Frequently Asked Questions - Magellan iCGRS User Manual

Frequently Asked Questions

General
What is the difference between degrees/minutes/seconds (DEG/MIN/SEC) and degrees/
minutes/minutes (DEG/MIN/MMM or DEG/MIN/MM)?
There are different ways in expressing the coordinates computed using Lat/Lon
coordinate system. With DEG/MIN/SEC the final set of numbers (SEC) is
expressed as 0-59 while DEG/MIN/MM expresses the same value as 0-99 and
DEG/MIN/MMM is from 0-999. It would be the same as if you had one
clock that expressed time as hour/minutes/seconds and another clock that
expressed the same time as hours/minutes/decimals. The accuracy for any of
the three is the same. Which you choose is dependent upon your preference
or any chart you are using at the same time. (You should always make sure
that your SporTrak is setup to be the same as any map or chart you may be
using.)
What is 2D vs. 3D?
The difference is primarily how many satellites are used to compute the
position fix and how elevation is computed. In 2D (two-dimensional) only
three satellites are needed for a position fix and elevation is not computed.
Any elevation displayed by the SporTrak during 2D operation is the elevation
you entered. In 3D (three-dimensional), a minimum of four satellites are
needed to compute the position and at the same time, elevation is computed
by the SporTrak.
When the time changes for daylight savings time will the time, in the SporTrak change
automatically?
Yes. It is automatically selected when the receiver is used for the first time or
all of the memory has been cleared. If you need to change the settings for
daylight savings, you can use the Setup menu item and access "Daylight
savings". There you can select United States, European Union or you can use
the customize option to set the rules for daylight savings in your area.
How long can I expect my SporTrak to run on a fresh set of batteries?
Under normal operating conditions you should get up to 14 hours of use while
the display backlight is turned off. This duration will drop significantly if you
use the display backlight.
SporTrak Color GPS Mapping Receiver 61