users. The control segment also ensures that the GPS satellite orbits and clocks remain as designed. A station can track up to 11 satellites at a time. Each station performs this "check-up" twice a day, as the satellites complete their journeys around the earth. Noted variations, such as those caused by the gravity of the moon and sun and the pressure of solar radiation, are passed along to the master control station. The last of the three pieces of the control segment of GPS are the ground antennas. Ground antennas monitor and track the satellites from horizon to horizon. They also transmit correction information to individual satellites. Space Segment The space segment includes the satellites and the Delta rockets that launch the satellites from Cape Canaveral in Florida. GPS satellites fly in circular orbits at an altitude of 10,900 miles (17,500 km) and with a period of 12 hours. The orbits are tilted to the earth's equator by 55 degrees to ensure coverage of the polar regions. Powered by solar cells, the satellites continuously orient themselves to point their solar panels toward the sun and their antenna toward the earth. Each of the 24 satellites, positioned in 6 orbital planes, circles the earth twice a day. The satellites are composed of three major subsystems: Solar Panels, Internal Components and External Components. Solar Panels Each satellite is equipped with solar array panels. These panels capture energy from the sun, which provides power for the satellite throughout its life. Internal Components Internal components are subsystems such as atomic clocks and radio transmitters. Each satellite contains four atomic clocks. These clocks are accurate to a nanosecond or a billionth of a second. The atomic clocks within the satellites are so accurate because even an extremely small time inaccuracy would translate into a extremely large position difference (1/100 of a second inaccuracy translates to a position difference of 1,860 miles to any GPS receiver). External Components The exterior of the GPS satellite has a variety of antennas. The signals generated by the radio transmitter are sent to your Cobra GPS receiver via L-band antennas. Another component of the satellite is the radio transmitter, which generates the signal. Each of the 24 satellites transmits its own unique code in the signal. User Segment You and your Cobra GPS receiver are a part of the user segment along with many other private individuals and military personnel and their GPS receivers. Military GPS equipment has been integrated into fighters, bombers, tankers, helicopters, ships, submarines, tanks, jeeps and soldiers' equipment. GPS is also used on space shuttles. Cutting-edge satellite navigation technology coupled with your Cobra GPS receiver can help overcome many of the hardships and hazards associated with recreation. Your Cobra GPS receiver allows you to go practically anywhere with confidence knowing precisely where you are at all times. With your Cobra GPS receiver, you will be able to record accurately any location and return to that precise spot, time and again, anytime, anywhere.

POWER Button

Using the Buttons and Joystick
You can access all features of your GPS 500 by using three buttons and the joystick. After reading the general explanations below, please refer to Using the Map Page, page 10, to begin using the buttons to operate your unit. The POWER Button Pressing and holding the POWER button for 2 seconds will turn the device on or off.

Turning the Power On

To turn on your GPS 500, press and hold the POWER button for 2 seconds. A start-up screen appears for a few seconds, followed by a screen that shows that the unit is attempting to lock on to signals from GPS satellites. Once three satellite signals have been acquired, the screen will automatically switch to the Map page and the unit is ready to use. NOTE: The unit must be outside with a clear view of the sky to acquire satellite signals for navigation. To turn the power off, press and hold the POWER button for 2 seconds. NOTE: When you use the GPS 500 for the first time, it will take up to approximately 50 seconds to lock on to the GPS satellites.

Power Button

Startup Screen

PAGE Button

With the unit turned on, pressing and releasing the POWER button will turn on the display backlight. The display will remain lit until no buttons have been pushed for 15 seconds (for more details, see page 47). The PAGE Button Pressing and releasing the PAGE button allows you to cycle through the five main pages (described in the next section). If you have proceeded to one of the menus (described later in this manual), the PAGE button is an escape key, allowing you to exit the menu and return to the previous screen. At any time, pressing and holding the PAGE button for 2 seconds will display the Page List menu. From this menu you can go directly to any main page. The JOYSTICK Whenever you see a menu of selections, pushing the JOYSTICK up or down allows you to scroll through the selections displayed. A side scroll bar next to a menu indicates that more selections can be viewed by scrolling beyond the bottom or top of the list that is currently visible. The JOYSTICK is also used to move around the Map page (see page 12).

