Garmin GPSMAP 3210 Owner's Manual - Page 70

Position Format, Depth, Map Datum, WGS 84, Temperature, Distance, Speed, and Elevation, Pressure

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Main Menu Main Menu > System Tab The following settings are available: • Position Format-used to change the coordinate system in which a given location reading appears. Only change the position format if you are using a map or chart that specifies a different position format or you want to use a format you are familiar with. The default format is latitude and longitude in degrees, minutes, and thousandths of a minute (hddd°mm.mmm'). • Depth-select the units of measure for depth in feet (ft), fathoms (fa), or meters (m). You must be receiving NMEA Sonar depth data or using a GSD 20, GSD 21, or GSD 22 for the depth to appear. 62 • Map Datum-manually select the datum reference used to determine a given location. The default setting is WGS 84. The unit automatically selects the best datum depending on your chosen position format. Datums are used to describe geographic locations for surveying, mapping, and navigation and are not actual maps built in the unit. Although more than 100 datums are available, you should change the datum only if you are using a map or chart that specifies a different datum. WARNING: Selecting the wrong map datum can result in substantial position errors. When in doubt, use the default WGS 84 datum for best overall performance. • Temperature-set the units of measure for temperature in Fahrenheit (°F) or Celsius (°C). You must be receiving NMEA Sonar temperature data or using a Garmin Sonar Module for the Temperature to appear. • Distance, Speed, and Elevation-set the units of measure for distance, speed and elevation readouts in nautical (nm, kt, ft), nautical (nm, kt, m), statute (mi, mh, ft), or metric (km, kh, m) terms. • Pressure-sets the units of measure you want to use for weather readouts in inches mercury (in), millibars (mb), or hectopascals (hPa). You must be using a GDL 30/30A for this data to appear. • Heading-sets the reference used in calculating heading information. You can select from Auto Mag Var, True, Grid, and User Mag Var. Auto Mag Var provides magnetic north heading references that are automatically determined from your present location. True provides headings based on a true north reference. Grid provides headings based on a grid north reference. User Mag Var allows you to specify the magnetic variation at your present location and provides magnetic north heading references based on the variation you enter. • GPSMAP 3206/3210 Owner's Manual

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62
GPSMAP 3206/3210 Owner’s Manual
M
AIN
M
ENU
>
S
YSTEM
T
AB
M
AIN
M
ENU
The following settings are available:
Position Format
—used to change the coordinate system in which a given
location reading appears. Only change the position format if you are using
a map or chart that specifies a different position format or you want to use a
format you are familiar with. The default format is latitude and longitude in
degrees, minutes, and thousandths of a minute (hddd°mm.mmm’).
Depth
—select the units of measure for depth in feet (ft), fathoms (fa), or
meters (m). You must be receiving NMEA Sonar depth data or using a
GSD 20, GSD 21, or GSD 22 for the depth to appear.
•
•
Map Datum
—manually select the datum reference used to determine
a given location. The default setting is
WGS 84
. The unit automatically
selects the best datum depending on your chosen position format. Datums
are used to describe geographic locations for surveying, mapping, and
navigation and are not actual maps built in the unit. Although more than
100 datums are available, you should change the datum only if you are
using a map or chart that specifies a different datum.
WARNING:
Selecting the wrong map datum can result in substantial
position errors. When in doubt, use the default WGS 84 datum for best overall
performance.
Temperature
—set the units of measure for temperature in Fahrenheit (°F)
or Celsius (°C). You must be receiving NMEA Sonar temperature data or
using a Garmin Sonar Module for the Temperature to appear.
Distance, Speed, and Elevation
—set the units of measure for distance,
speed and elevation readouts in nautical (nm, kt, ft), nautical (nm, kt, m),
statute (mi, mh, ft), or metric (km, kh, m) terms.
Pressure
—sets the units of measure you want to use for weather readouts
in inches mercury (in), millibars (mb), or hectopascals (hPa). You must be
using a GDL 30/30A for this data to appear.
Heading
—sets the reference used in calculating heading information. You
can select from
Auto Mag Var
,
True
,
Grid
, and
User Mag Var
. Auto
Mag Var provides magnetic north heading references that are automatically
determined from your present location. True provides headings based
on a true north reference. Grid provides headings based on a grid north
reference. User Mag Var allows you to specify the magnetic variation at
your present location and provides magnetic north heading references
based on the variation you enter.
•
•
•
•
•
•