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#1
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What is MVFR?
I am not a pilot and saw this chart for current flight
rules. What does MVFR stand for? Thanks. KM http://www.wunderground.com/US/Region/US/2xFlight.html |
#2
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) wrote:
I am not a pilot and saw this chart for current flight rules. What does MVFR stand for? Thanks. Marginal VFR. The yellow caution light between IFR and VFR. -- Peter |
#3
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"Peter R." wrote:
) wrote: I am not a pilot and saw this chart for current flight rules. What does MVFR stand for? Thanks. Marginal VFR. The yellow caution light between IFR and VFR. -- Peter Thanks! |
#4
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) wrote:
"Peter R." wrote: ) wrote: I am not a pilot and saw this chart for current flight rules. What does MVFR stand for? Thanks. Marginal VFR. The yellow caution light between IFR and VFR. -- Peter Thanks! You're welcome, but on a second reading of your post I see that I may have omitted a few points. IFR and VFR are the two sets of flight rules that define both a pilot's and air traffic controller's legal responsibilities in specific visibility and ceiling conditions for specific airspaces. However, the acronyms IFR, VFR, MVFR, and LIFR, also are used to categorize the visibility and ceiling conditions at weather reporting stations. In other words, these acronyms are a sort of shorthand to quickly describe weather conditions. MVFR conditions exist when visibility is three-to-five miles and/or the ceiling is between 1,000 to 3,000 feet AGL. Here is a good chart that breaks down these categories of weather conditions you are likely to see on an aviation weather chart: http://adds.aviationweather.noaa.gov...iption_ifr.php -- Peter |
#5
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Peter R. ) wrote:
IFR and VFR are the two sets of flight rules that define both a pilot's and air traffic controller's legal responsibilities in specific visibility and ceiling conditions for specific airspaces. Sheesh, I should have included the disclaimer that this only applies to the US. There might be other types of flight rules in other countries, of which I don't know. -- Peter |
#6
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Of course, as others here will probably mention, it is incorrect to add
adjectives and qualifications to the acronyms VFR and IFR. These, as Peter states, are two different sets of operating rules, and it must always be perfectly clear which one applies at any moment in flying. It's one or the other - no "marginal" "low" or anything else. The acronyms used to describe conditions (as opposed to flight rules) are VMC and IMC, visual or instrument Meteorological Conditions. The only exception is SVFR - for "Special" VFR, which is correct because it actualy refers to a specific set of operating rules for pilots and controlers. All of us probably confuse and abuse sometimes, and it's no crime to say conditions are VFR, IFR or marginal VFR - but in practice there is no room for ambiguity. We're expected to know the rules and adhere to them. G Faris |
#8
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I ~really~ need to learn to finish a thread before staggering in... =}
Bob ^,,^ Bob Harrington wrote: wrote: I am not a pilot and saw this chart for current flight rules. What does MVFR stand for? Thanks. KM http://www.wunderground.com/US/Region/US/2xFlight.html Marginal Visual Flight Rules - weather that is not bad enough to require pilots to use cockpit instruments, but worse than fair weather VFR conditions. Ferzample, a high cloud base with light rain or haze that limits visibilty to some extent, but not so much as to preclude a pilot finding his/her way by the ol' Mk.I eyeball. More at: http://adds.aviationweather.noaa.gov...iption_ifr.php http://www.srh.noaa.gov/elp/aviation/pilot.shtml Bob ^,,^ |
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