Powersave Mode

If you wish to save battery power while using just the non-navigational features of your unit, you can turn GPS navigation off. To do so, while still in the Acquiring Satellites screen, highlight using the JOYSTICK and select NO by pressing the ENTER button. To turn GPS navigation off after the screen automatically changes to the Map page, see page 46. In Powersave Mode, no GPS functions will be available until you turn GPS back on. To do so, please refer to page 46. NOTE: You can turn GPS off at any time. Please see Turning GPS Off and On, page 46.

Enter Button

GPS Status Screen

JOYSTICK

continued

Cities/Towns

Track Track Your GPS 500 automatically keeps a record of your travel, called a track. The unit shows you a map-like picture of your track. You can create and store up to 10 different tracks. Each track can be recalled and used for navigation as the unit shows you how to retrace the track again, either forward or in the reverse direction. When traveling in unfamiliar territory, this is a quick and easy way to make sure you always know how to get back to your starting point. Route A route is a series of waypoints which you choose to navigate in a specific sequence. Up to 50 points may be stored in a route. Once you have created a route, your GPS 500 will guide you from point to point. As you reach each point, the unit automatically begins navigating to the next one. Trip Meter Along with the navigational features, the trip meter in your GPS 500 keeps accurate time, allowing it to precisely calculate your speed of travel, average speed throughout your trip and estimated time of arrival (ETA) at your chosen destination. Route

Waypoint

Navigating with the GPS 500
Your GPS 500 receives signals from Global Positioning System satellites that are in fixed orbits (stationary relative to the ground) around the earth. By acquiring or locking on to the signals from at least three satellites, your unit can use triangulation to precisely determine your current position, elevation above sea level and bearing (the direction you are facing). As you travel, the unit automatically acquires the strongest satellite signals available at your current location. By becoming familiar with the units basic operating features, you will be able to use its powerful navigational capabilities.
Waypoint, City/Town or Point of Interest You can create waypoints. A waypoint is a specific location that you ask the unit to record. In this manual, you will learn how to mark your current location as a waypoint, or set the coordinates for a waypoint anywhere in the world. You can create and store up to 500 waypoints. You can ask the unit to show you the direction of travel to an individual waypoint, or how to navigate along a series of waypoints. Already stored in your GPS 500 are coordinates for hundreds of cities throughout the world plus continental U.S. state, Canadian provincial and European country boundaries. You can also select any city/town and ask the unit to show you the direction of travel to that city/town. With optional computer software and interface cable, you can access a computer mapping database to load the coordinates for points of interest (POIs) into your GPS 500. This gives you access to hundreds of points of interest, which you can use as waypoints for navigation. continued

Trip Meter

T H E F I V E M A I N PA G E S

Gauges Page

M A P PA G E

Using the Map Page

Map Page

The Five Main Pages

In the following sections of this manual, you will learn how to use five main pages to access all the features of your GPS 500: Map Page The Map page displays a map of your current position in relation to any waypoints, cities/towns, and points of interest (POI) that you have selected. It can show you the GoTo direction of travel to a selected destination. The Map page also shows you the track that you have traveled along. If you have created a route, the map can show you that route and your current position on it (see page 10). Gauges Page The Gauges page displays a compass that shows your current direction of travel or the direction to your next waypoint. The data field currently showing speed is user-selectable (see page 14). Trip Meter Page The Trip Meter page displays a number of use-selectable fields with information about your current location, the progress you have made, your direction of travel, your speed of travel and the time of your trip (see page 16). Nav Data Page The Nav Data page allows you to store and select waypoints for navigation, use the units automatic tracking feature, and program and recall a route to selected destinations (see page 18). System Page The System page allows you to choose the various settings and formats that the unit uses to navigate and display information (see page 44). NOTE: Whenever satellite lock is lost or GPS is turned OFF, certain animation icons (below) appear on screen and continue to loop until GPS is ON and/or satellite lock is re-acquired (see page 46). Animation sequence that appears when satellite lock is lost Animation sequence that appears when GPS is turned OFF

