Navman 500, 500i User Manual

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Navman 500, 500i User Manual

NAVMAN

Contents

1.0

Tracker500/500i Introduction ...................................................................

3

 

1.1

The Global Positioning System (GPS) ................................................................

3

 

1.2

Commonly Used Terms .......................................................................................

3

 

1.3

Operating the Tracker500/500i ..........................................................................

4

2.0

Overview ....................................................................................................

6

3.0

Man Over Board (MOB) Function ..............................................................

7

4.0

Start-up Sequence ....................................................................................

8

 

4.1

Satellite Status Screen .......................................................................................

8

 

4.2

Acquisition Period ..............................................................................................

9

5.0

Moving Around the Screens ...................................................................

10

 

5.1

Menus ...............................................................................................................

10

 

5.2

Changing Names or Numeric Values within data fields ..................................

10

 

5.3

Screen Summary .............................................................................................

11

6.0

Trackplot Screen .....................................................................................

12

7.0

Position Screen .......................................................................................

13

8.0

Highway Screen ......................................................................................

14

9.0

Fuel Screen (Tracker500i only) ..............................................................

15

 

9.1

Fuel used reset ................................................................................................

16

 

9.2

Fuel used calibration (Transducer calibration) ...............................................

17

 

9.3

Fuel remaining change .....................................................................................

18

 

9.4

Fuel remaining low alarm .................................................................................

18

10.0

GoTo ..........................................................................................................

19

11.0

Waypoints ................................................................................................

20

 

11.1

Waypoints Screen ...........................................................................................

20

 

11.2

Creating Waypoints ..........................................................................................

21

 

 

Creating a New Waypoint .............................................................................

21

 

 

Saving the current boat position ...................................................................

21

 

 

Saving the current cursor position ...............................................................

22

 

11.3

Viewing Waypoint Details ................................................................................

22

 

11.4

Changing Waypoint Details ..............................................................................

23

 

11.5

Displaying a Waypoint ......................................................................................

24

 

11.6

Deleting a Waypoint .........................................................................................

24

 

11.7

Distance Calculations .......................................................................................

25

Tracker500/500i User Manual

T500i/ENG/1F

1

12.0

Marks .......................................................................................................

26

 

12.1

Converting Marks to Waypoints .......................................................................

26

13.0

Routes ......................................................................................................

27

 

13.1

Creating a New Route ......................................................................................

27

 

13.2

Adding and Deleting Waypoints in a Route .....................................................

28

 

13.3

Starting and Cancelling Routes ........................................................................

29

 

13.4

Deleting a Route ...............................................................................................

30

14.0

Setup ........................................................................................................

31

15.0

Chart Datums ...........................................................................................

33

Appendix A – Specifications ............................................................................

36

Appendix B – Tracker500/500i Installation .....................................................

37

Appendix C – Trouble Shooting Guide .............................................................

39

2

Tracker500/500i User Manual

1.0 Tracker500/500i Introduction

Congratulations on purchasing a Navman Tracker500/500i track plotter. The Tracker500/ 500i is a compact, ruggedly built, highly integrated navigation instrument that has been designed for ease of use. With this instrument you will be able to display your boat’s position, track and destination. Complex navigation functions can be performed with a few simple key presses, taking the hard work out of navigation. Tracker500i owners have the option of using the integrated fuel computer to keep track of their boat’s fuel usage. The fuel computer is suitable for all petrol engine boats, either inboard or outboard, and single or twin engine. Fuel transducers must be purchased separately.

1.1 The Global Positioning System (GPS)

The GPS constellation comprises 24 satellites orbiting the earth, providing a worldwide system for determining position. From any one point on the earth’s surface up to 12 satellites are “visible” to the GPS receiver. The positions of these satellites are constantly changing. The Tracker500/500i antenna tracks all visible satellites simultaneously and selects four or more satellites that produce the optimum geometry and signal quality for determining an accurate value of the boat’s latitude and longitude. The superior performance achieved with the Tracker500/500i 12 channel receiver provides increased accuracy and reduced Time to First Fix (TTFF).

Note: The USA Department of Defence introduces a varying offset, known as Selective Availability (SA), to degrade the accuracy of the civilian GPS signal. As an approximate guideline it is generally assumed that the accuracy obtained with SA active causes the GPS derived position to be within 100 metres of the true position 90% of the time and within 50 metres of the true position 50% of the time. On brief occasions the SA can cause the position error to exceed 300 metres.

