Flight data recorders must keep the data and parameters recorded during at least the last:4
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For aeroplane certified before the 1 April 1998, cockpit voice recorder (CVR), when required, must keep the conversations and sound alarms recorded during the last:4
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When establishing an instrument approach procedure, 5 aircraft categories according to their speed at the threshold (Vat) are established. This speed is equal to the stalling speed in the landing configuration at the maximum certified landing mass multiplied by a factor of:4
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A category D aeroplane can carry out a circling approach only if the meteorological visibility is higher than or equal to:4
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A category C aeroplane can carry out a circling approach only if the meteorological visibility is higher than or equal to:4
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A category B aeroplane can carry out a circling approach only if the meteorological visibility is higher than or equal to:4
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A category A aircraft can carry out an indirect approach followed by a visual manoeuvre only if the horizontal visibility is higher than or equal to:4
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During a conventional approach, the Minimum Descent Height (MDH) is referred to the runway threshold altitude and not to the aerodrome altitude if the runway threshold is at more than:4
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According to the JAR-OPS requirements, an IFR flight with no alternate aerodrome can be undertaken only if the minimum weather conditions (VMC) are effective for at least:4
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An operator shall not operate an aeroplane unless it is equipped with a cockpit voice recorder which starts to record automatically:4
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