For aviation purpose, a ceiling is the lowest layer of clouds reported as being broken (BKN) or overcast (OVC), or the vertical visibility into an obscuration like fog or haze. Clouds are reported as broken when five-eights to seven-eights of the sky is covered with clouds.
Ceiling - 14 CFR 1.1
Tags: 14 CFR 1.1, FAA, Regulatory
Ceiling means the height above the earth's surface of the lowest layer of clouds or obscuring phenomena that is reported as broken , overcast , or obscuration , and not classified as thin or partial .
ceiling and visibility
The ceiling is the height ascribed to the lowest layer of clouds or obscuring phenomena when it is reported as broken, overcast, or obscuration and not classified as "thin" or "partial." The ceiling is termed unlimited when these conditions are not satisfied.
At a certain altitude climb performance will reach 100 ft/min on the VSI, the aircraft is then said to have reached its service ceiling. Absolute ceiling will be reached when the RoC is 0 ft/min.
Maximum Rate of Climb, VY ...
The ceiling also refers to the height of the lowest cloud layer above the ground, below which Visual meteorological conditions exist, permitting flight by visual flight rules. For example, a layer of overcast or broken clouds having a base of 3,000 ft.
~: The height from the surface to the lowest layer of clouds that are reported as "broken", "overcast", or "obscuration", but not classified as "thin" or "partial".
Center: A common abbreviation for ARTCC.
Clearance: 1. Your IFR clearance for your intended route, or approach.
~ - (1) The heights above the earth's surface of the lowest layer of clouds or obscuring phenomena that is reported as "broken," "overcast," or "obscuration," and not classified as "thin" or "partial".
The altitude above sea level beyond which an airplane can no longer climb more than 30 m (100 ft) per minute.
service ceiling Usually height equivalent to air density at which maximum attainable rate of climb is 100 ft/min.
servo A device which acts as a relay, usually augmenting the pilot's efforts to move a control surface, or the like.
sfc Specific fuel consumption (which see).
~ - Height above the earth's surface of the lowest cloud layer
Controlled Airspace - Airspace within which ATC service is provided
Control Zone - Controlled airspace extending upwards from the surface to 3,000 feet above airport elevation ...
~s. The height above the ground of the base of the lowest layer of clouds when over half of the sky is obscured.
The lowest height at which a broken or overcast condition exists, or the vertical visibility when an obscured condition such as snow, smoke or fog exists, whichever is the lower.
~ and visibility unlimited, ideal flying weather
Common traffic advisory frequency ...
~ - Normal maximum operating altitude of an aircraft.
CENTER OF GRAVITY - (CQ), the point on an aircraft's structure where the total combined weight forces act.
~ and Visibility OK / Clouds and Visibility OK
~ and Visibility Unlimited ...
POINT CEILING: A limit on the amount of points that can be earned through a specific method, such as an affinity card or a special bonus offer.
Service Ceiling: Altitude at which cabin crews can serve drinks.
Spoilers: The Federal Aviation Administration.
Stall: Technique used to explain to the bank why your car payment is late.
~: Height above ground or water level of the base of the lowest layer of cloud, below 20,000 feet, covering more than half of the sky. Service ceiling also means an aircraft's density altitude at which its maximum rate of climb is lower or equal to 100 feet per minute.
~: Height above the earth's surface of the lowest layer of clouds.
~ Zero: Less than 50 feet from the ground to cloud base.
CG: Center of Gravity
CG: Commanding General
Chaff or Window: Metal foil strips dropped for aircraft to disrupt and confuse radar detection.
Instrument Meteorological Conditions (IMC) - Meteorological conditions expressed in terms of visibility, distance from clouds, and ceiling less than the minimums for visual meteorological conditions (VMC).
~: absolute, 7.5.3
~: absolute, 7.5.6, 13.7.1, 13.7.1, 17.2.5
center of area: definition, 6.1.3
center of lift, 17.1.9
center of lift: definition, 6.1.3
center of mass, 6.1, 17.1.9
center of mass , 6.1.1
center of mass, 6.1.3
centrifugal field, 18.6.2, 19.2 ...
At about 11 PM, I was cleared for takeoff under an overcast sky with the ceiling at 900 feet. At about 300 feet, I was instructed by the tower to contact the departure control. Shortly after I contacted the departure control, I engaged the autopilot.
First, much of the panic involved in screwing around under 500 foot ceilings has nothing to do with the weather, but has everything to do with not being able to see squat and not knowing exactly where you are. The good news is that GPS has solved much of that dilemma.
for a fuel stop in South Carolina"before continuing to Key West"there was a 400-foot ceiling with light rain. The surface temperature was above freezing, though, and as we broke out on top without any icing issues, I began to settle in for the four-hour flight.
