User manual GARMIN GPS 12CX

IN GOTO OUT PAGE MARK QUIT ENTER © Copyright 1999 GARMIN Corporation 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 Corporation. GARMIN Corporation hereby grants permission to download a single copy of this manual and of any revision to 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 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. Garmin International, Inc. 1200 E. 151st Street, Olathe, KS 66062 USA Tel: 913-397-8200 FAX: 913-397-8282 Garmin (Europe) Ltd., Unit 5, The Quadrangle, Abbey Park Industrial Estate, Romsey SO51 9AQ UK Tel: 011-44-1794-519944 FAX: 011-44-1794-519222 Garmin (Asia) Corp. 3F, No. 1, Lane 45, Pao Hsing Road, Hsin Tien, Taipei, Taiwan R.O.C. Tel: 011-886-02-2917-4107 FAX: 011-886-02-2917-1758 Web Site Address: www.garmin.com January 1999 - Part Number 190-00160-00 Rev. B. Printed in Taiwan INTRODUCTION GPS 12CX OWNER'S MANUAL Packing List Thank you for choosing the GARMIN GPS 12CX--the smallest, easiest-to-use GPS navigator for outdoor use! The GPS 12CX represents GARMIN's continuing commitment to provide quality navigation information in a versatile and user-friendly flexible design you'll enjoy for years. To get the most from your new GPS, take the time to read through the owner's manual in order to understand the operating features of the GPS 12CX. This manual is organized into four sections for your convenience: Introduction-- gives a quick overview of the manual and contains the table of contents and the glossary of navigational terms. Quick Start-- introduces you to the basic features of the unit and provides a quick-start orientation to the GPS 12CX. Reference-- provides details about the advanced features and operations of the GPS 12CX by topic. The Appendices-- contains initialization instructions and items with multiple listings, such as map datums, time offsets, and the index. Before getting started with your GPS, check to see that your GARMIN GPS 12CX package includes the following items. If you are missing any parts, please contact your dealer immediately. Standard Package: · GPS 12CX Unit · Wrist Strap · Owner's Manual · Quick Reference Guide i INTRODUCTION Caution The GPS system is operated by the government of the United States, 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 GPS 12CX is a precision electronic NAVigation AID (NAVAID), any NAVAID can be misused or misinterpreted and, therefore, become unsafe. Use the GPS 12CX at your own risk. To reduce the risk of unsafe operation, carefully review and understand all aspects of this Operator's Manual and thoroughly practice operation using the simulator mode prior to actual use. When in actual use, carefully compare indications from the GPS 12CX to all available navigation sources including the information from other NAVAIDs, visual sightings, maps, etc. For safety, always resolve any discrepancies before continuing navigation. NOTE: This device meets requirements for Part 15 of the FCC limits for Class B digital devices for home or office use. It has been tested for compliance with all necessary FCC standards. 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 other equipment, which can be determined by turning the equipment off and on, the user is encouraged to try and correct the interference by relocating the equipment or connecting the equipment to a different circuit than the affected equipment. Consult an authorized dealer or other qualified service technician for additional help if these remedies do not correct the problem. Operation is subject to the following conditions: (1) This device cannot cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. The GPS 12CX does not contain any user-serviceable parts. Repairs should only be made by an authorized service center. Unauthorized repairs or modifications could void your warranty and your authority to operate this device under Part 15 regulations. ii INTRODUCTION Table of Contents SECTION ONE Introduction Glossary .......................................................................................... iv-v Accessories ........................................................................................ vi SECTION TWO Quick Start Battery Installation ............................................................................. 1 Keypad Usage and Data Entry ........................................................... 2 Primary Page Overview ................................................................. 3-4 Power On, Screen Contrast & Marking a Position ......................... 5 Position Page, Map Basics & Going to a Waypoint ......................... 6 Compass Page .................................................................................... 7 Cancelling a GOTO, Clearing Map & Power Off ............................. 8 SECTION THREE Reference Satellite Status Page ............................................................................ 9 Receiver Status ................................................................................. 10 Battery Level Indicator ..................................................................... 11 Backlighting, and Emergency Erase ................................................ 11 Position Page & User Selectable Fields .................................... 12-13 Map Page, Panning and Waypoint Display ............................. 14-15 Map Page Setup .......................................................................... 16-18 Navigation Pages ........................................................................ 19-22 Creating, Managing and Using Waypoints ............................... 23-29 TracBack Navigation .................................................................. 30-31 Creating and Navigating Routes ................................................ 32-36 Menu Page--Distance and Sun Calculations ................................. 37 Menu Page--System Setup .............................................................. 38 Menu Page--Navigation Setup .................................................. 39-40 Menu Page--Alarms Setup .............................................................. 41 Menu Page--Interface Setup ..................................................... 42-43 Menu Page--Language Setup & Find City ..................................... 44 Navigation Simulator ....................................................................... 45 SECTION FOUR Appendix Appendix Appendix Appendix Appendix Appendix Appendices A--Initialization ....................................................... 46-47 B--Specfications and Wiring ................................... 48-49 C--Messages ............................................................. 50-51 D--Time Offset ............................................................... 52 E--Map Datums ....................................................... 53-54 F--Index ................................................................... 