Military dictionary. 2000.
weather minimum — The worst weather conditions in terms of visibility, RVR (runway visual range), and cloud ceiling for landing at a given runway or landing field either under conditions of visual flying or of instrument flying. These conditions are prescribed by… … Aviation dictionary
Weather-related cancellation — or sometimes a delay is when an institution is closed or its opening delayed, or an activity is cancelled or postponed due to inclement weather conditions. Certain institutions, such as schools, are likely to close when bad weather, such as snow … Wikipedia
Weather map — Weath er map A map or chart showing the principal meteorological elements at a given hour and over an extended region. Such maps usually show the height of the barometer, the temperature of the air, the relative humidity, the state of the weather … The Collaborative International Dictionary of English
Weather station — (Meteor.) A station for taking meteorological observations, making weather forecasts, or disseminating such information. Such stations are of the first order when they make observations of all the important elements either hourly or by self… … The Collaborative International Dictionary of English
Weather ship — The weather ship MS Polarfront at sea. A weather ship was a ship stationed in the ocean as a platform for surface and upper air meteorological observations for use in weather forecasting. They were primarily located in the north Atlantic and… … Wikipedia
Weather Underground — Couverture du premier numéro d Osawatomie, journal clandestin publié par le Weather Underground à partir de mars 1975. The Weatherman, plus souvent appelés Weathermen, et devenu après leur passage à la clandestinité The Weather Underground puis… … Wikipédia en Français
weather modification — Deliberate or inadvertent alteration of atmospheric conditions by human activity, sufficient to modify the weather on a local or regional scale. Deliberate alterations include covering plants to keep them warm at night, seeding clouds to induce… … Universalium
Weather surveillance radar-57 — Antenne d’un WSR 57 du National Weather Service Le WSR 57 (Weather Surveillance Radar 1957) était le principal radar météorologique utilisé aux États Unis à partir de 1957 et pour une période de 35 ans[1]. Il s’agissait du … Wikipédia en Français
Minimum safety altitude — Altitude specified at the flight planning stage as the minimum altitude that can be descended to in order to maintain safe terrain separation. Generally, for VFR flight, a safe margin would be; Take a terrain elevation of 1,250 ft above mean sea… … Wikipedia
below minimum — Weather conditions below the minimums prescribed by regulation for the particular action involved (e.g., landing minimums, takeoff minimums). These normally pertain to visibility or RVR (runway visual range), cloud ceiling or cloud base, minimum… … Aviation dictionary
