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Welcome to the Dauntless Aviation Glossary!
At Dauntless, our editorial staff maintains the web's largest unified glossary of aviation terms. This glossary is built from a combination of official, quasi-official,
and proprietary sources (including original material that we develop oursselves). Uniquely, we often provide multiple definitions of a given term so that you can find that which best applies
to you. In order to maximize your learning efficiency, this glossary (and similar ones for our international users) is incresingly fully integrated into our aviation learning apps, including
our FAA written test prep and FAA practical test prep software and apps. If you like this glossary,
you'll love them with their polished learning environments and world's best and clearest content (please do give them a try.).
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Thermal
Thermal | | A column of rising air associated with adjacent areas of differing temperature. Thermal activity caused by the sun’s heating usually starts 2 to 3 hours after sunrise. | source: FAA Balloon Flying Handbook (FAA-H-8083-11) |
| | A buoyant plume or bubble of rising air. | source: FAA Glider Flying Handbook (FAA-H-8083-13A) |
| | A buoyant plume or bubble of rising air. | source: FAA Weight Shift Control Handbook (FAA-H-8083-5) |
| | A relatively small-scale, rising air current produced when the Earth's surface is heated. Thermals are a common source of low level turbulence for aircraft. | source: NOAA National Weather Service Glossary |
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Disclaimer: While this glossary in most cases is likely to be highly accurate and useful, sometimes, for any number of editorial, transcription, technical, and other reasons, it might not be.
Additionally, as somtimes you may have found yourself brought to this page through an automated term matching system, you may find definitions here that do not match the cotext or application in which
you saw the original term. Please use your good judgement when using this resource.
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