54-56 iii INTRODUCTION Glossary The GPS 12CX is a powerful navigation tool that can guide you anywhere in the world. To better understand its operation and capabilities, it may be helpful to review the basic terms and concepts briefly explained below. Other navigation and GPS definitions used in the manual are defined in the appropriate reference sections of the manual. Almanac Data Satellite constellation information (including location and health of satellites) that is transmitted to your receiver from every GPS satellite. Almanac data must be acquired before GPS navigation can begin. Bearing The compass direction from your position to a destination. Course Made Good (CMG) The bearing from the "active from" position (your starting point) to your present position. Crosstrack Error (XTK) The distance you are off a desire course in either direction. Desired Track The compass course between the "from" and "to" waypoints. Differential GPS (DGPS) An extension of the GPS system that uses land-based radio beacons to transmit position corrections to GPS receivers. Estimated Time of Arrival (ETA) The time of day of your arrival at a destination. Estimated Time Enroute (ETE) The time left to your destination at your present speed. iv INTRODUCTION Glossary Grid Coordinate system that projects the earth on a flat surface, using square zones for position measurements. UTM/UPS and Maidenhead formats are grid systems. Ground Speed The velocity you are traveling relative to a ground position. Latitude The north/south measurement of position perpendicular to the earth's polar axis. Navigation The process of traveling from one place to another and knowing where you are in relation to your desired course. Position An exact, unique location based on a geographic coordinate system. Track (TRK) The direction of movement relative to a ground position. Universal Transverse Mercator (UTM) A grid coordinate system that projects global sections onto a flat surface to measure position in specific zones. Velocity Made Good (VMG) The speed you are traveling in the direction of the destination. Waypoint A specific location saved in the receiver's memory. v INTRODUCTION Accessories Accessories are available from your dealer or directly from GARMIN. To order an accessory directly from GARMIN, call (913) 397-8200 between 8:00 am and 5:00 pm Central Time. Swivel Mount Bracket Part Number--010-10048-00 Mount will swivel 360° at base, unit can be tilted approximately 30° forward or backward. Carrying Case Part Number--010-10117-00 Zippered case is lined and has a belt loop . GA 27 Amplified Antenna Part Number--010-10052-00 Helps the GPS 12CX acquire weak satellite signals. Great for the car! Cigarette Lighter Adapter Part Number--010-10085-00 Plugs into 12 and 24 volt systems to run the GPS 12CX on external battery power. PC Software and Cable Kit Part Number--010-10054-00 This DOS based software allows you to easily manage and create waypoint and routes. Not Shown: Bicycle Mount ­ 010-10115-00 Power Data Cable ­ 010-10082-00 Data Transfer Cable (unit to unit) ­ 010-10142-00 PC Interface Cable (serial connector only) ­ 010-10165-00 PC Interface Cable (wo/lighter adapter) ­ 010-10141-00 GA 28 Marine Antenna ­ 010-10052-00 vi Battery Installation QUICK START Battery Installation The GPS 12CX operates on 4 AA batteries (included), which are installed at the base of the unit. These batteries provide up to 36 hours of use in "Power Saver" mode. To install the batteries: 1. Remove the battery cover by turning the thumb loop at the bottom of the unit 1/4 turn counter- clockwise. 2. Insert the batteries into position. The battery pole that you can still see should match the symbol (+ or -) marked on the case. 3. Replace and secure the battery cover by turning the thumb loop 1/4 turn clockwise. Battery life varies due to a variety of factors, including temperature and backlighting. You may find that lithium batteries provide longer life in colder conditions. To install the carrying lanyard, place the loop at the end of the lanyard through the thumb loop on the battery cover, route the lanyard back through the loop and pull tight. 1 QUICK START Keypad Usage & Data Entry IN GOTO OUT PAGE MARK The POWER key turns the unit on and off, activates the screen backlighting and contrast control. The PAGE key scrolls through the main data pages in sequence and returns display from a submenu page to a primary page. The MARK key captures a position and displays the mark position page. The GOTO key displays the GOTO page with the waypoint highlighted for GOTO operation. Pressing the GOTO key twice activates MOB. The ENTER key confirms data entry and activates highlighted fields to allow data entry. The QUIT key returns the display to a previous page, or restores a data field' s previous value. The IN and OUT keys either increase or decrease the map scale. The ROCKER key controls the movement of the cursor and is used to select options, positons, and to enter data. QUIT ENTER Press the ROCKER key up or down to select letters or numbers in a data field. Pressing the ROCKER key left or right, moves the cursor forward or backward along the data path. 2 Primary Pages The GPS 12CX has five primary information pages, the Satellite, Position, Map, Navigation and Menu pages. Pressing the PAGE key will move the display forward through the information pages, pressing the QUIT key will move the display backward through the pages. Below is a brief overview of each page. A detailed description of each information page is available in the reference section of this manual. QUICK START Primary Pages Satellite Page The Satellite Page shows satellite positions and signal strength. Satellite positions are displayed using two circles and a center point. The outer circle shows satellites on level with the horizon; the inner circle is 45° above the horizon; and the center point represents satellites directly overhead. Knowing satellite positions will show you the direction of any blocked signals. The bottom of the page contains a row of signal strength bars corresponding to each satellite being used. Position Page The Position Page shows you where you are, what direction you are heading and how fast you are going. The top of the page shows a compass tape. The compass tape provides a graphic representation of your track. Your track and speed are displayed directly below the compass tape. The graphic compass tape reflects your track only while you are moving. Satellite Page Only solid bars on the Satellite page represent satellites being used for navigation The next fields on the page are the Trip and Alt fields. Further information on these fields can be found on page (12). The rest of the page shows your current location in three dimensions; latitude, longitude, and altitude. A 12/24 hour clock is provided at the bottom of the page. Position Page 3 QUICK START Map Page The Map Page allows you to view your position, the "path" you have traveled over, and nearby waypoints. A diamond icon in the center of the screen represents your current position. As you move, you will see a thin line - called a track log - appear along the path you have just covered. Names of stored waypoints can also be shown on the map. The bottom corners of the map will always display your current track and speed. When going to a waypoint, highlighting an on-screen waypoint, or using the panning target crosshair, the corresponding distance and bearing are shown at the top corners of the map. Press ENTER to access the setups for this page. Primary Pages Navigation Page Map Page The Map Page shows your progress on a moving map plotter and gives a bird's-eye-view of surrounding waypoints. A navigation page gives you steering guidance when going to a waypoint. The GPS 12CX has two navigation page choices: the Compass Page and the Highway Page. The Compass Page is the default and will be briefly explained here. The Highway Page is covered on page 22. The Compass Page shows the destination waypoint at the top of the page with the bearing (BRG) and distance (DST) to the waypoint shown below. The center of the page contains a compass ring and arrow to show you the direction of the waypoint from the direction you are moving. The bottom of the page gives your track (TRK), speed (SPD), and a selectable field for estimated time to arrival (ETA), estimated time enroute (ETE), course to steer (CTS), crosstrack error, (XTK), velocity made good (VMG), or turn bearing (TRN). ompass Compass Page The Compass Page is the default navigation page and will show you the direction of the waypoint relative to the direction that you are traveling. Menu Page The last primary page is the Menu Page The Main Page. Menu Page gives you access to the GPS 12CX's waypoint management, route, track log, and setup features through a list of submenus. Menu Page The Menu Page allows quick access to the unit setups, and the waypoint management system. 