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shallow fog
- Definição1
- Fog in which the visibility at 6 feet above ground level is five-eighths of a mile or more.
- Fonte1
- SPELLMAN, Frank R. The Handbook of Meteorology. Lanham, Maryland: Scarecrow Press, Inc., 2013. 237 p. ISBN 978-0-8108-8613-1.
- Fonte2
- INTERNATIONAL CIVIL AVIATION ORGANIZATION. Aerodrome design manual: visual aids. Parte 4. 4.ed. Montreal, 2004 (Doc. 9157)
- Fonte3
- WORLD METEOROLOGICAL ORGANIZATION. Manual on codes: international codes: volume I.2: annex II to the WMO technical regulations: parte B: binary codes. parte C: common features to binary and alphanumeric codes. Geneva, 2015. (WMO, n.306).
- Nota adicional1
- Acronym in English: MIFG
- Contexto
- Operating into a shallow ground fog can be difficult because the approach and runway lighting patterns, which are visible through the fog as the approach descent is conducted, shorten rapidly or disappear entirely when the aircraft approaches and enters the top of the fog layer. In shallow fog, lighting cues are lost at low heights and pilots flying visually during the rapid transition from visual cues to loss of visual cues can receive a false impression of the aircraft climbing rather than descending. Reacting to the impression of aircraft climb, initiating an even steeper rate of descent from a low height without visual cues, or at best very limited visual cues, will cause the aircraft to impact terrain or the runway at a high rate of descent.
- The descriptors MI, BC and PR shall be used only in combination with the letter abbreviation FG, for example MIFG.
- Shallow fog and any fog in the vicinity of the aerodrome shall always be reported as MIFG and VCFG respectively, whether rime ice is deposited or not.
- Subárea1
- Meteorology
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