The constantly varying SA offset causes small errors in the indicated boat speed and heading that may be noticeable at speeds of 5 knots or less. The position, speed and heading errors have been deliberately designed into the system and affect all GPS receivers in the same way. They can be eliminated by connecting a differential (DGPS) receiver to the Tracker500/500i. This receives corrections from a fixed base station that is able to measure the introduced SA offset.

In times of military conflict, the USA Department of Defence has been known to turn the civilian GPS signal off. This is an extremely rare event, but should be guarded against by always having a secondary means of navigation to fall back on. The warning screen that appears each time the Tracker500/500i is turned on has a reminder to this effect.

1.2 Commonly Used Terms

Waypoints Positions such as fishing spots, favourite anchorages, dive locations and trip destinations can be saved in the Tracker500/500i memory. These are referred to as waypoints. Up to 500 waypoints can be stored in memory. The Tracker500/ 500i will automatically allocate a name to a waypoint or the user can specify a name. Waypoints are created by saving the boat position, saving the screen cursor position or by entering the latitude and longitude of a location.

Marks Marks are temporary waypoints. They are created by a single press of the power on/off key. Marks can be created at any time, regardless of the screen currently

Tracker500/500i User Manual

3

displayed. Pressing the Mark key will save the current boat position with a temporary name in the range of MARK0 to MARK9. Marks are saved separately from normal waypoints. They are simpler to create and display and are intended to provide a simple method of marking temporary locations such as fish strikes. See section 12.0 Marks for a more detailed description.

Route Two or more waypoints can be linked in sequence to form a route. The route has a start and end waypoint and can be traversed from start to finish or in reverse. Up to 20 routes can be stored in memory.

Legs Legs are the division of a route between waypoints. A route consisting of four waypoints will have three legs.

GoTo The Goto function allows you to navigate from your current position to any waypoint or mark. The Tracker500/500i will guide you to your destination with a graphical highway screen and continuously updated navigational data.

1.3 Operating the Tracker500/500i

You can use your Tracker500/500i to get you back to a good fishing spot or to sail all the way around the world. It has been designed to be easy to use for those with no formal navigation training, but also provides accurate navigational information for the long distance sailor. No matter how long or short your journey, it will take you straight to where you want to go.

If your main interest is in returning to previously visited locations such as good fishing spots, you should start by reading section 11.2 on saving the current boat position as a waypoint, then section 10.0 on how to “goto” a waypoint. It is normally advisable to take the time to enter a descriptive name for the waypoint as it quickly becomes difficult to remember which is which when the number of waypoints has built up. Be sure to save the position of the launching ramp before you start out so that you can use the Tracker500/500i to find your way back if there is fog, rain, or it gets dark on the return journey. This also applies to any point on your outward journey where you have to change course, such as a channel between two islands.

Note the warning in section 1.1 on the position errors introduced by SA. If you do not have a differential (DGPS) receiver, don’t try and navigate through narrow channels in reduced visibility or darkness unless you have a secondary method of determining a safe course, such as a marine chart and a depth sounder.

Working With Charts

If you want to navigate to a location that you don’t already have saved as a waypoint, you will need to obtain its latitude and longitude from a marine chart. See section 11.2 on how to create a new waypoint and enter Lat/Lon values. A pair of dividers is normally used to measure latitude and longitude on a chart. To measure the latitude of a location, place one point of the dividers on the location and then adjust the dividers until the other point is straight above or below the first one and on the nearest horizontal grid line. Move the dividers along the grid line to the latitude scale on the side of the chart. Put one point on the grid line and the other on the latitude scale and read the value. It will be a number like 43°52·13´ N. A minute (´) is one sixtieth of a degree. The N indicates this location is in the northern hemisphere. Unless you have a chart that covers a very small area, you won’t be able to read the latitude scale more accurately than two decimal places of minutes. The Tracker500/500i allows for three decimal places, so just put zero in the last place. The same method is used to measure the longitude, using a vertical grid line and the longitude scale at the top or bottom of the chart. The longitude will be a number like 010°32·95´ E. Three

4

Tracker500/500i User Manual

digits are used for the degrees as longitudes can be as large as 180°. The E indicates this location is east of Longitude 000°, a vertical line through Greenwich (London). If you don’t have a pair of dividers, you can use a ruler or even two pencil marks on the edge of a strip of paper.

When entering the Lat/Lon of a waypoint from a chart, it is essential that the Tracker500/ 500i is set to the same Lat/Lon datum that the chart uses (see section 15.0 Chart Datums). This also applies if you are plotting the current boat position onto a chart. The datum will be given in the chart’s title block.

