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Home » SHV Home » Aviation
» Flying Categories
Ceiling and Visibility
Categories
| Category |
Ceiling (feet) |
Visibility (miles) |
| LIFR |
less than 500 |
less than 1 |
| IFR |
500 to 999 |
1 to less than 3 |
|
MVFR |
1000 to 3000 |
3 to 5 |
| VFR |
greater than 3000 |
greater than 5 |
COMMON ABBREVIATIONS
WITH AVIATION:
AGL
- Above Ground Level
ASOS - Automated Surface Observing System
AWOS - Automated Weather Observing System
FAA - Federal Aviation Administration
IFR - Instrument Flight Rules
LIFR - Low IFR Weather Conditions
MSL - Mean Sea Level
MVFR - Marginal VFR Weather Conditions
NOAA - National Oceanic and Atmospheric Administration
NOTAM - Notice to Airmen
NWS - National Weather Service
PATWAS - Pilot's Automatic Telephone Weather Answering Service
TAF - Terminal Aerodrome Forecast
TWEB - Transcribed Weather Enroute Broadcast
VFR - Visual Flight Rules
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