F900 I am sure things get lost in translation. I would agree and of course have nav skills and use them to fly helicopters vfr and without gps but what I am trying to say not very well is that in general I admit virtually all my fixed wing flying I do rely on GPS and suddenly finding a complete failure in a cirrus with only a compass left in IMC would be a challenge I would prefer not to face or to rely on my DR skills in this situation and therefore carry a back up GPS for this very unlikely event.
there is nothing superior about it.
I agree it was typo
It was mean't to read that the commercial guys, military and those with an interest in traditional navigation techniques have superior DR skills.