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To select the simulator mode:
1. Press MENU to list the options for the Satellite Status Page.
2. Highlight ‘Start Simulator’ with the rocker keypad, and press ENTER.
3. Press ENTER again to acknowledge the simulator warning message.
Let’s look at the sequence of pages again. The PAGE and QUIT keys are used to
find your way around on the GPS III.
To cycle through the main pages:
1. Press PAGE to move through each of the main pages in normal fashion.
2. Press QUIT to sequence through the main pages in reverse order.
In normal mode operation, the GPS III would automatically sequence from
Satellite Status Page to Map Page once enough satellites where received to determine
your position. At that point the receiver is ready to use for navigation. Since we’re
in simulator we won’t see that automatic sequence of steps, but as you cycle through
the main pages, notice that the simulator imitates satellite reception and shows that
information on the Satellite Status Page.
The Position Page will show the last known position as a starting location. If
you’ve already initialized the receiver, as outlined in the Getting Started section, the
starting location should be very close to your current position! We’ll use this start-
ing location from which to begin our simulated trip. Let’s move on to the Map Page
to see where we are, create a destination and explore the navigation features of the
To select the Map Page, press PAGE repeatedly until it appears.
Select ‘Start Simulator’ from
the Satellite Status Page
Options to enable the built-in
The simulator imitates satel-
lite reception and shows that
information on the Satellite
Status Page. Remember, in
this mode the GPS III is not
actually tracking satellites.
Selecting Simulator Mode
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The GPS III’s Map Page combines digital charting with a number of user-selectable
features. Before we select our destination and begin navigating toward it, let’s take a
look at some of those features.
The map display shows your present position using a pointer icon in the center of
the screen. The Map Page also shows any nearby lakes, rivers, highways and towns.
Use the zoom keys (IN and OUT) to adjust the map to the desired scale. The current
scale is indicated in the lower-left corner.
To change the map scale:
1. Press the IN zoom key to select a smaller scale and display a smaller geographic area.
2. Press the OUT zoom key to select a larger scale and display a larger geographic area.
The map can be oriented with the top of the page always pointing north (‘North
Up’), oriented along your desired course (‘Course Up’), or it can automatically rotate
to keep your current direction of travel at the top of the screen (‘Track Up’).
Nearby waypoints are depicted on the map with any one of over 40 different sym-
bols, with the waypoint name displayed directly above the symbol. Let’s create a way-
point directly on the map display to see how that process works, then we’ll navigate
to this new waypoint.
In the ‘Track Up’ orientation,
the map is automatically
rotated to keep your current
direction of travel at the top
of the screen. Note the north
indicator in upper-left corner.
Use the IN/OUT zoom keys
to change the map scale. The
current scale appears in the
lower-left corner of the map
Using the Map Page
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Select a five mile scale by pressing zoom IN or OUT repeatedly.
Working from the Map Page is a simple process that centers around the use of a
reference “arrow”. Controlled by the rocker keypad, the reference arrow is an impor-
tant tool allowing you to pan to other areas on the map display, create waypoints,
view waypoint information and create routes. To get a feel for using the Map Page
and the arrow, try the following exercise:
1. Using the rocker keypad to move the arrow, try following a highway (or other fea-
ture) near your position. Simply press and hold one side of the rocker keypad to
move more quickly. Notice how a data field appears above the map, showing the
bearing and distance from present position to the cursor, along with the latitude/
longitude of the arrow’s position.
2. Using the rocker keypad, move the arrow in any direction approximately five miles
from your present position (the pointer icon) and press ENTER. This procedure
creates a waypoint at the arrow location and displays the Waypoint Edit Page.
3. A three-digit number is pre-assigned to your new waypoint as its name, but we’re
going to change the name. Let’s call this location ‘SIMUL8’. To change the name,
highlight the waypoint name field and press ENTER. Use the rocker keypad to enter
the new name – UP/DOWN to change the first character (‘S’), RIGHT to move to the
next character (‘I’), and repeat. Press and hold UP or DOWN (on the rocker keypad)
to cycle through the characters more quickly. Once the new name is spelled out,
press ENTER to accept it.
