Magellan GPS Tracker - Manual (Page 65)

Magellan GPS Tracker 55
You would generally want the receiver to use position coordinates in
the same map datum that is used by your maps. For example, the
Irish Grid uses the Irish datum, Finnish Grid uses KKJ datum,
Swedish Grid uses the RT 90 datum and Swiss Grid uses the Swiss
datum.
The default primary coordinate system will be Lat/Lon in Degrees/
Minutes and the default secondary coordinate system will be UTM.
Selecting Map Datum
You can change the datum the receiver uses to compute position coordinates.
You will want your receiver’s datum to match the datum on the map or chart
you are using. Use the map “legend” to determine the datum required for
the map or chart. If you are not using a map or chart or are unsure which
datum to use, select WGS84.
Press MENU, from any screen, highlight
SETUP and press ENTER. Highlight MAP
DATUM and press ENTER. A pop-up menu
will be displayed, highlight PRIMARY or
SECONDARY and press ENTER.
A pop-up menu will appear. Highlight your choice and press ENTER.
Default setting is WGS84.
Selecting Elevation Mode
You have the option of changing your elevation mode to 2D (2-Dimen-
sional) or 3D (3-Dimensional). You may find 2D useful if you know the
elevation of your position and the elevation will not change. For example, if
you are at sea level, you could use 2D because you know that your elevation
is zero.
WPT NAMES
OFF
ON
WPT NAMES
OFF
ON
WPT NAMES
OFF
ON
MAP DATUM
PRIMARY
SECONDARY