Garmin Gps Plus 2 Manual
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Fig. 15a Fig. 15b 15 Getting Started Tour Map Page The GPS II +Õs next page, the Map Page, shows your movement as a real-time track log (an electronic breadcrumb trail that ÒflashesÓ at a map scale of less than 5 miles), and your present position as a diamond icon in the center of the map. Use the zoom keys (IN and OUT) to change the map scale until you see the waypoint you just created (ÔHOMEÕ). WeÕll cover more about this page in the reference section. 1. Now turn approximately 90¼ to your right and continue walking at a fast pace for another 2-3 minutes. Notice how the display changes, always keeping the direction you are moving at the top of the map (Fig. 15b). gps ii + 8/4/98 3:28 PM Page 15
Fig. 16a Fig. 16b 16 Getting Started Tour Going To a Waypoint Once youÕve stored a waypoint in memory, you can use the GPS II +to guide you to it by performing a simple GOTO. A GOTO is really nothing more than a straight- line course from your present position to the destination youÕve selected. To see how it works, letÕs try navigating back to our starting position, the HOME waypoint. To select a GOTO destination: 1. Press GOTO. 2. Highlight the ÔHOMEÕ waypoint, (Fig. 16a) and press ENTER. YouÕll notice that youÕll automatically return to the Map Page, and a straight line will connect your current position to the position of the GOTO waypoint (16b). To continue the tour, letÕs move on to the next page: 1. Press PAGE. gps ii + 8/4/98 3:28 PM Page 16
Fig. 17a Fig. 17b 17 Getting Started Tour Compass Page Whenever you select a destination waypoint, the GPS II +provides graphic steer- ing guidance with the Compass Page (the default navigation page). The Ôcompass ringÕ in the middle of the page shows your direction of travel while youÕre moving (indicated by the top of the ring), and the pointer arrow points to your destination (selected waypoint). As you move toward ÔHOMEÕ, notice how the compass ring and the pointer arrow provide a clear picture of the direction youÕre moving and the direction of ÔHOME.Õ The bearing and distance to a waypoint are displayed at the top of the screen, and your current track and speed are shown below. The default ÔETEÕ field, at the bottom of the screen between the ÔtrackÕ and ÔspeedÕ fields (Fig. 17a), is a user-selec- table field that can provide a variety of navigation information. WeÕll cover more about that field in the reference section (see page 55). As you get close to ÔHOMEÕ, youÕll be alerted to press PAGE. The GPS II +will give you the message ÒApproaching HOMEÓ (Fig. 17b). Once youÕve arrived, youÕll notice the distance field will read 0.00. gps ii + 8/4/98 3:28 PM Page 17
Fig. 18a Fig. 18b 18 Getting Started Tour Menu Page YouÕve already seen the first four pages in action by acquiring satellites, marking a position, and navigating to a destination. The last page available from the main page sequence is the Menu Page (Fig. 18a), which provides access to the GPS II +Õs waypoint management, route, and setup features. To view the Menu Page : 1. Press PAGE. To select a menu option: 1. Highlight the desired field, and press ENTER (18b). To return to the Menu Page: 1. Press QUIT. gps ii + 8/4/98 3:28 PM Page 18
Fig. 19a Fig. 19b 19 Getting Started Tour Clearing the Track Log After youÕve practiced and used the GPS II +for a few trips, you may find that your map display has become cluttered with track plots. To get a feel for how the map and track features work, letÕs clear the track log (the plot points left on the Map Page) weÕve just created during the Getting Started tour. To clear the track log: 1. Scroll to the Map Page, and press ENTER. 2. Highlight the Ôtrack setupÕ field, and press ENTER. 3. Highlight the Ôclear log?Õ field (Fig. 19a), and press ENTER. 4. Highlight ÔYes?Õ, and press ENTER. Congratulations! YouÕve just completed the Getting Started Tour! You now know enough about the GPS II+to go out and have some fun with it. We strongly recom- mend that you read on and explore the Reference section, which contains a closer look at all of the exciting features of the GPS II +. To turn your GPS II +off: 1. Press and hold the red power key (Fig. 19a). The unit will count down for three seconds and then turn off. gps ii + 8/4/98 3:28 PM Page 19