4 Quick Start Tour The Quick Start Tour will teach you the basic operation of your GPS 12CX. This tour assumes that none of the factory settings (units of measure, selectable fields) have been changed. If the settings have been changed the pictures and descriptions you see in the manual may not match what you see on the screen. QUICK START Power On & Marking a Position Turning on the GPS 12CX 1. Press the POWER key, hold until the unit turns on. The welcome page and database info pages will appear while the unit conducts a self test. Once testing is complete, the Satellite Page will appear. When sufficient satellite signals have been acquired, the Satellite Page will be replaced by the Position Page. Adjusting the Contrast It may be necessary to adjust the display contrast in varying light conditions. The contrast adjustment can be accessed from any of the five main pages by pressing the POWER key briefly. After the contrast adjustment page appears, pressing the ROCKER left or right will either decrease or increase the display's contrast. Marking a Position GPS is really about marking and going to places called waypoints. Before we can use our GPS 12CX to guide us somewhere, we have to mark a position as a waypoint. (Your GPS 12CX can hold up to 1000 waypoints.) To mark your present position: 1. Press the MARK key. The mark position page will appear, with a default three-digit name for the new waypoint in the upper-left portion of the page. To rename the waypoint: 1. Highlight the name field, and press ENTER. 2. Enter the waypoint name `HOME', and press ENTER. (See pg. 2 for data entry.) The waypoint symbol field will become highlighted. To change the waypoint symbol: 1. Highlight the waypoint symbol field, press ENTER. 2. Select the house symbol, and press ENTER. 3. Select the desired color and press ENTER. 4. Move the cursor to `DONE?', press ENTER. Press the POWER key briefly to activate the contrast adjustment window. Pressing the ROCKER left or right will decrease or increase the screen contrast. To Mark Your Present Position Renaming a Waypoint Changing Waypoint Symbol 5 QUICK START Using the Position Page Walk briskly for 3 - 4 minutes and watch the position page. This is a good opportunity to compare the Compass Tape at the top of the page and the Track (the direction that you are moving), as long as you are walking briskly they should be a direct reflection of one another. The speed that you are traveling, distance you have traveled, and the altitude are also displayed on the upper portion of the screen. The lower portion contains your latitude and longitude, notice that the current position is continually updating as long as you are moving. The current time is displayed at the bottom of the page. Let's continue by looking at the Map Page: 1. Press PAGE to display the Map Page. Position/Map Pages & Going To a Waypoint Map Page Selecting Map Zoom Level To ensure that we can see our entire trip on the map, lets change the map scale from the default .2 MI to .8 MI. 1. Press and release the OUT button three times. This quickly adjusts the map scale to the desired .5 MI setting. To display the current map scale setting longer, hold the IN or OUT button. The Map Page shows your present position as a diamond icon in the center of the map. The house symbol labeled `HOME' is the waypoint that you created when you `MARKED' your position, the line connecting the two is called the `TRACK LOG'. 1. Now turn approximately 90° to your left and continue walking for another 2 - 3 minutes. Notice how the dis play changes always keeping the direction that you are traveling toward the top of the map and your track log updates continually leaving a breadcrumb trail of where you have been. Map Page (making a left turn) Going to a Waypoint Once you've stored a waypoint in memory, you may return to it by performing a GOTO. A GOTO is a straightline course from your present position to the destination you've selected. Let's navigate back to our starting position, the HOME waypoint. To select a GOTO destination: 1. Press GOTO. 2. Highlight the HOME on the `G-H-I' tab and press ENTER. You'll notice that you'll automatically return to the Map Page, and a straight line will connect your current position to the HOME waypoint. Let's continue by moving to the Compass Page: 1. Press PAGE to display the Compass Page Going to a Waypoint 6 Compass Page QUICK START Bearing to Waypoint Pointer to Waypoint Compass Ring Track Over Ground Destination Waypoint Distance to Waypoint Speed Over Ground Compass Page & Cancelling a GOTO Whenever you select a destination waypoint, the GPS 12CX provides graphic steering guidance with the Compass Page (the default navigation page). The "compass ring" in the middle of the page acts much the same as the "compass tape" at the top of the Position Page, it provides a graphic representation of your present track (TRK). The "pointer" is a graphic representation of the direction or bearing (BRG) to the destination waypoint, and points in the direction you need to travel. The pointer does not function as a magnetic compass. Navigation is active only while the GPS 12CX is moving. The Compass Ring is a graphic representation of the track (TRK). For instance, if the "pointer" is pointing toward the top of the display then you are heading toward the destination waypoint. If the "pointer" is pointing in any other direction, turn in the direction of the "pointer" until it is pointing to the top, then continue in that direction. The bearing (BRG) and distance (DST) to the destination waypoint are displayed at the top of the screen, the track (TRK) and speed (SPD) are shown below. The default `ETE' field at the bottom of the screen, is a user selectable field that can provide a variety of navigation information. As you get closer to `HOME', you will be alerted to press PAGE. The GPS 12CX will give you the message "Approaching HOME". Once you have arrived the distance field will read 0.00. The Pointer is a graphic representation of the bearing (BRG). Getting the Message 7 QUICK START Cancelling a GOTO If you decide to stop navigating to the active waypoint, all you have to do is cancel the GOTO. To cancel an active GOTO: 1. Press the GOTO key. 2. Use the ROCKER to move the highlight to the OPT tab. 3. Highlight `CANCEL GOTO' and press ENTER. Cancelling a GOTO Clearing a Cluttered Map Display After you have used the GPS 12CX a few times, you may find that the display has become cluttered with old track log information. The track log is the bread crumb trail that you left on the screen. It is generally a good idea to start a trip with a clean track log, so for practice, lets clear the track log we created during this tour. Cancelling a GOTO 1. Press PAGE or QUIT until the Map Page is displayed. 2. Press ENTER to display the Map Setup Page. 3. Highlight `TRACK SETUP' and press ENTER. 4. Highlight `CLEAR LOG?' and press ENTER. 