Originally Posted by deefer dog
As someone who has flown the Atlantic in pre GPS days, and who regularly managed to make my coasting fix (NDB or VOR) without any undue concerns, what precisely is the problem you are alluding to?
There is no problem. This thread was started by a Serious Aviation Enthusiast, who just got done reading a Serious Aviation Book, wherein was detailed a Mysterious Aviation Procedure in the absence whereof said Serious Aviation Enthusiast became concerned for his life and limb.
Much hilarity ensued.