAD to select the ‘Shipwreck’ symbol and press ENTER to conﬁ rm.

6. Highlight ‘OK’ and ENTER again to ﬁ nish.

Getting Started

Reviewing/Creating

Map Waypoints

Creating a new waypoint with the map cursor.

Data Fields

Simulated Fish Arch

Bottom

Whiteline

Thermocline

Outer edge beam returns

Frequency mode

Getting Started

Sonar Page

Dual frequency returns

Adjustment Menu

Depth Scale

Center beam return

Flasher

Sonar Page

The Sonar Page is where your GPSMAP 188/188C/238 Sounder becomes a powerful ﬁ shﬁ nder/ ﬂ asher. The top left of the screen contains data ﬁ elds, while the Adjustment Bar above the data ﬁ elds allows direct access to the settings most commonly changed while using the Sonar Page. The middle of the page contains a right-to-left moving sonar image of the water beneath your boat (Items appear as they pass under your transducer. Those items on the right side of the screen are closer to you than those on the left.). Along the right side of the screen is an adjustable scale which reﬂ ects the depth of the area being displayed. If the unit does not detect a transducer attached to the unit, a “Sonar Turned Off” message appears across the Sonar Page. You may also show a sonar ﬂ asher and color bar on the right side.

The sonar display may also be set to show a split screen view of a zoomed portion of the sonar, bottom lock (display scaled from the bottom up), or a combination of these options (see pg. 34). For example, you may choose to show dual frequency at a 2X zoom (Dual 2X) on one half and normal range dual frequency (Dual) returns on the other half. The current display mode will be displayed at the bottom of each sonar display.

On color models, sonar returns show as red (strongest), then oranges (strong), yellows (medium), greens (weaker) and blues (weakest). On grayscale models, stronger returns appear darker and weaker returns lighter. The ‘ Fish Symbols’ option (see page 38) allows you to view the actual sonar data, a ﬁ sh symbol, or a combination of both. ‘Fish Symbols’ appear as green. When the unit is set to ‘Dual’ (see page 35), the appearance of the ﬁ sh symbols (and simulated ﬁ sh returns) will change. Fish symbols from the narrower beam (200kHz) will be solid (or narrow returns), but the returns from the wider beam (50kHz) will be hollow (or wide returns). Simulated ﬁ sh icons are displayed in three different sizes. Actual ﬁ sh returns may not always appear as perfect arches, due to the speed, ﬁ sh orientation, and/or other conditions.

More on understanding the Sonar Page may be found on pages 111 and in Appendix I.

Using the Adjustment Menu

The Adjustment Menu allows direct access to the settings and features most commonly used on the Sonar Page. There are 10 main adjustment options available: Range, Zoom, View/Span, Gain, Target Level, Whiteline, Frequency, Depth Line, Noise Reject, and Scroll. The currently selected option appears in the upper left of the display with up and down arrows on either side of the option name.

To select an adjustment option from the Sonar Page:

1. Press the ARROW KEYPAD LEFT/RIGHT to scroll through the options in the upper left of the display, then press ENTER to access the desired option’s adjustment window.

OR:

1. Press MENU, highlight ‘Adjustments’ and press ENTER. A list of all options and their current settings appears, with the selected option highlighted. Press UP/DOWN on the ARROW KEYPAD to select the desired option and press ENTER to access the adjustment window.

To easily exit any of the adjustment options, press the QUIT key.

To change an Adjustment Menu setting:

1. Select an adjustment option to change using one of the two methods described above. The adjustment window will automatically timeout and disappear when idle for 20 seconds.

2. Press the ARROW KEYPAD UP/DOWN to place the pointer or setting bar at the desired setting, range or percentage (Off, 1-100%).

3. Press ENTER or QUIT to exit the adjustment window; or press LEFT/RIGHT on the ARROW

KEYPAD to view another adjustment window.

To change a setting back to ‘Normal’ or ‘Auto’:

1. On the adjustment window for the desired option, press MENU.

2. Select the desired setting and press ENTER.

For detailed information on the functions and options of the Sonar Page, see pages 33-39. To learn

more about how sonar works, see Appendix I.

Getting Started

Sonar Page

Press MENU, highlight ‘Adjustments’ and press ENTER to see a list of all options and their current settings.

Zoom adjustment options

Current Destination

Data Fields

Getting Started

Compass Page/

Numbers Page

Compass Page

Compass

Ring

Pointer

Arrow

Now that we’re navigating to an actual destination, let’s move on to the GPSMAP 188/188C/238

Sounder’s navigation pages by pressing the PAGE key.

Compass Page

The Compass Page provides graphic steering guidance to a destination waypoint, with an emphasis on the bearing to your destination and current direction of travel. The middle of the page features a rotating ‘compass ring’ that shows your course over ground (track) while you’re moving, and a bearing pointer that indicates the direction of the destination (bearing) relative to the course over ground. The compass ring and pointer arrow work independently to show—at a glance—the direction of your movement and the direction to your destination. For instance, if the arrow points up, you are going directly to the waypoint. If the arrow points any direction other than up, turn toward the arrow until it points up—then continue in that direction.

The current speed, distance to the next waypoint, turn angle, and current position are displayed at the top of the screen. This page provides better steering guidance when travelling at slower speeds and/ or when making frequent directional changes. When you are not navigating to a waypoint, the compass will show your direction of travel as you move but the arrow will not appear.

Numbers Page

Press PAGE to see the next page appearing in the main sequence, the Numbers Page. The Numbers Page allows for precision navigation to 1 degree of steerage. The default page displays 3 large numbers ﬁ elds. You may customize the Numbers Page to display the size and number of ﬁ elds along with the type data you wish to see. (See pages 26-28 for changing the types of data.)

