Most recent edit on 2007-11-26 19:42:44 by MikeBevington
Deletions:
relelou
Edited on 2007-11-15 12:53:03 by RicpaScnab
Additions:
relelou
Edited on 2007-02-04 16:10:54 by RolandCollins
Additions:
Visibility: For visual flight below 10,000ft AMSL, visibility must be at least 3sm (5km). When visibility is less than the required minimum, aircraft may not take off under visual flight rules (VFR). The pilot must either take off under IFR, delay until the required visibility exists, or not take off at all.
Once airborne, a VFR aircraft must change altitude, divert or land if visibility falls below the specified minimum. A VFR aircraft may not land visually at an airport where visibility is less than 3sm (5km) unless in emergency or due stress of weather.
Although 3sm (5km) seems like plenty of visibility, it isn?t much for an aircraft flying at 150+ knots or approaching an airport at 100+ knots. There just isn?t enough time for pilot and their aircraft to react to objects that suddenly appear through precipitation or fog.
For visual flight at or above 10,000ft AMSL, visibility must be at least 5sm (8km). The greater visibility requirement is because higher altitudes are associated with aircraft that have higher speeds.
Distance from Clouds: Clouds restrict visibility quite severely therefore visual flights not are allowed inside cloud.
Because clouds continually change shape and size, visual flights are not allowed near clouds. Aircraft flying visually must stay out of clouds and at least 500ft below, 1,000ft above, and 2,000ft aside of clouds.
It?s important to recognize that not even the world?s most experienced and adept pilots know for certain when their aircraft is within these minima. No human being can judge 2,000ft, 1,000ft, or 500ft above, below, or near anything with any accuracy. Therefore, these minima are safety guidelines that should be honored to the pilot?s best judgment and ability. A pilot interested in safe flight will apply a safety margin in excess of the minimum stated in the rules. Stay away from and out of clouds or bad weather whenever flying visually.
Deletions:
Visibility: For visual flight below 10,000 FT AMSL, visibility must be at least 3 SM (5 KM). When visibility is less than the required minimum, aircraft may not take off under visual flight rules (VFR). The pilot must either take off under IFR, delay until the required visibility exists, or not take off at all.
Once airborne, a VFR aircraft must change altitude, divert or land if visibility falls below the specified minimum. A VFR aircraft may not land visually at an airport where visibility is less than 3 SM (5 KM) unless in emergency or due stress of weather.
Although 3 SM (5 KM) seems like plenty of visibility, it isn?t much for an aircraft flying at 150+ knots or approaching an airport at 100+ knots. There just isn?t enough time for pilot and their aircraft to react to objects that suddenly appear through precipitation or fog.
For visual flight at or above 10,000 FT AMSL, visibility must be at least 5 SM (8 KM). The greater visibility requirement is because higher altitudes are associated with aircraft that have higher speeds.
Distance from Clouds: Clouds restrict visibility quite severely, therefore visual flights not are allowed inside cloud.
Because clouds continually change shape and size, visual flights are not allowed near clouds. Aircraft flying visually must stay out of clouds and at least 500 FT below, 1,000 FT above, and 2,000 FT aside of clouds.
It?s important to recognize that not even the world?s most experienced and adept pilots know for certain when their aircraft are within these minima. There is no human being anywhere who can judge 2,000 FT, 1,000 FT, or 500 FT above, below, or near anything with any accuracy. Therefore, these minima are safety guidelines that should be honored to the pilot?s best judgment and ability. A pilot interested in safe flight will apply a safety margin in excess of the minimum stated in the rules. Stay away from and out of clouds whenever flying visually.
Edited on 2007-02-04 09:59:55 by MikeBevington
Additions:
Deletions:
Edited on 2007-02-04 06:30:51 by RolandCollins
Additions:
AGL = Above Ground Level
ft = feet
km = kilometres
m = meters
sm = statute miles
VMC = Visual Meteorological Conditions
The following table shows typical VMC Minima.
Deletions:
FT = Feet
KM = Kilometers
SM = Statute Miles
The following table shows Visual Weather Minimums.
Edited on 2007-02-03 03:30:12 by RolandCollins
Additions:
At the end of this lesson the student will generally understand how to include weather conditions in flight planning, how in-flight weather changes can affect a flight, and what to do when weather changes force the termination of a flight.
Visual weather minimums are the lowest conditions under which visual flight is allowed by aviation regulations. These conditions are called ?visual meteorological conditions? (VMC) and are officially defined as: ?Meteorological conditions expressed in terms of visibility, distance from clouds, and ceilings equal to or better than specified minima?. Aircraft may fly visually when conditions are at or better than these minimums and must fly on instruments or not at all when conditions are worse than these minimums.