5. Highlight `YES' on the Warning Page and press ENTER. Screen Backlighting The GPS 12CX has thee levels of screen backlighting available for use, OFF, LOW, and HI. After being activated, the backlighting will remain on for the amount of time specified on the System Setup Page (See page 38). To activate the screen backlighting: 1. Briefly press the POWER key twice to activate the first level (low, one bulb), or three times to activate the second level (hi, two bulbs). Clearing a Cluttered Map Either one or two bulb icons will be displayed along the bottom of the Contrast Adjustment Page, indicating the level of screen backlighting that you have activated. Turning off the Receiver To activate screen backlighting You have now gone through the basic operation of your new unit and probably know a little more than you think about how it works. We encourage you to experiment with the GPS 12CX until it becomes an extension of your own navigation skills. If you encounter any problems using the unit or want to take advantage of the more advanced features, turn to the reference section starting on page 9. To turn the GPS 12CX off: 1. Press and hold the POWER key for 3 seconds. Turning off the GPS 12CX 8 Status Field Horizontal Accuracy REFERENCE Battery Indicator Skyview Display Satellite Page Signal Strength Indicators The GPS 12CX's Satellite Page displays the status of various receiver functions. The status information will help you understand what the GPS 12CX is doing at any given time, and will tell you whether or not the receiver has calculated a position fix. Horizon 45° Above Horizon Sky View and Signal Strength Bars The sky view and signal strength bars give you an indication of what satellites are visible to the receiver, whether or not they are being used to calculate a position fix, and the signal quality. The satellite sky view shows a bird's-eye-view of the position of each available satellite relative to the unit's last known position. The outer circle represents the horizon (north up); the inner circle is 45º above the horizon; and the center point is directly overhead. You can use the sky view to help determine if any satellites are being blocked, and whether you have a current position fix (indicated by `2D NAV' or `3D NAV' in the status field). You can also set the sky view to a track up configuration by changing the `orientation' option on the Map Page. (See pg. 16 for setup instructions.) When the receiver is looking for a particular satellite, the corresponding signal strength bar will be blank and the sky view indicator will be highlighted. Once the receiver has found the satellite, a strength bar will appear indicating that the satellite has been found and the receiver is collecting data from it. The satellite number in the sky view will no longer appear highlighted. As soon as the GPS 12CX has collected the necessary data to calculate a fix, the status field will indicate a 2D or 3D status. Directly Overhead Looking for Satellite Satellite Being Used 9 REFERENCE Receiver Status Receiver status is indicated at the top left of the page, with the current horizontal accuracy (estimated position error, in feet or meters) at the top right. The status will be shown as one of the following conditions: Searching ­ the GPS 12CX is looking for any available satellites in view. AutoLocate ­ the GPS 12CX is initializing and collecting new almanac data. This process can take 5 minutes, depending on the satellites currently in view. Acquiring ­ the receiver is collecting data from available satellites, but has not collected enough data to calculate a 2D fix. 2D Nav (2D Navigation) ­ at least three satellites with good geometry have been locked onto and a 2-dimensional position fix (latitude and longitude) is being calculated. `2D Diff' will appear when you are receiving DGPS corrections in 2D mode. 3D Nav (3D Navigation) ­ at least four satellites with good geometry have been locked onto, and your position is now being calculated in latitude, longitude and altitude. `3D Diff' will appear when you are receiving DGPS corrections in 3D mode. Poor Cvg (Poor GPS Coverage) ­ the receiver isn't tracking enough satellites for a 2D or 3D fix due to bad satellite geometry. Not Usable ­ the receiver is unusable, possibly due to incorrect initialization or abnormal satellite conditions. Turn the unit off and back on to reset, and reinitialize the receiver if necessary. Simulator ­ the receiver is in simulator mode. Satellite Status Page Receiver Status Receiver Status Options EZinit Option Prompt The Satellite Page also provides access to the EZinit prompt whenever a position fix has not been calculated. (The unit must be in searching, AutoLocate, acquiring, simulator, or poor coverage mode.) This allows you to reinitialize the unit (see Appendix A), and is useful if you have traveled over 500 miles with the receiver off and must initialize your new position. To access the EZ-Init feature, without satellite coverage press ENTER while the Satellite Status Page is displayed. 10 EZinit Option Prompt (continued) (The EZinit prompt will automatically appear if the receiver needs to be initialized. The prompt may also appear during normal use if the antenna is shaded or the unit is operated indoors.) REFERENCE Battery Level Indicator The Satellite Page also features a battery level indicator, located to the left of the sky view, which displays the strength of the unit's batteries. The battery level indicator is calibrated for alkaline batteries. Ni-Cad and lithium batteries will not display accurately. Satellite Status Page The GPS 12CX features a rechargable internal lithium battery that will maintain the unit's memory for several months without batteries installed. When new batteries are installed or the unit is operated on external power, the internal lithium battery will renew its charge. Backlight Bulb Icon + Backlight Bulb Icon The GPS 12CX features three level (off, low, high) full-screen backlighting. Anytime the backlight is on, a bulb icon will be displayed on the satellite page. Emergency Erase Function You may erase the GPS 12CX's memory in four quick steps. This will cause all stored data to be deleted, including routes, waypoints, and the track log. To erase all stored data: 1. Ensure that the GPS 12CX is turned off. 2. While holding down the MARK key, turn the unit o n . Once the unit is on release the keys. A warning message will appear with `YES' highlighted, and ask you to confirm your selection. 3. If you do wish to complete the emergency erase, press ENTER to confirm. 4. If you do not wish to erase all stored data, press the ROCKER to the right to select `NO' then press ENTER. Emergency Erase When the Emergency Erase is complete, a message will verify that the "Stored Data Was Lost". Emergency Erase Abort 11 REFERENCE Position Page The second page in the GPS 12CX's primary page sequence is the Position Page. This page shows you where you are, what direction you're heading, and how fast you're going, and it's most useful when you are traveling without an active destination waypoint. The Compass Tape at the top of the page is a graphic representation of the track, and indicates the direction you're heading while you're moving. Directly below this display are the track, speed, trip odometer and the altitude (default) fields. Below these fields is the position field. The position field indicates your current latitude and longitude in degrees and minutes. The GPS 12CX uses this basic information to mark exact positions as waypoints, which help guide you from one place to another. The bottom of the page contains a 12- or 24-hour clock. Both the trip odometer and the altitude fields are user selectable, and both offer a trip odometer, trip timer, and elapsed time. This way, you can always be sure of viewing this information regardless of the option you've selected for the other user-selectable field. The following user-selectable options are available on the Position Page: Trip Odometer (TRIP)-- total distance traveled since reset. Trip Timer (TTIME)-- total (cumulative) time in which a ground speed has been maintained since last reset. Elapsed Time (ELPSD)-- total time in hours and min utes since last reset. Position Page Position Page User Selectable Options Average Speed (AVSPD)-- average speed traveled since last reset. Maximum Speed (MXSPD)-- maximum speed traveled since last reset. Altitude (ALT)-- vertical distance above mean sea level. To reset TTIME, MXSPD, AVSPD, or TRIP: 1. Highlight the user-selectable field, and press ENTER. `Reset' will appear as a selectable option. 