GPS 1971

How far have we come. How many thousand tapes would you need?
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That's quite impressive given the technology at the time

Pretty sure Fords Big Red turbine truck had a map that moved as you drove along and kept you plotted in the correct spot at all times



Paul 

There is no way to insert any information into the tapes in real time. The question is:

If they are only good for a preset route and you felt the need to have one, you obviously drove the route regularly to justify the expense and if you did that you would know it like the back of your hand.

Useless for every day driving but ideal for tourist routes available from the council information centres. RACQ could rent them pre-loaded for long trips say Brisbane to Sydney.

How long does a cassette last, I can't remember but guess half an hour so anything over 40-40km would require sets of tapes.

Having said that I think it is great forward thinking technology of the time and the forerunner of what we have today - navigation any where any time to within a couple of metres.

IIRC the longest cassette was C90, 90 minutes.

From what I can remember of C90 tapes they had the horrible habit of winding tight which might throw your distance out and by the time you pulled it out and got your pen in it and loosened it you would have lost your place good and proper

Bluey

Lang wrote:

How long does a cassette last, I can't remember but guess half an hour so anything over 40-40km would require sets of tapes.


I think the tape lasts a lot longer than that 
From what I understood is the tape and the tape palyer  have stop and start and the car stops and starts the tape

The car is measuring distance and once a certain amount of distance is measured the tape player starts and plays the piece of direction