Fig. 20a Fig. 20b 20 Reference Satellite Page The GPS II +Õs Satellite Page provides a visual reference of satellite acquisition and position. As the receiver locks onto satellites, a signal strength bar will appear for each satellite in view, with the appropriate satellite number (1-32) underneath each bar. The progress of satellite acquisition is shown in three stages: ¥ No signal strength barsÑ the receiver is looking for the satellites indicated. ¥ Hollow signal strength barsÑ the receiver has found the satellite(s) and is collecting data (Fig. 20a). ¥ Solid signal strength barsÑ the receiver has collected the necessary data and the satellite(s) is ready for use. Each satellite has a 30-second data transmission that must be collected (hollow bar status) before that satellite may be used for navigation (solid bar status). Once a fix has been calculated, the GPS II +will then update your position, track, and speed by selecting and using the best satellites in view. You can also access the GPS II+Õs contrast feature from this page (see p. 75). To adjust the screen contrast: 1. Press the rocker keypad, adjust the level of contrast (Fig. 20b), and press ENTER. gps ii + 8/4/98 3:28 PM Page 20
Fig. 21a Fig. 21b 21 Reference 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 birdÕs-eye view of the posi- tion of each available satellite relative to the unitÕs last known position. The outer cir- cle represents the horizon (north up); the inner circle 45¼ above the horizon; and the center point 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 a Ô2D NAVÕ or Ô3D NAVÕ in the status field) (Fig. 21b). You can also set the sky view to a track up configuration by changing the ÒorientationÓ option on the Map Page. (See p. 67 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 hollow signal strength bar will appear, indicating that the satellite has been found and the receiver is collecting data from it (Fig. 21a). The satellite number in the sky view will no longer appear highlighted. As soon as the GPS II +has collected the necessary data to calculate a fix, the status field will indicate a 2D or 3D status. gps ii + 8/4/98 3:28 PM Page 21
Fig. 22a Fig. 22b 22 Reference Receiver Status and EPE 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: SearchingÑthe GPS II +is looking for any available satellites in view (Fig. 22a). AutoLocateÑthe GPS II + is initializing and collecting new almanac data. This process can take 5 minutes, depending on the satellites currently in view. AcquiringÑthe receiver is collecting data from available satellites, but has not collected enough data to calculate a 2D fix. 2D NavigationÑat least three satellites with good geometry have been locked onto and a 2-dimensional position fix (latitude and longitude) is being calculat- ed. Ô2D Diff Õ will appear when you are receiving DGPS corrections in 2D mode. 3D NavigationÑat least four satellites with good geometry have been locked onto, and your position is now being calculated in latitude, longitude and alti- tude. Ô3D Diff Õ will appear when you are receiving DGPS corrections in 3D mode. Poor GPS CoverageÑthe receiver isnÕt tracking enough satellites for a 2D or 3D fix due to bad satellite geometry (Fig. 22b). gps ii + 8/4/98 3:28 PM Page 22
Fig. 23a Fig. 23b 23 Reference Not UsableÑthe receiver is unusable, possibly due to incorrect initialization or abnormal satellite conditions. Turn the unit off and back on to reset, and reini- tialize the receiver if necessary. SimulatorÑthe receiver is in simulator mode (Fig. 23a). EZinitOption Prompt The Satellite Page also provides access to the EZinitprompt whenever a position fix has not been calculated (Fig. 23b). (The unit must be in searching, AutoLocate, acquiring, simulator, or poor coverage mode.) This allows you to reinitialize the unit (see p. 7), and is useful if you have traveled over 500 miles with the receiver off and must initialize your new position. (The EZinitprompt 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 indoors.) gps ii + 8/4/98 3:28 PM Page 23
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 unitÕs batteries (Fig. 24). The battery indicator will not appear if the receiver is operating off external power. The battery level indicator is calibrated for alkaline batteries. Ni-Cad and lithium batteries will display the battery level differently due to voltage differences. No other receiver functions are affected. The GPS II+features an internal 10-year lithium battery that will maintain the unitÕs memory when the receiver is not running off batteries or external power. 24 Reference Fig. 24 #! gps ii + 8/4/98 3:28 PM Page 24