AV8OR User’s Guide
Aviation Mode Operation
Weather Function
Pub. No D200803000008 Page 3-115 Rev 3 Apr 2009
© Honeywell International Inc. Do not copy without express permission of
Honeywell.
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Area of coverage
•
Weather phenomenon details.
Text SIGMETs (USA only)
Tap on the
CHOOSE PRODUCT
soft key on the Weather Main page
and select Text SIGMETs from the SELECT WX PRODUCT box.
Figure 3-151: Text SIGMETs
A SIGMET) is an advisory of non-convective weather that is
potentially hazardous to all aircraft. SIGMETs address details
regarding severe icing not associated with thunderstorms, severe or
extreme turbulence not associated with thunderstorms, dust or sand
storms lowering visibility to less than 3 miles, volcanic ash. SIGMETs
are considered widespread because they must either be affecting or
forecast to affect an area at least 3,000 square miles. However,
during the forecast period, the actual affected area may be much
smaller. SIGMETs are issued as needed and the maximum forecast
period is 4 hours, except for 6 hours for conditions associated with
hurricanes.
A SIGMET contains elements in the following order:
•
Forecast Area
•
Report Type
•
Date and time issued
•
Report designation and reason for issuance
•
Validity period
•
Area of coverage
