Unit 5: Aviation Weather, Effects & Sources Pt.2 100% Correct

Unit 5: Aviation Weather, Effects & Sources Pt.2 100% Correct ___________ is the 24-hour clock convention of time-keeping in which the day runs from midnight to midnight and is divided into 24 hours, indicated by the hours passed since midnight, from 0 to 23. This system is the most commonly used time notation in the world today. Military Time __________ clouds are rain clouds. _______means "rain." Nimbus clouds A ________________ (______) is a notice filed with an aviation authority to alert aircraft pilots of potential hazards along a flight route or at a location that could affect the safety of the flight. NOTAMs _________ refers to the condition of lacking transparency or translucence; opaqueness. opacity An ____________________ is requested by pilots whose departure time is 6 or more hours away. The briefer gives forecast information appropriate to the proposed flight route or operation. This assists the pilot in making an initial decision about the feasibility of such a flight. Outlook Weather Briefing OVC is the abbreviation for "__________" when used in METARs. Overcast (OVC) _________________-- forms when cold air moves over warm water... kind of like advection fog in reverse. As precipitation falls through air, it hits a warmer surface, like a hot pavement. The evaporative cooling leads to saturation and fog forms. There is usually not a lot of wind. Same as Steam fog. Precipitation- Induced Fog _________________- in aviation is a measurement of the greatest distance visible throughout at least half of the horizon, not necessarily continuously. To take the prevailing visibility, controllers reference a number of visual reference points: usually buildings, hills, or other geographic features. Prevailing Visibility A _________________ is a meridian (a line of longitude) in a geographical coordinate system at which longitude is defined to be 0°. Together, a prime meridian and its anti-meridian (the 180th meridian in a 360°-system) form a great circle. Prime Meridian _______________ mainly needs clear skies and cooling, moisture in the air, and light winds. With radiation fog, you get heat radiating from the surface at night which cools the bottom air until it reaches saturation.