If you use waypoints from a chart, it is a good idea to clearly mark the waypoints on the chart. Then, before you start navigating to a waypoint, you can draw a straight line from the boat’s current position to the waypoint and check that it doesn’t pass too close to any rocks or shoals. A similar idea is to enter any isolated rocks in your area as waypoints with the rock symbol ( ). When you start navigation to a waypoint, the Tracker500/500i draws a line from the current boat position to the waypoint on its Trackplot screen. By looking at this screen you can check whether your intended course passes too close to any isolated rocks.

Fuel Functions

The fuel computer functions available in the Tracker500i enable you to keep track of how much fuel you have used, how much you have remaining, the rate at which fuel is being consumed, and how far you are travelling for every litre or gallon of fuel used. All this information is shown on one screen. The fuel used value can be cleared to zero at any time so that you can keep track of the amount of fuel used for each trip, or for each season, or since you bought the boat, according to your preference. The fuel remaining value, on the other hand, must be updated each time you refuel so that you always know how much fuel is left in the tank. There is a low fuel alarm associated with the fuel remaining value that can be set to warn you when the fuel in the tank falls below the alarm level. You can set the alarm level to suit the size of the boat’s engine and the distance you intend to travel.

The fuel consumption (titled FLOW on the screen) in litres or gallons per hour is shown. For twin engine installations, the consumption for each engine is shown separately. This is useful for checking that both engines are under the same load.

As the Tracker500i has both boat speed and fuel consumption values, it is able to calculate the current economy rate. This is the distance the boat is travelling for every unit of fuel used. The economy rate figure, depending on which distance unit and fuel volume unit the Tracker500i is set to, will have units like miles per gallon or kilometres per litre. As the speed error cause by Selective Availability becomes significant at low boat speeds, the economy rate is not displayed for speeds of 5 knots or less. If the Tracker500i is receiving corrections from a differential receiver, the economy rate is displayed whenever the boat speed is above 1 knot.

Tracker500/500i User Manual

5

2.0 Overview

 

 

 

Boat Track

Display is backlit for

NAVMAN

Tracker500

 

Night Operation

 

 

Screen Cursor

 

 

 

Boat Symbol

 

 

Escape Key

 

 

 

 

 

 

‘Escape’ from screen or menu

Active Route

 

 

Also backlighting on/off

Power On/Off

 

 

Move screen cursor

and Marks

 

 

 

 

and select menu

 

mark

zoom-in zoom-out

 

MOB

ctr

items

 

 

 

 

on

 

 

Man Over Board

 

 

Increase Trackplot Scale

 

 

 

Reduce Trackplot Scale

Centre Boat on Trackplot Screen

Power On/Off and Mark Key

The power on/off key performs a number of functions. Firstly, to switch on the Tracker500/500i, momentarily press the Power on/off key. To switch off, press and hold the key until the display becomes blank.

The Power on/off key also functions as the mark key. The mark key provides a quick method of saving the current boat position. See section 12.0 Marks.

-MOB- Keys

Press the power on/off key and the zoom-in key together to activate the Man Over Board (MOB) function. See section 3.0 Man Over Board (MOB) Function for further details.

Escape Key

The key is used to back out of sub screens or sub menus. When stepping through Tracker500/500i screens you can press the key to return to the screen previous to the one currently displayed. Each time the key is pressed you will ‘step back’ one screen. The key is also used to control backlighting level. Press and hold the key to automatically step through five backlight levels. Release the key when the required backlight level is obtained.

Cursor Keys

The cursor keys control the movement of the screen cursor while in track plot mode. Movement in eight directions is possible. The cursor keys are also used to select and edit data such as setup information in the setup screens, waypoint data, and route configurations. See section 5.0 for further details. In simulation mode these keys control the simulated speed and heading.

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Tracker500/500i User Manual

zoom-in, zoom-out keys

The Zoom In and Zoom Out functions are only active while the Track Plot screen is displayed. The scale of the displayed track plot area can be instantly changed by pressing the zoom-in or zoom-out key. To see more detail press the zoom-in key. To see a larger area but less detail press the zoom-out key. When any list is displayed, such as waypoints or datums, the zoom-in key will step down through the list a screen at a time. The zoom-out key will step up through a list in the same manner.

-ctr- Keys

The centre function is also only active while the Track Plot screen is displayed. The centre function positions the boat in the centre of the Trackplot screen. Momentarily press the -ctr- keys to activate this function. This function is also an effective method of ‘finding’ the boat when initially not displayed on the screen.

