Garmin International Inc 01748 用户手册
Astro and DC 40 Owner’s Manual
Settings
Time Zone–selects your
time zone. Select Other to
enter a UTC (Universal Time
Coordinate) offset.
UTC Offset–specifies the offset
UTC Offset–specifies the offset
from UTC (when Time Zone
is Other).
Daylight Saving Time–selects
Daylight Saving Time–selects
Daylight Saving Time (Yes),
Standard Time (No) or
automatically change (Auto).
Units Setup
To open the Units Setup page:
Press MENU > MENU >
Advanced > Settings > Units.
Position Format–specifies the
coordinate system to use for
location readings.
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Map Datum–sets the
coordinate system in which a
given location reading appears.
Do not change the map datum
unless you are using a map or
chart that specifies a different
position format.
Distance/Speed–sets the unit of
Distance/Speed–sets the unit of
measure for distance and speed
readings.
Elevation (Vert. Speed)–sets
Elevation (Vert. Speed)–sets
the unit of measure for your
rate of ascent or descent.
Depth–sets the unit of measure
Depth–sets the unit of measure
for depth.
Pressure–sets the unit of
Pressure–sets the unit of
measure for gauge and
atmospheric pressure readings.
Heading Setup
The Heading Setup page specifies the
type of heading display and the type
of North reference used to calculate a
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