2. Press ENTER to confirm or QUIT to exit. To Reset TTIME, MXSPD, AVSPD, or TRIP The trip odometer, trip timer, and average speed fields are linked. Resetting one of these options in a userselectable field will automatically reset the corresponding data in the other. This ensures that information shown in these fields reflects your current trip. 12 Maximum Speed Field To obtain the most accurate reading of your maximum speed, keep in mind that due to the sensitivity of the GPS 12CX's antenna, your maximum speed value may include the effects of rapid movement, such as swinging your arm while holding the unit. To reset the maximum speed field: 1. Highlight the `MXSPD' field, and press ENTER. 2. Press ENTER to confirm the `RESET?' prompt. REFERENCE Maximum Speed & Altitude Fields Altitude Field When the GPS 12CX is acquiring satellites or navigating in the 2D mode, the last known altitude is used to compute your position. You may also manually enter your altitude for greater accuracy. In cases where the GPS 12CX has 2D coverage, entering your approximate altitude will enable the receiver to determine a more accurate position fix. To enter an altitude: 1. Highlight the `ALT' field, and press ENTER. 2. Enter a value, and press ENTER. Maximum Speed Reset Position Field The GPS 12CX displays the current GPS location in degrees-minutes -decimal minutes (default) or a variety of user selectable position formats. See page 39 for more information on user selectable position formats. 12/24 Hour Clock The GPS clock can be configured to display in a 12 or 24 hour format. For more information on setting up the clock see page 37. Entering an Altitude Position Field 13 REFERENCE Map Page Bearing to Waypoint Distance to Waypoint Map Page Track Line Present Position Route Line Track Over Ground Speed Over Ground Map Scale 5.0 miles The Map Page shows your current position and surroundings, and provides you with a target cursor that lets you pan ahead to nearby waypoints, determine the distance and bearing to a map position or nearby waypoint, and mark new waypoints while you navigate. The map displays your present position as a diamond icon, with your track and/or route displayed as a solid line. Nearby waypoints are represented as squares or icons with the waypoint name listed above. You may select the features that are displayed on the map through the map setup submenu page (see page 16 for more information). The four corners of the Map Page are used to display navigation data, including the bearing and distance to a destination waypoint and your current track and speed over ground. The two fields at the top corners of the map show your bearing and distance to one of three selectable destinations: an active destination waypoint, a highlighted waypoint, or the panning target crosshair. If you are not navigating to a waypoint or using the panning function, the top data fields will not be displayed. Your current track and speed are shown at the bottom corners of the display. Map Scale 3.0 miles Map Scale 2.0 miles Increasing or decreasing the map scale varies the level of detail available on the map. A small map scale increases the "upclose" detail on the map, while a large map scale increases the "overall" viewing area. Zooming -- Changing the Map Scale The map scale can be changed to display the map at 18 different zoom levels. To select a map scale: 1. Press the IN or OUT key until the desired zoom level is displayed on the map. 14 Panning To pan around the map simply use the ROCKER to control the direction that the target crosshair will travel. To quit the pan function and resume tracking on the map, press the QUIT key As you move around the map the distance and bearing from the current GPS location to the crosshair will be displayed in the top corners of the map. As you pan near a waypoint you will notice that the crosshair will "snap" to on-screen waypoints. Once a waypoint is highlighted, you can either review its waypoint definition page, the waypoints display options, or execute a GOTO function right from the Map Page. To review waypoint definition page for highlighted waypoint: 1. Press ENTER while waypoint is highlighted. REFERENCE Waypoint Display & GOTO Map Waypoint From the waypoint definition page, you can also define how each individual waypoint is displayed on the map. The GPS 12CX displays waypoints as a name with a corresponding symbol (e.g., "camp" and the camp site symbol), or a 16-character comment and corresponding symbol, (e.g., "great boat ramp" and the boat symbol). The waypoint name has a six character limit while the "comment" field has a 16-character limit, and there are 16 waypoint symbols available. To select a waypoint display option: 1. Highlight the "symbol" field (to the right of the name field), and press ENTER. 2. Move the cursor to the `DISPLAY' field and press ENTER. 3. Using the ROCKER, select one of the display options: `NAME WITH SYMBOL', `SYMBOL ONLY', or `COMMENT WITH SYMBOL'. 4. Press ENTER to confirm the selection. 5. With `DONE' highlighted press ENTER to return to the waypoint definition page. 6. With `DONE' highlighted press ENTER to return to the Map Page. Review Waypoint Definition Page or or or Select Waypoint Display Options The last function that you can perform with a waypoint highlighted, is a GOTO (see page 29 for more on the GOTO function) the highlighted waypoint. To go to a waypoint highlighted on the Map Page: 1. Press the GOTO key. 2. Press ENTER to confirm the GOTO. GOTO Map Waypoint 15 REFERENCE Using the Cursor to Mark and Goto Waypoints During panning, the crosshair represents a target position right on the Map Page, with the range and bearing to the target displayed at the top corners of the screen. You can also use the target crosshair to mark a new waypoint position or as a GOTO destination right from the map field. To mark the target crosshair as a new waypoint: 1. Pan to the desired position on the map and press MARK. 2. Enter a name and/or route number, and press ENTER. Using the Cursor & Map Setup You can also use the target crosshair as an instant GOTO destination. This feature is similar to the MOB mode, and will allow you to mark and instantly set a course for a new waypoint called `MAP'. To go to the target crosshair: 1. Place the target crosshair on the desired location. 2. Press GOTO, and press ENTER. Marking Target Crosshair Note: To save the MAP waypoint, be sure to rename it because it will be overwritten the next time a GOTO is performed using the target crosshair. Accessing Map Option Windows You can access four map option pages, (Map Setup, Track Setup, Find City, and City Setup) from the Map Page by pressing ENTER, except when panning or pointing. To select a map option: 1. Highlight the desired option and press ENTER. Map Setup Page and Orientation Going to the Target Crosshair Map Option Window The map setup page lets you select the Map Page and satellite sky view orientation, as well as specify what items are displayed. The Map and Satellite Pages may be oriented to `NORTH UP,' `TRACK UP' (the direction of current travel), or `DTK UP' (desired track up, or the direction of the desired course). The default setting is `TRACK UP'. To change the map orientation: 1. Highlight the `map' field and press ENTER. 2. Select the desired orientation and press ENTER. Selecting the `DTK UP' option will set the satellite sky view to `track up' orientation. Map Orientation Setting 16 Map Setup Page and Orientation (cont.) The rest of the map setup page lets you specify what items are displayed on the map and their color. · 'Rings'­ displays three range rings on the map at incre ments of 1/5th the selected map scale. · 'Route'­ plots the straight-leg lines between waypoints of an active route and displays all route waypoint names. · 'Waypoint'­ displays the nine nearest waypoints. · 'Label'­ displays the waypoint label or comment. · 'Track Log'­ displays and plots track log points on the map. To turn a display option on or off: 1. Highlight the data field next to the desired option and press ENTER. 