3.0 Man Over Board (MOB) Function

The MOB function allows the boat position to immediately be saved as a waypoint named MOB, and to immediately start navigating to it. The MOB function can be activated from any screen.

The following sequence activates this function:

1. Momentarily press the keys labelled MOB (two left most keys). The current boat position is stored as a waypoint with the name MOB.

2. The Tracker500/500i beeps ten times to indicate that the MOB function has been initiated.

3. A user prompt will appear asking if you are ready to start navigating to the MOB location. This gives you the opportunity to disable the autopilot, if it is currently active. If the autopilot is not active, press the key to immediately start navigating to the MOB location.

4. The display mode is automatically changed to the Highway screen, with the Tracker500/500i navigating to the MOB waypoint.

Tracker500/500i User Manual

7

4.0 Start-up Sequence

Press the power key to switch power on.

To switch power off, press and hold the power key until the display goes blank.

Immediately after power-up the unit will display the software version number and a GPS navigation warning.

mark MOB zoom-in ctr zoom-out

on

Press any key to proceed and start normal Tracker500/500i operation. The satellite status screen will be displayed until the Tracker500/500i receives a valid position fix from the antenna or the key is pressed.

4.1 Satellite Status Screen

mark

zoom-in

zoom-out

MOB

 

ctr

on

During satellite acquisition the satellite status screen displays the following information.

The top left corner of the display indicates satellite acquisition status.

ACQ

Receiving satellite data and acquiring a position fix.

3D NAV Obtained a valid three dimensional position fix.

2D NAV Obtained a limited, two dimensional, position fix. The altitude is locked to the last known altitude. This situation arises if the GPS receiver does not have a clear view of the sky and is unable to track all available satellites.

8

Tracker500/500i User Manual

DIFF

Operating in differential GPS mode. Indicates that Tracker500/500i is

 

receiving valid RTCM 104 data and that lat/lon

values provided by the

 

Tracker500/500i have had differential corrections

applied.

Using differential GPS (DGPS) will improve receiver accuracy to 5-10 metres, regardless of errors induced by the USA Department of Defense Selective Availability program.

The top right corner indicates the geometric accuracy of the position fix. A low number indicates a more accurate position fix.

The central area of the display indicates the position of each satellite. The outer circle

represents the horizon (north = top centre), while the inner circle represents 45° above the horizon. The centre point is directly overhead. Satellites used in the current position calculation are shown highlighted (reverse text).

The lower part of the display is made up of a bar graph, indicating the signal strength of

each satellite. Each of the horizontal lines is spaced 5dBHz apart with the lowest line representing 25dBHz.

The above information will remain displayed for 5 seconds after a position fix has been obtained. The acquisition process is fully automatic and requires no user intervention

Following the above power-up sequence the Tracker500/500i will display the main selection screen. See section 5.0 for more details.

4.2 Acquisition Period

The time from initial power-up to the time the Tracker500/500i calculates the latitude and longitude of the current position is known as the Time To First Fix (TTFF). The TTFF varies in relation to a number of factors, but primarily varies due to the amount of time that has passed since the Tracker500/500i last obtained a fix. If the Tracker500/500i has a clear view of the sky it will typically acquire a position in 45 seconds. The TTFF may extend out to a few minutes if the Tracker500/500i has not been used for periods longer than a few months. If the Tracker500/500i has moved a significant distance, typically greater than 500 km, since the last time it was used, it will automatically go into a cold start mode and “search” the sky for satellites. This is fully automatic and requires no user intervention. In cold start mode the TTFF may extend out to 8 minutes in the worse case. The TTFF is also influenced by the current satellite geometry and position of the antenna. The antenna must have an unobstructed view of the sky.

The Tracker500/500i will always do a cold start the first time it obtained a fix, switch to the Trackplot screen and press the Trackplot screen boat and cursor positions.

is turned on. Once it has -ctr- keys to initialise the

Tracker500/500i User Manual

9

5.0 Moving Around the Screens

After the power-up sequence has completed, as described in the previous section, the Main Selection screen will be displayed, as shown below.

All Tracker500/500i screens are accessed from this screen. Graphical screens showing boat position and navigation data are available from this screen, along with waypoint and route management features and instrument setup screens. The Satellite Status screen, displayed at power-up, can also be viewed using this menu.

mark

zoom-in

zoom-out

MOB

 

ctr

on

5.1 Menus

The cursor keys are used to highlight menu items on screens such as the Main Selection screen, Setup, Waypoints and Routes screens. Press the or key to step up/down the menu items to highlight the item you wish to change or view. Press the key to select the highlighted item and move to the associated sub-screen. Press the key to return to the previous level.

