Arriving at the point of entry into MNPS (Minimum Navigation Performance Specification) airspace (except Shanwick Oceanic) and not having yet received the oceanic clearance, the crew:4
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Minimum Navigation Performance Specification (MNPS) airspace of the North Atlantic is defined within:4
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Penetration into the NAT MNPS airspace is:4
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The North Atlantic airspace is regulated according to:4
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In the Airspace where the MNPS is applicable, the vertical separation that can be applied between FL 290 and FL410 inclusive is:4
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An aircraft flying at flight level 370 (FL 370) in MNPS Airspace is unable to continue flight in accordance with its air traffic control clearance but is able to maintain its assigned level (FL 370), and due to a total loss of communications capability, cannot obtain a revised clearance from ATC.The aircraft should leave its assigned route or track by turning 90° (90 degrees) to the right or left whenever this is possible, and turn to acquire and maintain in either direction a track laterally separated by 30 NM from its assigned route and:4
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An aircraft flying above FL 410 in North Atlantic (NAT) Airspace is unable to continue flight in accordance with its air traffic control clearance, but is able to maintain its assigned level, and due to a total loss of communications capability, cannot obtain a revised clearance from ATC. The aircraft should leave its assigned route or track by turning 90° (90 degrees) to the right of left whenever this is possible, and turn to acquire and maintain in either direction track laterally separated by 30 NM from its assigned route and:4
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An aircraft operating within MNPS Airspace is unable to continue flight in accordance with its air traffic control clearance, but is able to maintain its assigned level, and due to a total loss of communications capability, cannot obtain a revised clearance from ATC. The aircraft should leave its assigned route or track by turning 90° (90 degrees) to the right or left whenever this is possible, and turn to acquire and maintain in either direction a track laterally separated by 30 NM from its assigned route and climb 1 000 ft or descend 500 ft, if:4
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An aircraft operating within MNPS Airspace is unable to continue flight in accordance with its air traffic control clearance, but is able to maintain its assigned level, and due to a total loss of communications capability, cannot obtain a revised clearance from ATC. The aircraft should leave its assigned route or track by turning 90° (90 degrees) to the right or left whenever this is possible, and turn to acquire and maintain in either direction a track laterally separated by 30 NM from its assigned route and climb or descend 500 ft, if:4
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Flight crew members on the flight deck shall keep their safety belt fastened:4
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