Encyclopedia

indefinite ceiling

Also found in: Acronyms.

indefinite ceiling

[in′def·ə·nət ′sēl·iŋ]
(meteorology)
After United States weather observing practice, the ceiling classification applied when the reported ceiling value represents the vertical visibility upward into surface-based, atmospheric phenomena (except precipitation), such as fog, blowing snow, and all of the lithometeors. Formerly known as ragged ceiling.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

indefinite ceiling

As it pertains to meteorology, the ceiling classification denoting a poorly defined boundary between clouds and clear air where vertical visibility into surface-based obscuration ends.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
Mentioned in
References in periodicals archive
[The pilot] declared an emergency and landed without incident." No one was hurt and aircraft damage was "minor." Winds were calm and visibility was 1/4 mile in fog with an indefinite ceiling.
The ultimate low IFR departure includes a zero-zero takeoff: essentially no horizontal visibility and an indefinite ceiling. To make it interesting, we'd also forego the possibility of climbing out to VFR on top.
On a mission: LIFR departures: according to top operators, safe, regular departures in low IFR require devising a system to double-check everything and sticking to it
Copyright © 2003-2025 Farlex, Inc Disclaimer
All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.