Wouter van Ooijen wrote:
> > And from what I
> read Loran C can be better than 50-60 meters in repeatability (!=
> accuracy), which is what matters for a roaming robot.
>
>   
Well, I can confirm it from experience for you.  I use Loran C all the 
time, in fishing, and once you find a spot and have the Loran C 
coordinates for  that spot, you can go back to it with great accuracy.   
What you cannot do is go to a spot for the very first time (using just a 
chart with Loran C coordinates superimposed upon it) with accuracy.

So far as the government stopping support, they have been threatening to 
do that for a long time now here in the U.S. but have not yet done so.   
There is a fairly well-organized coalition of fishermen (both commercial 
and recreational) who lobby for continuation of the service.  And it 
doesn't cost that much to maintain the stations.  The real problem is 
that it is almost impossible to buy new Loran C receivers any more, so 
people are trying their best to get all those Loran C fishing spots 
converted to GPS fishing spots.  Once that is far enough along, then I 
would guess that it will gradually be phased out.
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