2. Select `YES' or `NO' and press ENTER. To assign a color to a display option: 1. Highlight the color box next to the option data field and press ENTER. 2. Highlight the desired color and press ENTER to confirm the selection. REFERENCE Map & Track Setup Pages or or Changing the Route Display Option Track Setup Page The track setup page lets you manage the GPS 12CX's track log data. You can select whether to record a track log and define how it is recorded. · Off ­ Disables the track log. · Wrap ­ Allows the unit to continue updating the tracklog after all track log points are used by eliminating the oldest track log information. · Fill ­ Records track log information until all track log points are used. or or or Changing the Route Display Color Note: Turning the track recording off will prevent you from using TracBack. or or or Changing the Track Record Option 17 REFERENCE Track Method The track `method' option determines how often positions are stored in the track log. The default setting is `auto', which records track points based upon a set variance from your projected course over ground. This setting provides the most efficient use of track memory and the best TracBack performance. To record points based on a specific time interval: 1. Highlight the `METHOD' field, and press ENTER. 2. Select `TIME INTERVAL', and press ENTER twice. 3. Enter hours, minutes, and seconds, press ENTER. Track Method & Clearing the Track Log Managing and Clearing the Track Log or or or To clear the track log: 1. Highlight `CLEAR LOG?', and press ENTER. 2. Highlight `Yes?', and press ENTER. The rest of the track setup window displays the percentage of available memory currently used to store track log data, as well as a function field to clear the track log memory. Changing the Track Method Note: It's a good idea to clear the track log at the beginning of the trail, etc., in order to make the best use of the TracBack feature (see pg. 8). Clearing the Track Log 18 Selecting a Navigation Page Once you've selected a GOTO destination or activated a TracBack, MOB, or route; the GPS 12CX will provide graphic steering guidance to the destination with one of two navigation pages: REFERENCE Navigation Pages Compass Page Highway Page · The Compass Page (default) provides a directional pointer indicating the bearing to your destination and a rotating compass ring which shows your direction of travel (track) at the top of the ring. The Compass Page provides better guidance for car travel, hiking, or biking; where straight-line navigation is often not possible. · The Highway Page provides a graphic highway display that shows your movement relative to the desired course, with an emphasis on your cross track error ( the distance and direction you are off course). The cross track error (XTK) is depicted on a course deviation indicator (CDI) (see pg. 40). The Highway Page is well-suited for boating or some types of off-road recreation where straight line navigation is typically possible and maintaining a specified course is desirable. Both pages provide a digital display of the bearing and distance to the destination, and your current speed and track over the ground. You can switch to either Navigation Page at any time. To select either Navigation Page: 1. Press ENTER from the existing Navigation Page, and ENTER again to change the page. To switch from the Compass Page to the Highway Page, press ENTER twice. To switch from the Highway Page to the Compass Page, press ENTER twice. 19 REFERENCE Customizing the Navigation Pages User-Selectable Field User-Selectable Field The `ETE' field, located at bottom center on both pages, is a user-selectable field that allows you to display a variety of navigation values for your trip. To access the user-selectable field: 1. Highlight `ETE', and press ENTER. 2. Use the keypad to scroll through the possible options. The following data options are available: Compass Page User-selectable Options Estimated Time Enroute (ETE)-- the estimated time remain ing to reach your destination based on your present speed and track. Estimated Time of Arrival (ETA)-- the estimated time of day at which you will arrive at your destination based on current ground speed and track. Course to Steer (CTS)-- the recommended course to follow in order to reduce cross track error and stay on course. Provides the most efficient heading to get back on course and proceed along your route or GOTO. Crosstrack Error (XTK)-- the distance you are off the desired course in either direction, left or right. This field will give you a digital readout of the data depicted by the CDI. Velocity Made Good (VMG)-- the speed you are closing in on a destination along the desired course. Also referred to as the `vector velocity' to your destination. Turn (TRN)-- the angle difference between the bearing to your destination and your current track. `L' indicates you should turn left, `R' indicates you should turn right. Highway Page User-selectable Options 20 Using the Compass Page Bearing to Waypoint Destination Waypoint REFERENCE Graphic Compass Pointer to Waypoint Distance to Waypoint Using the Compass Page Speed Over Ground Track Over Ground User-selectable Field The Compass Page provides better steering guidance than the Highway Page for travel at slower speeds (e.g., walking), travel with many directional changes and when it's not necessary to follow an exact course. The bearing (BRG) and distance (DST) to the waypoint are displayed at the top of the page, below the destination waypoint name. The distance displayed is the straight-line distance from your present position to the destination waypoint. The bearing indicates the exact compass heading from you to the destination. The middle of the page features a rotating "compass ring" that shows your track, or course over ground while you are moving, with a "pointer" to the destination displayed in the center. The "pointer" shows the direction of your destination relative to the direction you are moving. For instance, if the arrow points up, you are going directly to the waypoint. If the arrow points any direction (left, right, down, etc.), turn toward the arrow until it points up. Then continue in that direction. The bottom of the page shows your track (TRK), speed (SPD), and a user-selectable field for ETE, ETA, CTS, XTK, VMG, or TRN. When you are one minute away from your destination (based on your current speed and track over ground), the GPS 12CX will alert you with a flashing on-screen message box. The COMPASS RING indicates your track (TRK), the direction that you are traveling. The POINTER indicates the bearing (BRG) to the destination waypoint. When navigating, turn in the direction of the pointer until the pointer is straight up, then continue in that direction. A quick check to verify that you are indeed traveling in the right direction, if the bearing and track are the same then you are exactly on course. Arrival Alert 21 REFERENCE Using the Highway Page Bearing to Waypoint Distance to Waypoint Using the Highway Page Track Over Ground Destination Waypoint Speed Over Ground CDI Scale Graphic Highway User Selectable Field This example indicates that you are off course to the left and need to steer right to get back on course. Coutinue turning in the direction of the highway until the highway is pointing straight up, then continue in that direction. The GPS 12CX's Highway Page provides graphic steering guidance to a destination waypoint, with a greater emphasis on the straight-line desired course and the distance and direction you are off course. The bearing and distance to a waypoint--along with your current track and speed--are displayed at the top of the screen. 