Map Page

The Map page displays a graphic representation of the navigation currently in progress. You can choose to display or hide any waypoints; cities/towns; continental U.S. state, Canadian provincial and European country boundaries; points of interest; routes or tracks that you are using. A black (triangle) in the middle of the screen indicates your current position and direction of travel. A data field at the bottom of the screen shows you information of your choosing about your position or navigation. You can zoom in and out on the map image by using the ZOOM IN/OUT button. You have a number of options for customizing the display, (details below). Selecting Options From the Map page, press and release the ENTER button to display the Map Page Options menu. Push the JOYSTICK up or down to scroll through the menu sections, then press the ENTER button to go to the highlighted option. Use the JOYSTICK again to highlight your choice, then press the ENTER button to select it. Press the PAGE button to return to the main page. Orient Option Highlight and select ORIENT to designate the orientation of the map display. To make the screen always represent magnetic north, highlight and select NORTH UP (see ). To make the screen always represent the direction of travel, highlight and select TRACK UP (see ). Set Data Option Highlight and select SET DATA to choose the information about your current position or navigation that you want to be displayed at the bottom of the Map page. Highlight and select FULL MAP to show the entire image of the map currently in use (see ). Highlight and select from the following for display at the bottom of the page: Accuracy, Average Speed, Bearing, Date, Destination, Elevation, ETA, Location, Maximum Speed, Odometer, Power, Speed, Time, Trip Odometer, Trip Time (see ). (For more information about the optional data selections, see Data Field Choices Descriptions, page 4). continued

Data Options Stopping Nav
Set Data Option Highlight and select SET DATA to choose the fields you want displayed on the Trip Meter page. (Highlight and select the field you want to change the highlighted field will blink then highlight and select the new field from the menu.) Menu includes: Accuracy, Average Speed, Bearing, Date, Destination, Elevation, ETA, Location, Maximum Speed, Odometer, Power, Speed, Time, Trip Odometer, Trip Time. (For more information about the optional data selections, see Data Field Choices Descriptions, page 4). Stop Nav Option To stop the current navigation, highlight and select STOP NAV. Highlight and select YES to stop. Highlight and select NO to have current navigation continue.* Defaults Option Highlight and Select DEFAULTS to restore all original default Trip Meter page settings. Highlight and select YES to restore original settings to Font Size = Small 5-Field; Data field information = Location, Speed, Trip Odometer, Odometer, Maximum Speed. Highlight and select NO to maintain all current settings.

Nav Data Page

The Nav Data page gives you access to the powerful navigational features of your GPS 500. From this page, you can create and store up to 500 waypoints. For each one, you can choose a name and assign a symbol. Using the navigational features, you can ask the unit to show you the GoTo direction of travel to reach a selected waypoint. The coordinates for hundreds of cities/towns throughout the world are already stored in your GPS 500. You can select any city/town and ask your unit to show you the "GoTo" direction of travel to that city/town. With optional computer software and interface cable, you can connect your GPS 500 to a computer mapping database to access the coordinates for points of interest (POIs). (See Using the Data Interface, page 48.) Once stored in the units memory, points of interest can be used as waypoints for navigation. You can also create and store up to 10 tracks. Your GPS 500 automatically keeps a record of your progress as you travel and gives you a graphic representation of the track you have taken. You can ask the unit to guide you in the reverse direction along the same track. You can select two or more waypoints or points of interest to create up to 20 routes. Your GPS 500 will then show you the way to follow the route accurately. To assist in your navigations, the GPS 500 is already programmed with continental U.S. state, Canadian provincial and European country boundaries. Whenever navigation is in progress, a hiker icon will appear next to the corresponding selection on the main Nav Data page. The data icon and the hiker icon will also appear in the lower right hand corner of the Map page and Gauges page .