Terms
AMSL = Above Mean Sea Level
FT = Feet
IFR = Instrument Flight Rules
KM = Kilometers
SM = Statute Miles
VFR = Visual Flight Rules
Airspaces: Visual weather minimums apply in airspace classes B, C, D, E, and G. They do not apply in Class A airspace because VFR flights are not allowed. All flights in Class A airspace are conducted under instrument flight rules (IFR) per aviation regulations.
Types of Flight: Visual weather minimums apply to flights conducted under VFR. They do not apply to flights conducted under IFR. Most general-aviation flights are VFR whereas all commercial flights are IFR, per regulations.
Visibility: For visual flight below 10,000 FT AMSL, visibility must be at least 3 SM (5 KM). When visibility is less than the required minimum, aircraft may not take off under visual flight rules (VFR). The pilot must either take off under IFR, delay until the required visibility exists, or not take off at all.
Once airborne, a VFR aircraft must change altitude, divert or land if visibility falls below the specified minimum. A VFR aircraft may not land visually at an airport where visibility is less than 3 SM (5 KM) unless in emergency or due stress of weather.
Although 3 SM (5 KM) seems like plenty of visibility, it isn?t much for an aircraft flying at 150+ knots or approaching an airport at 100+ knots. There just isn?t enough time for pilot and their aircraft to react to objects that suddenly appear through precipitation or fog.
For visual flight at or above 10,000 FT AMSL, visibility must be at least 5 SM (8 KM). The greater visibility requirement is because higher altitudes are associated with aircraft that have higher speeds.
Distance from Clouds: Clouds restrict visibility quite severely, therefore visual flights not are allowed inside cloud.
Because clouds continually change shape and size, visual flights are not allowed near clouds. Aircraft flying visually must stay out of clouds and at least 500 FT below, 1,000 FT above, and 2,000 FT aside of clouds.
It?s important to recognize that not even the world?s most experienced and adept pilots know for certain when their aircraft are within these minima. There is no human being anywhere who can judge 2,000 FT, 1,000 FT, or 500 FT above, below, or near anything with any accuracy. Therefore, these minima are safety guidelines that should be honored to the pilot?s best judgment and ability. A pilot interested in safe flight will apply a safety margin in excess of the minimum stated in the rules. Stay away from and out of clouds whenever flying visually.
The following table shows Visual Weather Minimums.
Deletions:
At the end of this lesson the student will generally understand how to include weather conditions in flight planning and what to do when weather changes force changes in flight plans and activities.
Visual weather minimums are the lowest conditions under which visual flight is allowed by aviation regulations. These conditions are called ?visual meteorological conditions? (VMC) and are officially defined as: ?Meteorological conditions expressed in terms of visibility, distance from clouds, and ceilings equal to or better than specified minima.? ? AIM/FAR 2007. Aircraft may fly visually when conditions are at or better than these minimums and must fly on instruments or not at all when these conditions are worse than these minimums.
Airspaces: Visual weather minimums apply in airspaces classes B, C, D, E, and G. They do not apply in Class A airspace because all flights in Class A airspace are instrument flight rules (IFR) per aviation regulations.
Types of Flight: Visual weather minimums apply to all general-aviation flights. They do not apply to commercial flights because all commercial flights are IFR per regulations.
Visibility: For visual flight below 10,000 feet above mean sea level (MSL), visibility must be at least three statute miles. When visibility is less than three statute miles, aircraft may not take off under visual flight rules (VFR). The pilot either must take off under IFR or may not take off at all. For visual flight above 10,000 feet MSL, visibility must be at least five statute miles. Aloft aircraft must change altitude or land if visibility falls below the minimum for the altitude. Aircraft may not land visually at airports where visibility is less than three statute miles unless there is no other airport to choose from.
Although three miles seems like plenty of visibility, it isn?t enough for aircraft flying at 150+ knots or approaching an airport at 100+ knots. There just isn?t enough time for pilots and their aircraft to react to objects that appear from the rain or haze.
Altitudes: At altitudes below 10,000 feet MSL, visibility must be at least three statute miles for visual flights. Above this altitude, visibility must be at least five statute miles. All aircraft flying visually must stay clear of clouds.
Clouds: Because clouds restrict visibility so severely, no visual flights are allowed inside.
Because clouds continually change shape and size, no visual flights are allowed near clouds. Aircraft flying visually must stay out of clouds and at least 500 feet below, 1,000 feet above, and 2,000 feet aside of clouds.
