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Old 21st Mar 2010, 01:21
  #163 (permalink)  
Join Date: Mar 2000
Location: Arizona USA
Posts: 8,572
In the 50's the Decca installations in New York Airways helicopters included the unique 'roller map' displays that enabled the pilot to see his position at a glance, a concept unfeasible with VOR/DME
I personalty have first hand experience with Decca, off watch.
We had two aircraft fitted with these in Southern California (LosAngeles area) in worked quite well, however, it was expensive to operate, and...when you went off the roller-map, then what?
Where were you?
Then, often times, the rollers would jam, and the whole contraption ground to a halt.
A good idea, a bad execution.
And, just whom were last to embrace GPS?
The British...due to the 'not invented here' syndrome.
Or, was it Hoffman's revenge...again?
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