Add New Waypoint

Information Screen

Edit Info

Selecting Options From the Nav Data page, highlight using the JOYSTICK and select WAYPOINTS by pressing the ENTER button. Push the JOYSTICK up or down to scroll through the menu sections, then press the ENTER button to go to the highlighted option. Use the JOYSTICK again to highlight your choice, then press the ENTER button to select it. Press the PAGE button to return to the main page. Select Option Highlight and select SELECT to access any waypoint on the list. Highlight and select any waypoint listed on the screen to bring up that waypoints information screen. You may then highlight and select GOTO to display the Map page showing you the direction of travel to the selected waypoint. Highlight and select MAP to display the Map page with the selected waypoint centered. Highlight and select EDIT to edit the name, symbol, location coordinates or elevation of the selected waypoint. Or highlight and select DELETE to delete the selected waypoint. continued

Sort List of Waypoints

Delete Waypoint
Search Existing Waypoint List

Waypoints: Creating New

Waypoints: GoTo

New Waypoint

Creating a New Waypoint
To mark your current location as a new waypoint: Waypoint shortcut: To mark a new waypoint using current location, press and hold the ENTER button for 2 seconds. A confirmation window will pop up. 1. From the Nav Data page, highlight using the JOYSTICK and select WAYPOINTS by pressing the ENTER button. Highlight and select NEW. 2. Highlight and select MARK CURRENT. The waypoint information screen appears. A default name (a 3-digit number) and symbol (a flag) will be assigned. You can either accept the default name and symbol or rename and change the symbol of the waypoint (see "Editing Text," page 41). 3. When you have finished editing your new waypoint, select SAVE to return to the main Nav Data page. To return to the main Nav Data page without saving the new waypoint, press the PAGE button. To enter any location as a new waypoint manually: 1. From the Nav Data page, highlight using the JOYSTICK and select WAYPOINTS by pressing the ENTER button. Highlight and select NEW.

GoTo a Selected Waypoint

To make the map show the navigational path to a selected waypoint: 1. From the Nav Data page, highlight using the JOYSTICK and select WAYPOINTS by pressing the ENTER button. Highlight and select SELECT. 2. Highlight and select the waypoint you want to navigate or GoTo. The waypoint information screen for that waypoint appears with four selections: GoTo, Map, Edit and Delete. 3. Highlight and select GOTO to navigate to your selected waypoint. This will bring up the Map page with the GoTo path between your current position and the selected GoTo waypoint. While in the Gauges page, a navigation or GoTo is illustrated by a flag and hiker icon in the bottom right hand corner of the screen. Also, your selected GoTo waypoint and distance to that waypoint are shown above the compass.

Selecting Stored Waypoint

Current or Manual

Select Waypoint

Waypoint Information

Return to Nav Data Page
2. Highlight and select MANUAL. The waypoint information screen appears. A default name (a 3-digit number) and symbol (a flag) will be assigned. You can either accept the default name and symbol or rename and change the symbol of the waypoint (see "Editing Text," page 41). The Location field will blink. 3. Enter the location (latitude and longitude) of your new waypoint (see "Editing Text," page 41). 4. Highlight ELEVATION, the field will blink. Enter the location's elevation (see "Editing Text," page 41). NOTE: ELEVATION does not need to be entered to save your new waypoint. 5. When you have finished editing your new waypoint, select SAVE to return to the main Nav Data page. To return to the main Nav Data page without saving the new waypoint, press the PAGE button.