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 represented by the diamond in the center of a course deviation indicator (CDI) scale. The line down the middle of the highway represents your desired track. As you navigate toward a waypoint, the highway will actually move-- indicating the direction you're off course--relative to the position diamond on the CDI scale. When the highway is pointing straight up the screen, the waypoint is directly ahead. If the destination waypoint is to the left, the top of the highway will lead to the left, and vice versa. To stay on course, simply steer in the direction the highway leads (left or right) until the highway leads straight up the page. If you do get off the desired course by more than 1/ 5th of the selected CDI range, the exact distance you are off course will be displayed where the CDI scale setting normally appears. If you get too far off course (the highway has disappeared off either side of the highway display), a message box will appear to indicate what course to steer to get back on course. (For information on how to set this scale, see pg. 40.) As you approach a waypoint, a horizontal "finish line" will move toward the bottom of the highway. When the finish line reaches the CDI scale, you've arrived at your destination. If you get too far off course, a message box will appear indicating a course to `STEER' to get back on the most efficient course. 22 Creating Waypoints The GPS 12CX allows you to store up to 1000 positions as waypoints. A waypoint can be entered by taking an instant electronic fix, by manually entering coordinates, by using the bearing and distance to a known position or by marking a position on the map page. REFERENCE Creating a Waypoint Marking a Position The GPS 12CX can instantly capture and store the present GPS location in memory for future use. To mark your present position: 1. Press MARK. The mark position page will appear, showing the captured position and a default threedigit name. 2. To save with the default name and symbol, press ENTER to confirm the `SAVE?' prompt. Changing the default waypoint name The GPS 12CX will assign a numeric default name when marking a waypoint. The name can be changed using the six digit waypoint name field. To enter a different waypoint name: 1. Highlight the waypoint name field, and press ENTER. 2. Make the appropriate changes, and press ENTER. 3. If finished changing the waypoint, Highlight `SAVE?', and press ENTER. Changing the Waypoint Name Waypoint Symbols The GPS 12CX allows you to select one of 16 symbols for each waypoint for easy recognition on the map display. From the symbol page, you may also select how the waypoint appears on the map. To select a waypoint symbol: 1. Highlight the symbol field on the waypoint definition page, and press ENTER. 2. Use the arrow keypad to select the desired symbol, and press ENTER. 3. Select the display color for the symbol and press ENTER. 4. The cursor will move to the display field, where you can select which waypoint information is displayed on the map. 5. To change the display option press ENTER, and us ing the ROCKER, select one of the following; `NAME WITH SYMBOL', `SYMBOL ONLY,' or `COMMENT WITH SYMBOL'. 6. Press ENTER to confirm your selection, and ENTER again to confirm the `DONE?' prompt. Changing the Waypoint Symbol 23 REFERENCE Waypoint Comments Each waypoint stored in the GPS 12CX has a user defined 16-character comment field. The default comment is the UTC (or Greenwich Mean Time) date and time of the waypoint's creation. To change or add a comment: 1. Highlight the comment field. 2. Press ENTER. Creating a Waypoint Note: You can clear the comment field by pressing the left side of the rocker keypad. 3. Enter the desired comment, using the ROCKER. 4. Press ENTER. Adding the Waypoint to a Route The GPS 12CX can automatically add marked waypoints to a user-selected route. This works well when you want to create a return route while moving. To add this waypoint to a route: 1. Highlight the `Add to route number' field, and press ENTER. 2. Enter a route number, press ENTER to confirm the route number, and ENTER again to save the waypoint. The waypoint will be added to the end of the selected route--after any other waypoints already in the route. Adding Waypoint to Route Waypoint Comments Position Averaging Function The GPS 12CX can use the positioning averaging function to help reduce the effects of selective availability and provide more accurate saved positions. 1. After you have pressed the MARK key, highlight the `AVERAGE?' field and press ENTER. The Figure of Merit (+/-) field will display a value reflecting estimated accuracy of the averaged position. Position Averaging Note: As the GPS 12CX calculates the FOM, initially it will change rapidly then begin to stabilize over time. 2. The unit will continue averaging until you have highlighted `SAVE?' and pressed ENTER. Saving the Waypoint After you have finished making any changes to the waypoint remember to save the waypoint. 1. Highlight `SAVE' and press ENTER. Saving the Waypoint Waypoint Pages The GPS 12CX has three waypoint pages that let you quickly manage up to 1000 waypoints. These pages-- waypoint definition, nearest waypoints, and waypoint list--can be accessed through the Main Menu Page. 24 Waypoint Definition Page Waypoint Name Waypoint Symbol Position Coordinates REFERENCE Reference Waypoint Main Menu-- Waypoint Definition Page Bearing from Reference Waypoint Function Prompts Distance from Reference Waypoint The waypoint definition page lets you create new waypoints manually or review and edit an existing waypoint's coordinates, symbols, and comments. It is also used to delete an individual waypoint from memory (see pg. 26). To create a new waypoint manually, you'll need to know its coordinates or its approximate distance and bearing from an existing waypoint. To create a waypoint by entering coordinates: 1. From the waypoint definition page, highlight `NEW?', and press ENTER. 2. Enter a waypoint name, and press ENTER. 3. Press ENTER to select a waypoint symbol, make your selection, and press ENTER. 4. Highlight the `DONE?' prompt, and press ENTER to return to the waypoint page. 5. Highlight the position field, and press ENTER. Input your position using the ROCKER, and press ENTER. 6. Press ENTER to confirm the `DONE?' prompt. The GPS 12CX's advanced waypoint planning features allow you to create new waypoints and practice navigation without ever setting foot outside. If you create a new waypoint be entering coordinates from a map, you may want to re-mark the waypoint's exact position once you get there. To re-define an existing waypoints position coordinates from the waypoint definition page, simply highlight the DST field and press ENTER. Press the ROCKER to the Left to set the distance to 0.00, then press ENTER to confirm. The previous coordinates will be replaced by the coordinates of your present position. 25 REFERENCE Reference Waypoints To create a new waypoint manually without knowing its position coordinates, you'll need to enter its bearing and distance from an existing waypoint or your present position. To create a new waypoint by referencing a stored waypoint: 1. From the waypoint definition page, highlight ` NEW?', and press ENTER. 2. Enter a waypoint name, and press ENTER. 3. Highlight the `REF' field, and press ENTER. 4. Enter a reference waypoint name (or leave the field blank to use your present position), and press ENTER. 5. Enter the bearing (`BRG') and distance (`DST') of your new waypoint from the reference waypoint. 