Magellan Trailblazer, Справочное руководство

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2. Press the UP/DOWN ARROW to toggle between Lat/Lon and
UTM. (Default is Lat/Lon displayed as degrees/minutes.) Press
ENTER.
3. If Lat/Lon was selected, the receiver shows the two available
display options. Press the UP/DOWN ARROW to select de-
grees/minutes or degrees/minutes/seconds.
4. Press ENTER to return to the SETUP menu.
North Reference.
This is often referred to as magnetic variation. The
receiver should be set to use the same reference as your other navigation
aids.
1. From the SETUP menu, highlight "NORTH REF." and press
ENTER.
2. Press the UP/DOWN ARROW to toggle between true and
magnetic. (Default is magnetic.) Select magnetic if you are
using a compass. Select true if you are using a map or chart
without any other navigational aids.
3. Press ENTER to return to the SETUP menu.
Time Display.
The receiver stores time as UT, but can also display time in the
local clock by computing and storing an offset that is applied to UT before
display. If you select a local clock display, you may choose AM/PM or 24-hour.
1. From the SETUP menu, highlight "TIME DISPLAY" and press
ENTER.
2. Press the UP/DOWN ARROW to toggle between local (24
hour), local (AM/PM), and UT. (Default is UT.)
3. Press ENTER. lt you selected local time, key in the current time.
If AM/PM was selected, use the UP/DOWN ARROW to select
AM or PM. Press ENTER again.
Map Datum.
A map datum is a set of mathematical assumptions on which
measurements and positions on the surface of the earth are based. There are
a number of datums in common use, each based on a different set of values
and measurements.
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