GoTo on Map Page

GoTo on Gauges Page

Tracks: Summary

View Stored Tracks

Tracks

When you select TRACKS from the Nav Data page (see ), your GPS 500 will display a list of the tracks currently stored. Your unit will automatically record a track as you travel. You can store up to 10 tracks and later recall any of those tracks to use for navigation. Your unit can guide you along a selected track in either direction. While you are navigating a track, a flashing hiker icon will appear next to that track on the track list. Selecting a track currently being navigated will let you view information such as your current location in relation to the track and ETA (see Navigate a Selected Track, page 25). NOTE: Your GPS 500 automatically begins tracking your travel whenever it is turned on and linked to satellites. It keeps the recorded travel stored in its log even when the power is turned off, starting a new tracking "session" when it is turned back on. Old tracks will remain in memory (2,000 tracking points) unless erased by user (see "Deleting Individual Waypoints, Tracks, Routes or POIs," page 40). Selecting Options From the Nav Data page, highlight using the JOYSTICK and select TRACKS by pressing the ENTER button to display the Tracks screen. Use the JOYSTICK to scroll through the list of tracks, then press the ENTER button to go to the highlighted track. Use the JOYSTICK again to highlight your choice, then press the ENTER button to select it. Press the PAGE button to return to the main page. Log Option Highlight and select LOG to save the current track or scroll to recall a track saved previously. Highlight and select SAVE to save either the THIS SESSION (the travel recorded since the unit was last turned on) or the ENTIRE LOG (all travel recorded since the log was last cleared) (see CLEAR below). You can either accept the default name (the current date) or rename the track before saving (see Editing Text, page 41). Highlight and select CLEAR to clear the log of all travel that has been recorded. The unit automatically restarts recording your travel. continued

Highlight Waypoint

Add Waypoint
Overwrite Display New Existing Route Route List
3. Highlight and select INSERT WAYPT or INSERT POI to add a point (waypoint or point of interest) to the route. The list of available points appears. continued

Edit Menu

Display Waypoints

Routes: Editing

Route List

Editing a Route

Inserting a Waypoint/POI into a Route
To add a waypoint or point of interest to an existing route: 1. From the Nav Data page , highlight and select ROUTES. Highlight and select the route you wish to add a point to. The selected routes screen appears. 2. Highlight and select EDIT. The Edit Route screen appears with all current points in the route displayed. 3. Highlight and select the point that will come immediately before the one you want to add. The Edit menu appears.
Remove a Waypoint/POI from a Route
To remove a waypoint or point of interest from an existing route: 1. From the Nav Data page, highlight and select ROUTES , then highlight and select the route you wish to remove the point from. The selected routes screen appears. 2. Highlight and select EDIT. The Edit Route screen appears with all current points in the route displayed. 3. Highlight and select the point you wish to remove. The Edit screen appears. 4. Highlight and select REMOVE. The Edit Route screen appears with the selected point removed. Repeat steps 3 and 4 to remove other points on the route. 5. When you have finished editing your route, highlight and select any point. Highlight and select DONE. Press the PAGE button to return to the main Nav Data page.

Add Point to Route

Edited Route List

Select Edit

Routes Current Points
4. Highlight and select INSERT WAYPT or INSERT POI to add a point (waypoint or point of interest) to the route. The list of available points appears. 5. Highlight and select SELECT. The first point on the list is highlighted. 6. Push the JOYSTICK up or down to highlight the point you want to add to your route. You can sort or search the list (see "Sort," page 42 or "Search, page 43.) 7. Press the ENTER button to add the highlighted point to your route. The Edit Route screen appears with the added point displayed.

Highlight Done

Highlight Insert
Repeat steps 4 to 7 to edit other points on the route. Highlight Point 8. When you have finished editing your route, highlight and select any point. Highlight and select DONE. Press the PAGE button to return to the main Nav Data page. continued

Highlight Remove

Joystick

Routes: Navigate

Routes: Navigation Information
Navigate a Selected Route
To make the map show the navigational path along a selected route: 1. From the Nav Data page, highlight using the JOYSTICK and select ROUTES by pressing the ENTER button. 2. Highlight and select the route you want to navigate. A map of the selected route appears with selections: Navigate, Edit and Delete. 3. Highlight and select NAVIGATE to navigate through your selected route. To begin navigation, highlight and select your desired start point. 4. Your selection will bring up the Map page with the route path shown. NOTE: A flashing hiker icon on the Nav Data page indicates that a route is currently being navigated. While in the Gauges page, Route navigation is illustrated by a group of flags and hiker icon in the bottom right-hand corner of the screen. Also, the next point on your route navigation and the distance to that point are shown above the compass.