It?s important to recognize that not even the world?s most experienced and adept pilots know for certain when their aircraft are within these minima. There is no human being anywhere who can judge 2,000 feet, 1,000 feet, or 500 feet above, below, or near anything with any accuracy. Moreover, no pilot will be cited for violating these distances because authorities have no defensible ways of proving such violations. Therefore, these minima are safety guidelines that should be honored to the pilot?s best judgment and ability. Stay away from and out of clouds whenever flying visually.
The following table delineates Visual Weather Minimums.
Edited on 2007-01-27 23:27:52 by MikeBevington
Additions:
Explain what VFR weather limitations are and how they affect flight decisions.
At the end of this lesson the student will generally understand how to include weather conditions in flight planning and what to do when weather changes force changes in flight plans and activities.
WeatherMinimums
Visual weather minimums are the lowest conditions under which visual flight is allowed by aviation regulations. These conditions are called ?visual meteorological conditions? (VMC) and are officially defined as: ?Meteorological conditions expressed in terms of visibility, distance from clouds, and ceilings equal to or better than specified minima.? ? AIM/FAR 2007. Aircraft may fly visually when conditions are at or better than these minimums and must fly on instruments or not at all when these conditions are worse than these minimums.
Airspaces: Visual weather minimums apply in airspaces classes B, C, D, E, and G. They do not apply in Class A airspace because all flights in Class A airspace are instrument flight rules (IFR) per aviation regulations.
Types of Flight: Visual weather minimums apply to all general-aviation flights. They do not apply to commercial flights because all commercial flights are IFR per regulations.
Visibility: For visual flight below 10,000 feet above mean sea level (MSL), visibility must be at least three statute miles. When visibility is less than three statute miles, aircraft may not take off under visual flight rules (VFR). The pilot either must take off under IFR or may not take off at all. For visual flight above 10,000 feet MSL, visibility must be at least five statute miles. Aloft aircraft must change altitude or land if visibility falls below the minimum for the altitude. Aircraft may not land visually at airports where visibility is less than three statute miles unless there is no other airport to choose from.
Although three miles seems like plenty of visibility, it isn?t enough for aircraft flying at 150+ knots or approaching an airport at 100+ knots. There just isn?t enough time for pilots and their aircraft to react to objects that appear from the rain or haze.
Altitudes: At altitudes below 10,000 feet MSL, visibility must be at least three statute miles for visual flights. Above this altitude, visibility must be at least five statute miles. All aircraft flying visually must stay clear of clouds.
Clouds: Because clouds restrict visibility so severely, no visual flights are allowed inside.
Because clouds continually change shape and size, no visual flights are allowed near clouds. Aircraft flying visually must stay out of clouds and at least 500 feet below, 1,000 feet above, and 2,000 feet aside of clouds.
It?s important to recognize that not even the world?s most experienced and adept pilots know for certain when their aircraft are within these minima. There is no human being anywhere who can judge 2,000 feet, 1,000 feet, or 500 feet above, below, or near anything with any accuracy. Moreover, no pilot will be cited for violating these distances because authorities have no defensible ways of proving such violations. Therefore, these minima are safety guidelines that should be honored to the pilot?s best judgment and ability. Stay away from and out of clouds whenever flying visually.
The following table delineates Visual Weather Minimums.
Disclaimer
As an overview of weather effects on flight simulations, these articles are written in generalized terms, refer to other sources, and are therefore not intended to be complete or comprehensive explanations of the subject. They are for flight simulation only and are not intended for use in real-world aviation.
The Author
Bill Stack is an avid flight simmer, author of several books and magazine articles about flight simming, and president of TopSkills∞.
http://www.topskills.com/flitsim.htm∞
Deletions:
Ensure pilots understand xxxxxxxxxxx
At the end of this lesson the student will understand
WeatherMinimums
Content goes here
Assessment
http://www.topskills.com/∞
Edited on 2007-01-03 17:26:05 by MikeBevington
Additions:
http://www.topskills.com/∞
Deletions:
links go here
Edited on 2007-01-03 17:20:27 by MikeBevington
Additions:
WeatherMinimums
IFRLimitationsInWeather
Deletions:
None
Oldest known version of this page was edited on 2007-01-03 17:15:18 by MikeBevington []
Page view:
VFR Limitations in Weather
by BillStack
Purpose
Ensure pilots understand xxxxxxxxxxx
Objective
At the end of this lesson the student will understand
Prerequisites
None
Discussion
Content goes here
Assessment
Extensions
References
links go here
Categories
CategoryLessons
