Ed
I found mention of it on a navigation tech site. No practical facts to ad to the great detail you blokes have already other than that comment in an historical overview of various early systems before it launched into the subsequent progress of the art to the present time.
There appear to be many systems tried and actually produced by various countries but, as far as we know, nothing seems to have reached universal daily operation until the inertial systems and subsequently GPS.
I did not bookmark it (and I clear my history daily) but will have a look to see if I can get it up again.
Lang
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