In the following picture you can see that there are many skylights built into the ceiling of the building. This allows the workplace to be lit by natural light, saving electricity. It also gives the inside of the building a really bright clean feeling.
While flying at its service ceiling of 35,000 feet, the PiperJet is expected to achieve a max cruise speed of 360 knots, burn 77 gph and provide a range of 1,000 nm with NBAA 100 nm reserves.
The range of the aircraft was some 620 miles and had a service ceiling of 25,400 ft. Its maximum take-off weight was 41,529 lbs, with a wing span of 137 ft, 1 in, length of 82 ft 4 in and a wing area of 2,523 sq. ft. The TB-3's main armament, apart from its fighter "parasites" was two 7.
Now, check the weather: There should be little or no wind, good visibility (no haze) and at least a 3,000 foot ceiling. Avoid the time around sunset if your active runway is 22 to 33! And, have as few friends around as possible. (They have a tendency to make us show off; we can do that later.
VFR weather minimums for controlled airspace require at least a 1,000-foot ceiling and three miles visibility except for "Special VFR" clearances to operate "clear of clouds.
For example, when prevailing low ceilings are forecast or observed over a given area an IFR AIRMET is issued. Though AIRMETs are nominally for all aircraft, they are much more significant for small aircraft. A more severe aviation weather advisory is called a SIGMET.
As soon as we went 'clocks off' (ending the exercise) I pulled off my headset, sank back in my chair and laughed at the ceiling in horror at what'd just happened. "Jesus Christ..." My controlling had been flawless up to that point, only about two minutes from the end of the exercise.
VFR operations specify the amount of ~ and the visibility the pilot must have in order to operate according to these rules. When the weather conditions are such that the pilot can not operate according to VFR, he or she must use instrument flight rules (IFR).
With Cutlass prices already bumping the ~ of the budget-buy category, we're going to leave the more expensive 1996 and newer 172s for another day.
Visual Meteorological Conditions
The conditions of different meteorological conditions such as cloud coverings, ~s and other atmospheric states. The FAA has a list of what conditions are safe or not safe to fly in for various stages during a flight.
The overhead is precisely what you landlubbers would call a "~": "Easing out the champagne cork with his thumbs, Ensign Dumbo heard a loud crack as it impacted the overhead." Of course it works as an adjective, too: "Sufferin' catfish! if the overhead light ain't burned out again!" ...
Visual Meteorological Conditions (VMC) - Weather conditions expressed in terms of visibility, distance from cloud, and cloud ~ equal to or greater than those specified in Federal Aviation Regulations Part 91.155 for aircraft operations under Visual Flight Rules.
31 (g)(2)(i), indicates that high altitude flight physiology training be attended by a person acting as a pilot in command of a pressurized airplane that has a service ~ or maximum operating altitude, whichever is lower, above 25,000 feet MSL.
INSTRUMENT METEOROLOGICAL CONDITIONS (IMC). Weather worse than 1500 feet ~ or 3 NM visibility. IMC requires use of IFR.
VISUAL FLIGHT RULE (VFR) CONDITIONS - Meteorological conditions under which VFR flight is permitted. For VFR flight certain requirements for visibility, ~s (for takeoffs and landings), and cloud clearances must be met.
The aim of the climb performance experiment is to determine the maximum rates of climb, and the corresponding speeds at different altitudes, and to extrapolate the service and absolute ~s for airplane. Minimum time required for climb from h1 to h2 can also be evaluated.
Weather, measure ~ two thousand overcast, viibility three, haze, smoke, temperature seven one, dew point five seven, wind two five zero at five, altimeter two niner niner six. I-L-S Runway Two Eight Left approach in use, Runway Two Eight Right closed, advise you have alfa.
Visual Flight Rules (VFR): A series of rules which apply to aircraft operating by visual reference and “see-and-avoid' procedures. Visual Flight Rules govern flights operating in weather conditions with ~s of 1,000 feet Above Ground Level (AGL) and at least three miles visibility.
perhaps read before the fire reaches your shops ~ and have the correct extinguisher around medical first aid might be useful if your kid took a sniff from it or somebody stored the remaining MEK in a sprite can with no label ..., Hand - Eye and other body part protection ...and so on ...
pilots once every two years CAVU ~ and visibility unrestricted (clear or scattered, vis > 10 miles) DUATS Direct User Access Terminal System (on-line weather briefings) FAQ Frequently Asked Questions (this posting) FS Flight Simulator, ...
See also: What is the meaning of Flight, Aircraft, Pilot, Speed, Plane?