6. Press ENTER to confirm the `DONE?' prompt. Rename, Delete & Scan Waypoints Renaming and Deleting Waypoints The rename and delete function fields are located along the bottom left side of the waypoint definition page. Renaming a Waypoint To rename a stored waypoint: 1. Highlight `RENAME?', and press ENTER. 2. Enter the new waypoint name, and press ENTER 3. Press ENTER to confirm the `Yes?' prompt. To delete a stored waypoint: 1. Highlight `DELETE?', and press ENTER. 2. Highlight the `Yes?' prompt, and press ENTER. Scanning Waypoints As you manually enter a waypoint's name, the GPS 12CX's waypoint scanning feature will automatically display the first numerical or alphabetical match of the character you have entered to that point. This helps eliminate the need to always enter a waypoint's complete name. To scan waypoints from a waypoint field: 1. Highlight the waypoint name field, and press ENTER. 2. Press the left side of the ROCKER to clear the name field 3. Scroll through the waypoints. Deleting a Waypoint Scanning Waypoints Note: The GPS 12CX's waypoint scanning feature will offer the first waypoint that matches the character or characters you have entered up to that point. If you have more than one waypoint that begins with the same letter or number, move to the next character position as needed. 4. When you find the desired waypoint, press ENTER. 26 Waypoint List Page The waypoint list page provides a complete list of all waypoints stored in the GPS 12CX. The waypoints are conveniently located on alphabetical tabs that allow quick access to any of the 1000 available waypoints. From the waypoint list page, you can retrieve a waypoint definition page, delete all user-defined waypoints, delete waypoints by symbol, or review and perform a GOTO to a selected waypoint. To locate and review a waypoint: REFERENCE Main Menu-- Waypoint List Page Note: If the highlight is not on an alphabetical tab, press the ROCKER to the left. 1. Select the tab that corresponds with the first letter of the waypoint. 2. Using the ROCKER move the highlight to the way point list. 3. Scroll through the list until the desired waypoint is highlighted. 4. Press ENTER to review the waypoint definition page. To delete all user-defined waypoints: 1. Highlight `OPT' tab and press ENTER. 2. Highlight `DELETE ALL' and press ENTER. 3. Highlight the `YES' prompt and press ENTER. To delete waypoints by symbol: 1. Highlight `OPT' tab and press ENTER. 2. Select `DELETE BY SYMBOL' and press ENTER. 3. Select the symbol corresponding to the waypoints you wish to delete. Press ENTER. 4. Press ENTER to confirm the `DONE' prompt, high light the `YES?' prompt, and press ENTER. Delete All Waypoints Locate and Review Waypoint Note: This feature is handy for deleting temporary waypoints created by the TracBack function. Delete Waypoints by Symbol 27 REFERENCE Nearest Waypoints Page The nearest waypoints page shows the nine nearest waypoints that are within 100 miles of your present position, with the bearing and distance noted for each waypoint. This page will also let you retrieve a waypoint definition page or GOTO a selected waypoint right from the list. To review the definition page of a selected waypoint: 1. Highlight the desired waypoint. 2. Press ENTER. To return to the nearest waypoint page: 1. Highlight `DONE?'. 2. Press ENTER. To go to a highlighted list waypoint: 1. Highlight the desired waypoint, and press GOTO. 2. Press ENTER. Main Menu-- Nearest & Proximity Waypoint Pages The compass heading (BRG) and distance (DST) to the nine nearest waypoints are updated continuously. Proximity Waypoint Page The GPS 12CX's proximity waypoint function warns you when you are getting too close to hazardous waypoints. This function allows you to create up to nine proximity waypoints and designate an alarm circle for each waypoint. If you enter this circle, a warning message will alert you. To enter a proximity waypoint from the Main Menu Page: 1. Highlight `PROXIMITY WPTS' and press ENTER. 2. Highlight the first empty waypoint field and press ENTER. The Proximity Alarm will trigger when the distance to the waypoint is smaller than the distance entered in the `DST' field. 3. Use the ROCKER to scroll through stored waypoints until the desired waypoint appears. 4. Press ENTER. The distance (DST) field will be automatically highlighted. Press ENTER and enter the desired distance. 5. Press the ENTER key. To review or remove a proximity waypoint: 1. Using the ROCKER, select a proximity waypoint and press ENTER. 2. Highlight `REVIEW?' or `REMOVE?' and press ENTER. Quickly edit or remove proximity waypoints, by highlighting the waypoint name and pressing ENTER. If `REVIEW?' is chosen, the waypoint page will appear, and you may make any changes to the selected waypoint. If `REMOVE?' is chosen, the proximity waypoint will be removed from the list. Press QUIT or PAGE to return to the Main Menu Page. 28 Selecting a GOTO Destination The GPS 12CX provides four ways to navigate to a destination: GOTO, MOB, TracBack, and Route navigation. The most basic method of selecting a destination is the GOTO function, which lets you choose any stored waypoint as the destination and quickly sets a direct course from your present position. To activate the GOTO function: 1. Press the GOTO key. 2. Select the waypoint that you want to navigate to and press ENTER. REFERENCE GOTO & MOB Once a GOTO waypoint has been activated, the Compass Page or Highway Page will provide steering guidance to the destination until either the GOTO is cancelled or the unit has resumed navigating the active route. To cancel an active GOTO: 1. Press the GOTO key. 2. Highlight the "OPT" tab 3. Highlight `CANCEL GOTO?', and press ENTER. Activating a Direct GOTO Man Overboard Function The GPS 12CX's man overboard function (MOB) lets you simultaneously mark and set a course to a position for quick response to passing positions. To activate the MOB mode: 1. Press GOTO twice. The GOTO waypoint page will appear with `MOB' selected. 2. Press ENTER to begin MOB navigation. Cancelling an active GOTO The GPS 12CX will now guide you to the MOB waypoint until the MOB GOTO is cancelled. If you want to save the MOB waypoint, be sure to rename it because it will be overwritten the next time a MOB is activated. Man Overboard Function 29 REFERENCE TracBack Navigation GARMIN's patented TracBack feature allows you to quickly retrace your path using the track log automatically stored in the receiver. This feature eliminates the need to mark waypoints along the way and manually create and activate a route back to where you began your trip. Once a TracBack route is activated, it will lead you back to the oldest track log point stored in memory, so it's usually a good idea to clear the existing track log at the start of each trip. To clear the track log and define a starting point for a TracBack route: 1. From the Map Page, press ENTER, highlight the `TRACK SETUP' option, and press ENTER. 2. Highlight `CLEAR LOG?', press ENTER, highlight `Yes?', and press ENTER. To activate a TracBack route: 1. Press GOTO, 2. Highlight the `OPT' tab. 3. Highlight `TRACBACK' and press ENTER. TracBack Navigation Clearing the Track Log Once the TracBack function has been activated, the GPS 12CX will take the track log currently stored in memory and divide it into segments called legs. Up to 30 temporary waypoints will be created to mark the most significant features of the track log in order to duplicate your exact path as closely as possible. These points will be indicated by `T###' (e.g., `T001') on the waypoint list, and by a `T' symbol on the Map Page. The active route page will appear, showing a route from your present position to the oldest track log point in memory. Steering guidance to each waypoint will be provided back to the starting point of your track log. You may delete a TracBack waypoint from a route, but only if the route is not active.