Select SORT

Waypoint Sort Options

Continue Editing

Blank Space

POI Sort Options

Select symbol

Search Option

S Y S T E M PA G E

Using the System Page

Select SEARCH

Search Screen

To search any list of waypoints or points of interest for a particular name: 1. From any screen with the SEARCH option, highlight and select SEARCH. 2. Select (by pressing the ENTER button) the highlighted blank space to enter the first letter of the name you are searching for (see Editing Text, page 41). 3. The waypoints or POIs containing that letter first appear at the top of the list. Choose from the following: Continue to enter letters into the blanks until the waypoint you are searching for appears highlighted at the top of the list . Accept the current highlighted waypoint. Scroll to select the waypoint you are searching for. 4. Continue your previous activities.

System Page

The System page gives you various options for changing the system settings used by your GPS 500. From this page you can turn GPS navigation on and off, and adjust the settings for the display, sounds, time, compass, map, method of navigation, etc. You can also turn on your GPS 500s data port to enable data exchange with computer mapping software. (Optional accessories, not included, are required. See Using the Data Interface, page 48.) Selecting Options From the System page, push the JOYSTICK up or down to scroll through menu selections, then press the ENTER button to go to the highlighted option. Use the JOYSTICK again to highlight your choice, then press the ENTER button to select it. Press the PAGE button to return to the main page. Satellites To turn GPS navigation on and off, highlight and select SATELLITES, (see "Turning GPS Off and On," page 46). Highlight and select GPS MODE. Highlight and select YES or NO in response to the prompt to access your units navigational features or to disable your units navigational features. (Turning GPS mode off preserves battery power.) Display Options Highlight and select DISPLAY to adjust Contrast, Backlight or Battery saver settings (see Adjusting the Display, page 47). Highlight and select CONTRAST which allows display contrast to be increased or decreased. Highlight and select BACKLIGHT to change the length of time the backlight remains lit. Highlight and select BATTERY SAVER to turn on or off battery conservation. Interface Option Highlight and select INTERFACE to activate the data port for interface with a computer (see Using the Data Interface, page 48). Highlight and select DATA PORTON to activate the data port. Highlight and select DATA PORTOFF to deactivate the data port. Highlight and select DATA PORTNMEA to activate the data port with a direct connection to a computer running a GPS-compatible software resulting in a real-time display of your position on the computer screen. Settings Option Highlight and select SETTINGS to change the following system settings: Clock Format, Time Zone, Daylight Savings (Summer Time), Language, Measurement Units, Sounds (see Using the Settings Screen, page 49).

Sounds

First Data Field Blinks

Clock Format

To turn the units sound on or off, select SOUNDS. Press the ENTER button to bring up the menu. Select ON or OFF. 4. To save the changes made, highlight and select SAVE. To exit this function without saving changes, press the PAGE button.

Sound On/Off

Return to System Page

Time Zone

Daylight Savings
To have the clock use daylight saving time (Summer Time), highlight DAYLIGHT SAVING. Press the ENTER button to bring up the menu. Select AUTO to make the clock switch to daylight saving time (Summer Time) automatically. Select ON to switch manually back to daylight saving time (Summer Time). Select OFF to switch manually the clock to standard time (Winter Time (GMT)). continued

Advanced Screen

Select Data Fields
Using the Advanced Screen
From the Advanced screen, you can change the advanced operational parameters used by your GPS 500. To change advanced parameters: 1. From the System page , push the JOYSTICK up or down to highlight and select ADVANCED by pressing the ENTER button. A menu of advanced parameters appears. SELECT will be highlighted. 2. Press the ENTER button and the title of the first data field will begin to blink. Highlight field you wish to change (highlighted field will blink).