Use the rocker keypad to pan
to other areas on the map
display. When panning an
on-screen arrow appears for
reference, along with a data
field above the map.
Place the panning arrow over
an on-screen item to display a
Creating a Waypoint
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4. Now let’s use a special symbol to identify this location. Highlight the waypoint symbol
field, using the rocker keypad, and press ENTER. Use UP/DOWN on the rocker keypad
to select the ‘Information’ icon (‘?’) and press ENTER.
5. To save the new waypoint, highlight ‘Done’ with the rocker keypad and press ENTER.
Now that we’ve created our new waypoint, let’s see how the GPS III is used
to navigate to it. The reference arrow can also be used to GOTO any point on the
map—even without a waypoint already at that location—by simply pressing GOTO.
(We won’t try that here. A waypoint named ‘MAP’ is automatically created, so all the
previous steps for creating and naming a waypoint wouldn’t be needed. You might
want to experiment with this procedure at the end of the Simulator Tour.) For the
Simulator Tour, we’ll stick with the ‘SIMUL8’ waypoint we just created.
To select the GOTO destination:
1. Press GOTO.
2. If the ‘All’ file tab is not selected, use the rocker keypad to highlight this tab. (‘All’ will
display a list of all waypoints currently stored in memory.)
3. Highlight the ‘SIMUL8’ waypoint using the rocker keypad, and press ENTER.
Notice that a course line appears on the map display showing the way to our
destination. Imagine you’re about to depart. Maybe you’re heading out from the mari-
na or you’re about to venture into the wilderness. What if you want to return to your
present position when you’re done for the day? You have two options available:
• You can mark your present position now and save it as a waypoint, or
• You can use the TracBack feature at the end of the day to retrace your
steps – following the same path you travelled, but in reverse.
For now, we’ll mark our present position and save it as a waypoint. (You might
want to experiment with the TracBack feature later. It’s described on page 52.)
You can select a special
symbol to identify the
waypoint on the Map Page.
To select a GOTO destination,
press GOTO and highlight the
desired waypoint on the list.
(You may also need to select
the ‘All’ file tab on the GOTO
Page, to see all waypoints
currently in memory.)
Going to the Waypoint
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To mark your present position:
1. Press and hold the ENTER/MARK key. The Mark Waypoint Page will appear, with a
default three-digit name for the new waypoint in the upper-left portion of the page.
Let’s call our present position ‘HOME’. (If you were at home when you initial-
ized your GPS III, you might want to keep this waypoint in memory for future use!)
To rename the waypoint and change its symbol:
1. Use the keypad to highlight the name field, and press ENTER.
2. Enter the new waypoint name (‘HOME’) using the rocker keypad, and press ENTER.
(Remember to use UP/DOWN to change the character and RIGHT to move to the next
3. Highlight the waypoint symbol field and press ENTER.
4. Select the ‘Residence’ symbol, and press ENTER.
5. Move the cursor to the ‘DONE?’ prompt, and press ENTER.
Now we have two waypoints in memory and on the map: ‘SIMUL8’ and ‘HOME’.
It’s about time we get started, so let’s plug a speed into this simulator to animate the
To enter a simulated speed and animate the displays:
1. Press PAGE repeatedly until the Compass Page appears.
2. Enter a simulated speed of ‘10’ (mph or knots) using the rocker keypad. (Press UP on
the rocker keypad once to select ‘10’. The speed readout is on the upper right corner
of the Compass Page.)
3. Press PAGE (or QUIT) repeatedly to return to the Map Page.
To mark your present position
and save it as a waypoint,
press and hold ENTER. A
three-digit name is automati-
cally assigned to the waypoint.
From the Compass Page you
can increase/decrease the
simulated speed using the
UP/DOWN keys on the
Marking Present Position
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