Hmm this sounds a 'Good Idea'; lets keep an antiquated Hyperbolic navigation system around and use it as a back up for the GPS constellation. Ohh look no one else in the world has LORAN except us so we will tell everyone else to go out and knock up several hundred Master/Slave ground stations since we think it will make our lives safer - we will ignore Glonass and the up and coming Galileo which we don't have control over since it is NIH.
Oh I almost forgot - it is so much easier to jam/disrupt GPS than LORAN since LORAN is such a wonderful hardend piece of 1940's equipment.
BTW have you seen the difference in orbital altitudes between a GPS SV and a tired old 'Great Wall Industries' clapped out satellite?
Excuse the excessive sarcasm Gentlemen, but please just pull the plug on LORAN, it's not required anymore.
TOD