Position Format

Location Coordinates

Set Orientation

WAAS On/Off
3. Choose from the following. (You only need to select the settings you want to change.)
To change the format the device uses to display location coordinates, highlight POSITION FORMAT. Press the ENTER button to bring up the menu select from the following: hddd.ddddd (degrees, decimal degrees), hdddmm.mm (degrees, minutes, decimal minutes), hdddmmss.s (degrees, minutes, seconds, decimal seconds), British Grid, Dutch Grid, Finnish KK127 Grid, German Grid, Irish Grid, Maidenhead, MGRS (Military Grid Reference System), New Zealand, Qatar Grid, Swedish Grid, Swiss Grid, Taiwan Grid, User Defined Grid, UTM/UPS (Universal Transfer Mercator/Universal Polar Stereograph), W Malaysian R.

North Reference

System Information
To turn the units WAAS receiver on or off, highlight WAAS (see What is WAAS, page 57.) Press the ENTER button to bring up the menu. Select ON or OFF.

E172.50 to W172.50..-12 IDLW (International Date Line West) W172.50 to W157.50..-11 Nome W157.50 to W142.50..-10 Honolulu W142.50 to W127.50..-9 Yukon Standard W127.50 to W112.50..-8 Los Angeles W112.50 to W097.50..-7 Denver W097.50 to W082.50..-6 Chicago W082.50 to W067.50..-5 New York W067.50 to W052.50..-4 Caracas W052.50 to W037.50..-3 Rio de Janeiro W037.50 to W022.50..-2 Fernando de Noronha W022.50 to W007.50..-1 Azores Island W007.50 to E007.50.GMT + 0 London 55
When GPS is turned Off Whenever GPS is turned Off, the following animation sequence occurs and continues to loop until search is activated by user.
Also, all data fields (except for power status data fields) appear blank until GPS is turned On and satellite lock is re-acquired.

What is WAAS?

Wide Area Augmentation System (WAAS) is a GPS-based navigation system that provides precision above and beyond what GPS can do on its own. WAAS was designed to improve the accuracy and ensure the integrity of information coming from GPS satellites. WAAS is a network of 25 ground reference stations that cover the entire U.S. plus parts of Canada and Mexico. Implemented by the Federal Aviation Administration (FAA) for aviation users, these reference stations are located at precisely surveyed spots and compare GPS distance measurements to known values. When the WAAS signal is available, WAAS-capable receivers typically have a much higher accuracy than non-WAAS units.

About North Reference

The vertical grid lines on any map can be aligned in one of three different ways. True North means that the vertical lines are aligned with the geographic north pole. This is the most common method of orienting maps. Magnetic North means that the vertical lines are aligned in the direction indicated as north by a compass, which can differ from True North to varying amounts, depending on where you are on the earth. (This difference is called inclinationand declination.) Grid North refers to the direction in which the straight lines on a map are actually aligned, which may be slightly different from True North, because the rounded surface of the earth can not be accurately depicted on the flat surface of a map.

What is a Map Datum?

Maps and charts are essentially grids created from a starting reference point called a datum. Many maps being used today were originally created decades ago. Over the years, technology has allowed us to improve our surveying skills and create more accurate maps. However, there is still a need to adapt GPS receivers to use with older maps. Most navigational charts and maps will have the datum listed. Cobra GPS receivers include up to 100 map datums that allow you to switch to a setting that matches your map. The most common US map datums are World Geodetic System 1984 (WGS 84) North American Datum 1983 (NAD 83) and North American Datum 1927 (NAD 27). NOTE: Using a map datum that does not match the chart you are using can result in significant differences in position information.

