To comply with the approved airline Operations Manual in a twin-engine aircraft (1 h 45 min flight on 1 engine at an air speed of 420 KT to reach the alternate aerodromes in still air conditions), a pilot has to choose an ATC route, in Minimum Navigation Performance Specification area, while at the same time taking the shortest possible time.Given that the three alternate aerodromes taken into account are SHANNON, SANTA MARIA, ST JOHN TORBAY, the track to be chosen between PARIS and WASHINGTON will be:4
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In the MNPS (Minimum Navigation Performance Specification) area, a pilot should first of all take the following action in the event of a failure of the last inertial navigation system:4
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A pilot whose aircraft does not have MNPS certification has to fly via the SHANNON-GANDER great circle. The flight can be planned:4
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For an operation in MNPS airspace along notified special routes, unless otherwise specified, an aircraft must be equipped with at least:4
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The MNPS (Minimum Navigation Performance Specification) airspace extends from:4
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The MNPS (Minimum Navigation Performance Specification) airspace extends vertically between flight levels:4
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In the event of an en-route HF communication failure in an MNPS (Minimum Navigation Performance Specification) airspace, the appropriate VHF frequency for air to air communications is:4
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In the event of communication failure in an MNPS (Minimum Navigation Performance Specification) airspace, the pilot must:4
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The validity period of a nigh-time organised track system in MNPS (Minimum Navigation Performance Specification) airspace is normally at 30°W, between:4
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The validity period of a day-time organised track system in MNPS (Minimum Navigation Performance Specification) airspace is normally, at 30°W, between:4
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