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Pilot's Handbook of Aeronautical Knowledge
Aviation Weather Services

Electronic Flight Displays (EFD)
Multi-Function Display (MFD) Weather

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Pilot's Handbook of Aeronautical Knowledge



Table of Contents

Chapter 1, Introduction To Flying
Chapter 2, Aircraft Structure
Chapter 3, Principles of Flight
Chapter 4, Aerodynamics of Flight
Chapter 5, Flight Controls
Chapter 6, Aircraft Systems
Chapter 7, Flight Instruments
Chapter 8, Flight Manuals and Other Documents
Chapter 9, Weight and Balance
Chapter 10, Aircraft Performance
Chapter 11, Weather Theory
Chapter 12, Aviation Weather Services
Chapter 13, Airport Operation
Chapter 14, Airspace
Chapter 15, Navigation
Chapter 16, Aeromedical Factors
Chapter 17, Aeronautical Decision Making




Resolution Display
The resolution of the displayed data will pose additional
concerns when the range is decreased. The minimum
resolution for NEXRAD returns is two kilometers. This means
that when the display range is zoomed in to approximately
ten miles, the individual square return boxes will be more
prevalent. Each square will indicate the strongest display
return within that two kilometer square area.

AIRMET/SIGMET information is available for the displayed
viewing range on the MFD. Some displays are capable of
displaying weather information for a 2,000 mile range.
AIRMETS/SIGMETS are displayed by dashed lines on the
map. [Figure 12-25]

The legend box denotes the various colors used to depict the
AIRMETs such as icing, turbulence, IFR weather, mountain
obscuration as well as surface winds. [Figure 12-26] The great
advantage of the graphically displayed AIRMET/SIGMET
boundary box is the pilot can see the extent of the area that
the report covers. The pilot does not need to manually plot the
points to determine the full extent of the coverage area.

Graphical METARs
METARs can be displayed on the multi-function display.
Each reporting station that has a METAR/TAF available
is depicted by a flag from the center of the airport symbol.
Each flag is color coded to depict the type of weather that
is currently reported at that station. A legend is available to
assist users in determining what each flag color represents.
[Figure 12-27]

The graphical METAR display shows all available reporting
stations within the set viewing range. By setting the range
knob up to a 2,000 mile range, pilots can pan around the
display map to check the current conditions of various
airports along the route of flight.

By understanding what each colored flag indicates, a pilot can
quickly determine where weather patterns display marginal
weather, IFR, or areas of VFR. These flags make it easy to
determine weather at a specific airport should the need arise
to divert from the intended airport of landing.

NEXRAD radar display (500 mile range).
Figure 12-24. NEXRAD radar display (500 mile range). The individual color gradients can be easily discerned and interpreted via the
legend in the upper right corner of the screen. Additional information can be gained by pressing the LEGEND soft key, which displays
the legend page.