Numbers Page

To split the data ﬁ elds:

1. Press MENU, then press ENTER. Highlight the ‘SPEED’ data ﬁ eld and press MENU.

2. Highlight ‘Split Numbers’, then press ENTER. You will now see four new data ﬁ elds. Press QUIT when done.

3. To return to the original conﬁ guration, repeat the above steps, but instead of ‘Split Number’, select either ‘Merge Numbers’ or ‘Defaults’. Press QUIT when done.

Let’s move on to the Highway Page by pressing the PAGE key.

Highway Page

The GPSMAP 188/188C/238 Sounder’s Highway Page also provides graphic steering guidance to a destination waypoint, placing greater emphasis on the straight-line desired course and the distance and direction you are off course. As you head toward your destination, the middle of the screen provides visual guidance to your waypoint on a moving graphic “highway.” Your present position is at the bottom center of the highway display. The line down the middle of the highway represents your desired course.

As you navigate toward a waypoint, the highway will actually move, indicating the direction you’re off course. To stay on course, simply steer toward the center of the highway or “keep it on the road”. The four default data ﬁ elds at the top of the page indicate ‘Speed’ and ‘Distance To Next’ point, along with ‘To Course’ which shows the bearing to get you back on course and ‘Time To Next’ point. Additionally, a compass ribbon is displayed to show your current heading along with a dark, vertical bar which will indicate the direct bearing to the navigation point. When the red, vertical indicator lines up with the black bar in the middle, you are heading directly to the navigation point. Use the Highway Page as your primary navigation page (in lieu of the Compass Page) when your main concern is following a deﬁ ned course.

Current Destination

Data Fields

Desired Course

Getting Started

Numbers Page/

Highway Page

Numbers Page with split numbers

Present

Position

Zoom

Scale

Highway Page

Getting Started

Highway Page

Whenever the GPSMAP 188/188C/238 Sounder is in simulator mode, you can also adjust your speed and course from the Highway Page using the ARROW KEYPAD. As you head toward each waypoint in the tour route, try adjusting your boat speed and course to get a feel for how the highway works.

To adjust the simulated boat speed/heading from the Highway Page:

1. Press the UP arrow of the ARROW KEYPAD to increase the speed in 10 knot/kph/mph increments. Press the DOWN arrow to decrease the speed in the same increments. Press the LEFT and RIGHT arrows of the ARROW KEYPAD to steer the boat (adjust the heading).

Steer towards the center of the highway or towards the black vertical bar on the compass ribbon to get back on course.

)

on course. You can zoom in or out on the Highway display for a smaller or larger view. Five available settings range from 1X to 16X, with a default setting of 8X. The current scale appears in the bottom right of the display.

NOTE: In simulator mode, you may also change the simulated speed by pressing UP or DOWN on the ARROW KEYPAD from the Compass page.

Notice that as you get off course, the highway will move to give you graphic guidance to get back

To zoom in or out on the highway display:

1. Press either the IN or OUT key to increase or decrease the zoom scale.

Changing Data Fields

The data ﬁ elds on the main pages may also be conﬁ gured to display several different information categories (see pages 26-27 for the complete list). On the Highway Page, let’s change the ‘TIME TO NEXT’ ﬁ eld to ‘TIME OF DAY’.

To change a data ﬁ eld:

1. Press the MENU key to display the Highway Page options.

2. With ‘Change Numbers’ highlighted, press ENTER.

3. Use the ARROW KEYPAD to highlight ‘TIME TO NEXT’, then press ENTER.

4. On the alphabetical list of options, use the ARROW KEYPAD to highlight ‘TIME OF DAY’ and press ENTER. (You will see a scroll bar on the right side of the window indicating your current position on the entire list of options.)

5. Press QUIT when ﬁ nished.

Active Route Page

Press PAGE to see the last page appearing in the main sequence, which is the Active Route Page. Whenever you have activated a route or Follow Track, this page lists the names of the route points along with useful data for each point. As you navigate the route, the information will automatically update to indicate the next point along the route. For more detailed information on the Active Route Page, see page 64.

Getting Started

Changing Data Fields/

Active Route Page

You may choose from several different types of data

Current waypoint

Active Route Page

Main Menu Tabs

Getting Started

Main Menu Page/

Deleting Waypoints

Main Menu

Submenu

Tabs

Main Menu Page

As you’ve seen, the primary pages provide map and navigation information. The tour’s last page is the Main Menu page, which allows access to the GPSMAP 188/188C/238 Sounder’s waypoint, route, and planning functions, as well as various operational and navigation setup features, and celestial and tide data.

The Main Menu is available from any page, and is accessed through the MENU key.

To access the main menu page:

1. Press the MENU key twice.

The Main Menu page lists 19 vertical ‘tabs’ that are divided into categories by function. You can view a particular menu by simply highlighting the desired tab, which will then show any secondary (horizontal) submenu tabs and options for that tab.

To get a basic feel for how the Main Menu page works, let’s delete the two waypoints you created during the simulated tour. This will ensure that you have a clean slate once you start navigating in your home waters.

To delete the practice waypoints:

1. Use the ARROW KEYPAD to highlight the ‘Points’ menu tab. You will see a list of stored waypoints appear to the right of the Main Menu list.

2. Press RIGHT one time on the ARROW KEYPAD to highlight the ‘User’ tab.

3. Press DOWN on the ARROW KEYPAD and highlight waypoint ‘001’ with the shipwreck symbol.

4. You may delete the waypoint by either pressing MENU, then highlighting ‘Delete Waypoint’; or by pressing ENTER and then highlighting ‘Delete’ from the Waypoint Edit page.

5. Press ENTER to delete the waypoint, then ENTER again to conﬁ rm. Repeat the above steps to delete the ‘Dock’ waypoint also.

+ 104 hidden pages