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route any more, then recalculates the route based upon your new position and
heading.
Elevation: When the GPS receiver can see at least four GPS satellites, it can
determine its current position in three dimensions. In this case the elevation is
calculated together with the latitude/longitude position. Note that some older GPS
units may provide incorrect elevation data because they use a simple ellipsoidal
earth model rather than a database that contains local sea levels. You should also
be aware that the elevation value is generally less accurate (by at least a factor of 2)
than the horizontal position. See also 2D/3D GPS Reception.
ETA (Estimated Time of Arrival): A frequently used expression in navigation. It
represents the time when you will reach your destination based upon calculations
using the remaining part of the route and available information of the roads used.
This estimation can only be used as a general reference. It will not be able to take
into account your future speed or the traffic delays. In V7 Navigation this value is
shown as 'Estimated Arrival' on the Route Information screen (Page 34).
ETE (Estimated Time Enroute): Another frequently used expression in navigation.
It represents the time needed to reach your destination based upon calculations
using the remaining part of the route and available information of the roads used.
This estimation can be used only as a general reference. It will not be able to take
into account your future speed or the traffic delays. In V7 Navigation this value is
shown as 'Time left' on the Route Information screen (Page 34).
GPS: Abbreviation of Global Positioning System. This system is operated by the
DoD (the Department of Defense of the Unites States Government). It consists of 24
satellites orbiting Earth, and several ground stations to keep the satellites in sync. To
calculate your position, your GPS device uses the signals received from those GPS
satellites that are currently visible at your location. You can use this service free of
charge.
Lock-on-Road: This function of V7 Navigation will always keep the blue (yellow
when using night colors) arrow representing your actual position on the nearest road.
This automatic feature is necessary as the position given by the GPS receiver is not
perfectly accurate. Under normal circumstances Lock-on-Road will eliminate the
occasional position error. If the corridor of error is too large, your position may be
shown over a different street on the map. You can only avoid that by using good
quality GPS equipment positioned so that it has a direct view to as large a portion of
the sky as possible. Lock-on-Road is always active in V7 Navigation when GPS
position is available. See also in Page 18.
Lock-to-Position: When GPS position is available, V7 Navigation will automatically
keep moving the map to always have the blue (yellow when using night colors)
arrow, representing your actual position, on the screen. You can move the map to
lose this position. Then the View Hold button appears on the screen. Tapping it will
re-enable Lock-to-Position. See also Page 28.
Map Orientation: V7 Navigation is able to rotate the map for your convenience. If
you choose Track-up mode, the map will be rotated to look in the direction of your
heading. Selecting North-up, the map remains oriented to have North toward the top.
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