Garmin GPSMAP 295, Руководство и справочник пилота

Страница: 87 / 116

77
MENU
The ‘UNITS’ file tab provides the following settings:
• DISTANCE, SPEED— selects units of measure for distance and speed readouts; available units are
Nautical (nautical mile/knots), Statute (statute mile/mph) and Metric (kilometer/kph)
• VERTICAL SPEED— selects vertical speed readings in Feet/Minute or Meters/Minute.
• ALTITUDE— selects altitude display in Feet or Meters.
• TEMPERATURE— selects temperature display in degrees Fahrenheit or Celsius.
• PRESSURE— selects display of barometric pressure (altimeter setting) in Inches (Hg) or Millibars.
• HEADING— displays heading information based upon True north reference, Auto Mag (automati-
cally determined magnetic north reference), User Mag (user defined magnetic north) or Grid.
• POSITION FORMAT— selects position readouts in latitude/longitude (degrees, degrees/minutes
or degrees/minutes/seconds); British Grid; German Grid; Irish Grid; Maidenhead; MGRS; Swedish
Grid; Swiss Grid; Taiwan Grid or UTM/UPS.
• MAP DATUM— selects from a list of 107 built-in map datums. A map datum is a mathematical
model which defines where a given position is placed upon a map. The default setting is ‘WGS 84’
and should only be changed if you are using a map or chart which specifies a different datum.
To change units of measure, heading reference, position format or map datum:
1. Press MENU twice to display the Main Menu, then use the ROCKER KEYPAD to select ‘UNITS’.
2. Use the ROCKER KEYPAD to select the desired field and press ENTER . A pop-up window will
show the available settings for the selected field.
3. Use the ROCKER KEYPAD to select the desired setting and press ENTER .
4. If ‘User Mag’ is selected for Heading, use the ROCKER KEYPAD to highlight the magnetic variation
field and press ENTER . Use the ROCKER KEYPAD to enter local magnetic variation and press ENTER .
5. If ‘User’ is selected for Map Datum, a pop-up window will appear to enter the differences, from the
WGS 84 norm, for each datum parameter. Use ENTER and the ROCKER KEYPAD to enter the data.
Main Menu: Units
The MAP DATUM should only be changed if your chart
specifies a different datum. Selecting the wrong map datum
can result in substantial errors. When in doubt, use the
default WGS84 datum or select each datum applicable to
your region until you find the best positioning at a known
point.
The ‘UNITS’ tab allows you to change units of measure for
distance, speed, vertical speed, etc. This screen also allows
you to change position format (e.g. latitude and longitude in
degrees/minutes vs. degrees/minutes/seconds, etc.).