Remote Pilot – Small Unmanned Aircraft Systems › III. Weather › Task B. Effects of Weather on Performance

UA.III.B.K1j

Knowledge

Weather factors and their effects on performance.

Ceiling and visibility

Study note

Get a short, cited explanation of this element written from the FAA handbooks: the core idea, the numbers that matter, common test traps, and a quick self-check.

From the FAA library

Aeronautical Information Manual p. 7-1-22
Chapter 7. Safety of Flight › Section 1. Meteorology › 7-1-7. Categorical Ceiling and Visibility Conditions
than 5 miles; includes sky clear. b. The cause of LIFR, IFR, or MVFR is indicated by either ceiling or visibility restrictions or both. The contraction “CIG” and/or weather and obstruction to vision symbols are used. If winds or gusts ... visibility restricted by fog. 3. MVFR CIG HZ FU-marginal VFR due to both ceiling and visibility restricted by haze and smoke. 4. IFR CIG RA WIND-IFR due to both low ceiling and visibility restricted by rain; wind expected…
Aeronautical Information Manual p. 7-1-6
Chapter 7. Safety of Flight › Section 1. Meteorology › 7-1-4. Graphical Forecasts for Aviation (GFA)
horizontal visibility. The following are examples of aviation forecasts depicted on the GFA: (a) Terminal Aerodrome Forecast (TAF) (b) Ceiling & Visibility (CIG/VIS) (c) Clouds (d) Precipitation / Weather (PCPN/WX) (e) Thunderstorm (TS) (f) Winds (g) Turbulence (h) Ice 2. Observations & Warnings ... hour. Provided below are the Obs/Warn product tabs available on the GFA website: (a) METAR (b) Precipitation/Weather (PCPN/WX) (c) Ceiling & Visibility (CIG/VIS) (d) Pilot Weather Report (PIREP) (e) Radar & Satellite (RAD/SAT) 3. The GFA will be continuously updated and available…
Aeronautical Information Manual p. 4-1-11
Chapter 4. Air Traffic Control › Section 1. Services Available to Pilots › 4-1-14. Automatic Flight Information Service (AFIS) - Alaska FSSs Only
omit those items contained in the broadcast if they are current. When rapidly changing conditions exist, the latest ceiling, visibility, altimeter, wind or other conditions may be omitted from the AFIS and will be issued by the FSS specialist ... service. Advise on initial contact you have ALPHA.” NOTE-The absence of a sky condition or ceiling and/or visibility on Alaska FSS AFIS indicates a sky condition or ceiling of 5,000 feet or above and visibility of 5 miles…
Aeronautical Information Manual p. 7-1-22
Chapter 7. Safety of Flight › Section 1. Meteorology › 7-1-6. Inflight Aviation Weather Advisories
VALID UNTIL 032340 ISOLD SVR TSTM over KCOU MOVG SWWD 10 KTS ETC. 7-1-7. Categorical Ceiling and Visibility Conditions a. Categorical terms, describing either reported or forecast general ceiling and visibility conditions, are defined as follows: 1. LIFR ... Ceiling less than 500 feet and/or visibility less than 1 mile. 2. IFR. Ceiling 500 to less than 1,000 feet and/or visibility 1 to less than 3 miles. 3. MVFR (Marginal VFR). Ceiling 1,000 to 3,000 feet…
Pilot's Handbook of Aeronautical Knowledge p. 2-8
Chapter 2: Aeronautical Decision-Making › Hazard and Risk › A = Aircraft
pilots evaluate the weather for a particular flight, they should consider the following: • What is the current ceiling and visibility? In mountainous terrain, consider having higher minimums for ceiling and visibility, particularly if the terrain is unfamiliar. • Consider the possibility…
Pilot's Handbook of Aeronautical Knowledge p. 12-25
Chapter 12: Weather Theory › Air Masses › Lightning
Ceiling and Visibility Generally, visibility is near zero within a thunderstorm cloud. Ceiling and visibility also may be restricted in precipitation and dust between the cloud base and the ground. The restrictions create the same problem as all ceiling…