ATSC 113 questions with correct answers

Above Ground Level (AGL) - Answer lowest cloud base that is below 20 000ft that is covering more than half the sky (broken or overcast) Broken Coverage - Answer 6-9 oktas ceiling - Answer the altitude of cloud base for the lowest cloud with coverage ≥ 5 oktas (i.e. lowest broken or overcast clouds) is considered the ceiling, If a layer of clouds covers more than half the sky WMO - Answer World Meteorological Organization IFR - Answer Instrument Flight Rules. Rules governing the procedures for conducting instrument flight. Cloud Base is less than 1000ft AGL and visibility is less than 3SM Oktas - Answer A measure of cloud cover. overcast - Answer covered with clouds 8oktas Vertical Visibility - Answer there are such poor visibilities at ground level that a ground-based weather observer cannot see whether there are any clouds or not, then ceiling is reported as the vertical visibilityWM VFR - Answer Visual Flight Rules. Rules that govern the procedures for conducting flight under visual conditions. Cloud base is more than 3000ft and visibility is more than 5SM