An aircraft flying at flight level 370 (FL 370) on MNPS Airspace is unable to continue flight in accordance with its air traffic control clearance (degradation of navigational performance requirements, mechanics troubles .... etc), but is able to maintain its assigned level (FL 370), and due to a total loss of communications capability, could not 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 the subsequent action will be, turn to acquire and maintain in either direction a track laterally separated by 30 NM from its assigned route and :
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