Venturer HPS9308 - Manual (Page 93)

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Glossary 10
The manual may contain many technical terms. Please look below for an
explanation if you are unfamiliar with some of them.
2D/3D GPS Reception:
The GPS receiver uses satellite signals to calculate its (your) position.
Depending on the current positions of the ever moving satellites in the sky,
and the objects in your environment, the signal that your GPS device receives
may be weaker or stronger. Your GPS needs strong signals from at least four
satellites to give a three dimensional position including elevation. If fewer
satellites are available, it may still be possible to calculate the position but the
accuracy will be lower and the GPS device will not calculate elevation. This is
called 2D reception. Venturer GPS Navigation shows the quality of reception
on the Main menu, the GPS Data screen and both map screens. Note that 2D
and 3D GPS receptions have nothing to do with the 2D and 3D display modes
of the map. That is a way of representing the map on the screen independently
from the GPS reception.
Accuracy:
The difference between your real position and the one given by the GPS device
is affected by several different factors. The GPS is capable of providing a guess
of its current error based on the number of satellites it can receive a signal
from, and their position in the sky. This information is shown in Venturer GPS
Navigation on the GPS Data screen. Use it as a general reference only. Note
that several other factors affect the real accuracy, some of which the GPS is
incapable of estimating (e.g. signal delay in the ionosphere, reflecting objects
near the GPS device, etc.).
Active Route:
A route is an itinerary planned to reach your chosen destinations. A route
is active when it is used for navigation. Venturer GPS Navigation has only
one route at a time, and it is always active until you delete it, reach the final
destination or exit Venturer GPS Navigation. When there is more than one
destination to reach, the route is cut into different legs (from one via point to
another). Only one of these legs can be active at one particular time. The rest
of them are unused and shown in a different color on the map.
Automatic Route Planning (Autorouting):
You only need to set up your destination, and based on its map, the software
will automatically figure out which roads you need to take, and the turns you
need to make to get there. Venturer GPS Navigation will let you select multiple
destinations, and customize some important routing parameters.
Automatic Route Recalculation:
If this function is enabled, Venturer GPS Navigation recalculates your route if