Basic principles
For pilots:
I still don't feel, despite the incredibly informative discussion, that I've completely graduated from Erebus 101. In previous posts I've made the assumption AINS is not as reliable as ground based navigation aids; and therefore is inadequate as a substitute for the purpose of a descent below MSA . Would all the pilots here agree with this? I believe the operative assumption of most pilots is "yes, it's not as reliable." If so, could one of you kindly spell it out in detail for us bystanders. Why specifically is it more dangerous? Is it the "drift" factor, the need to enter coordinates, or something else?
Thank You