Reset Option, Trip Meter..16 Remove POI from Route.26, 30 Remove Waypoint from Route..26, 30 Route..8, 26-32 Route Details..32
Nautical Measurement..50 Nav Data Page.9, 18-43 Navigate Option Cites/Towns..33, 34 Points of Interest..35, 37 Route.26, 31 Track..24, 25 Waypoints..19, 22 Navigation..1, 7-8, 18 Nearest Option..33 New Option Route..27-28 Waypoints..20, 21 NMEA..44, 48 North Reference.45, 52, 57 North Up...10
Satellites..44, 53, 56 Save Track Log..23 Search Option..20, 33, 36, 43 Select Option City/Town..33 Point of Interest..35 Route..26 Track..24 Waypoint.19 Service..60 Set Data Option Gauges..15 Map..10 Trip Meter.17 Settings Option.44, 49-50 Sort Option..20, 36, 42 Sounds..44, 50 Spanish Manual.A1 Specifications..59 Speed..4, 10, 15, 17 Status Bar..45

Hiker Icons..18

Editing Text..41 Edit Point of Interest..35 Route...26 Track..24 Waypoint..19 Elevation.4, 10, 15, 17 English Measurement.50 Enter Button..A2, 6 Errors..56 ETA..4, 10, 15, 17
Important Information..A1 Inserting in Route Waypoint.26, 29 Point of Interest..26, 29 Installing Batteries..5 Interface Option..44, 48 Interference..56 Italian Manual..A1
Cardinal Compass..51 Cautions and Warnings..A1 Cities..7, 33-34 Clear Track Log..23 Clock Format..44, 49 Compass..14, 45, 51 Contrast.44, 47 Course..14 Create New Route..27-28 Customer Service..A1, 60
Units of Measurement.44, 50 Using the Advanced Screen.51-52 Using the Settings Screen.49-50
WAAS..45, 51, 57 Warnings and Cautions..A1 Warranty...63 Waypoint Shortcut..6, 20, 21 Waypoints..7, 19-22 WGS 84...51 Winter Time.49

Joystick..A2, 5

Odometer..4, 10, 15, 17 Order Form..64 Orientation Option..10
Language..44, 50 Location..4, 10, 15, 17 Location Screen..44, 46 Log Option, Tracks..23 Lost Satellites.9, 46, 56 Low Battery.54
Data Fields Descriptions..4 Data Interface..44, 48 Data Port..44 Date..4, 10, 15, 17
Factory Service..60 FCC Compliance Statement.. A1 Features..A3 Five Main Pages..9 Font Size Option, Trip Meter.16
Page Button..A2, 5 Panning Mode..12
Zoom In/Out Button.A2, 6 Zoom Option..11
A C C E S S O R I E S WA R R A N T Y D O C

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Make check or money order payable to: Cobra Electronics 6500 West Cortland Street Chicago, IL 60707 USA ATTN: Accessories Dept.
To order online, please visit our website at: www.cobra.com
warrants that its Cobra GPS 500, and the component parts thereof, will be free of defects in workmanship and materials for period of one (1) year from the date of first consumer purchase. This warranty may be enforced by the first consumer purchaser, provided that the product is utilized within the U.S.A. Cobra will, without charge, repair or replace, at its option, defective GPS 500, products or component parts upon delivery to the Cobra Factory Service Department, accompanied by proof of the date of first consumer purchase, such as a duplicated copy of a sales receipt. You must pay any initial shipping charges required to ship the product for warranty service, but the return charges will be at Cobra's expense, if the product is repaired or replaced under warranty. This warranty gives you specific rights, and you may also have other rights which vary from state to state.
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Allow 2-3 weeks for delivery. Offer valid in Continental U.S. only. For accessories or orders outside the U.S., please contact your local dealer.
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The Cobra line of quality products includes:
CB radios microTALK radios Radar/Laser Detectors GPS Safety Alert Traffic Warning Systems Accessories HighGear Accessories VHF Marine Radios Power Inverters
For more information or to order any of our products, please visit our website:

www.cobra.com

Mapdata 2002 Rand McNally & Company Printed in China Part No. 480-037-P revise 8.Cobra Electronics Corporation 6500 West Cortland Street Chicago, IL 60707 USA