Inatypicalsystem,magneticvariationbetweenlatitudes73°Nand60°SisstoredintheIRSmemory,anddatacorrespondingtothepresentpositioncombineswiththeaeroplane’strueheadingtodetermineitsmagneticheading.TheIRSistheaeroplane’snormalsolesourceofattitudeandheadinginform (共 579 字) [阅读本文] >>


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