The sub-screen selected may provide another list of related screens. The cursor keys can then be used to select a screen from the list, stepping down to the next level. This hierarchical approach of stepping through various levels of screens is used throughout the Tracker500/500i. It is important to note that you are able to step back to previous screens by pressing the key. Each time the key is pressed you will return to the previous screen displayed. Eventually, by repeatedly pressing the key, you will return to the Main Selection screen.

5.2 Changing Names or Numeric Values within data fields

The method described above also applies when a name or multi-digit number needs to be changed, for example waypoint names and waypoint lat/lon values. See section 11.0 Waypoints for a detailed explanation of waypoints. Once information for a particular waypoint is displayed the or keys can be pressed to highlight the name or data you wish to change (waypoint lat/lon, symbol, etc).

10

Tracker500/500i User Manual

After a value has been selected by pressing the key, the display will highlight the first character, indicating that you are able to change it. Press the or key to scroll through the letters of the alphabet and numbers 0-9. After you have reached the required letter or number press the key to move to the next character within the name or data. When you have completed all changes press the key to finish editing the value.

5.3 Screen Summary

Two graphical screens simplify navigation. The Trackplot Screen provides you with a graphical representation of your previous travel as well as your planned route. The Highway Screen provides graphical birds-eye-view roadway guidance to your destination

Trackplot Screen

Highway Screen

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Three data screens enable

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

easy access to essential

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

information such as

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

navigation data, satellite

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

status information, and fuel

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

consumption/economy/used

 

 

 

 

 

Navigation Data

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

information.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Satellite Status

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fuel Data

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Navigation functions, waypoint and route construction and general setup parameters are accessed from five main screens.

Tracker500/500i User Manual

11

6.0 Trackplot Screen

The Tracker500/500i features a Trackplot Screen that plots your current position and course. The current vessel speed and heading are also shown in the lower section of the screen. To display the Trackplot screen select the TRACK function from the Main Selection screen. Details of the Trackplot screen are shown below.

 

 

 

 

 

 

The Trackplot screen shows the track of

 

 

 

 

 

 

the boat as it moves. The boat position is

Destination Waypoint details

 

 

saved in memory at regular intervals.

 

 

These intervals can be time intervals or

such as distance to go, bearing

 

 

distance intervals.

 

to waypoint and time to go.

 

 

 

 

 

 

 

Waypoint symbol. Seven

 

 

 

 

 

 

 

 

 

The Trackplot cursor is

waypoint symbols are

 

 

 

 

 

 

 

 

 

used to identify objects

available for indicating

 

 

 

 

 

 

 

 

 

on the display and to

waypoints on the

 

 

 

 

 

 

 

 

 

move the viewable

Trackplot screen. They

 

 

 

 

 

 

 

 

 

trackplot area. Shift the

are described in section

 

 

 

 

 

 

 

 

 

cursor off the edge of

11.0 Waypoints. To

 

 

 

 

 

 

 

 

 

the screen to change

display a waypoint’s

 

 

 

 

 

 

 

 

 

the viewable area.

name, move the cursor

 

 

 

 

 

 

 

 

 

Holding the cursor keys

over the waypoint

 

 

 

 

 

 

 

 

 

down will activate rapid

symbol. The name will

 

 

 

 

 

 

 

 

 

movement.

appear in the upper

 

 

 

 

 

 

 

 

 

If the cursor is moved,

section of the display.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

the latitude and

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

longitude of the cursor

 

mark

 

zoom-in

 

 

zoom-out

position will be

 

 

 

ctr

displayed in the upper

 

 

 

MOB

 

 

 

 

 

section of the display

 

on

 

 

 

 

 

 

Current boat speed and heading

 

 

 

 

 

 

 

 

 

for 5 seconds.

 

 

 

 

 

 

 

 

 

 

The -ctr- keys centre the boat on the screen. Momentarily press both -ctr- keys to centre the boat. This method allows centring of the boat when initially not displayed on the screen.

The scale of the displayed track plot area can be instantly changed by pressing the zoom-in or zoom-out keys. To see more detail press the zoom-in key. To see a larger area but less detail press the zoom-out key.

Scale

The scale is momentarily displayed in the upper left corner of the Track Plot display whenever the cursor is moved or a zoom key is pressed. The scale can be adjusted from 0.1 to 500 miles/kilometres by pressing the zoom-in or zoom-out keys. The figure displayed is the vertical distance from the top to the bottom of the displayed area.

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Tracker500/500i User Manual

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