How can expanding filling gas be released in case the filling port of a gas balloon cannot be opened during cruise?4
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What has to be expected during descent above a heated water surface?4
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What has to be considered before a balloon ride across water surfaces?4
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Environmental air temperature and filling gas temperature are the same. Now, the free balloon descents into warmer air. What statement is correct?4
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What has to be considered at moderate wind speeds during a balloon ride across mountainous area with cloud-free sky?4
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During a balloon ride, visibility continiously becomes poorer, also cloud base decreases in direction of the current track. How should the balloon pilot react to this situation?4
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Under which conditions, no harzards should be expected for a balloon ride?4
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What wind conditions should be expected in the vicinity of showers or thunderstorms?4
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How may passengers assist the balloon pilot during landing preparation?4
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What are primary criteria for selecting a landing site? 1. Obstacle situation 2. Elevation of the site 3. Strength of surface wind4
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