Personal navigation - 90 year old instead of GPS
Interestingly, as can be something to learn about the navigation systems for vehicle owners 90 years ago? Were they in general? Or, may be travelling preferred audited centuries paper maps, tips connoisseurs terrain and passers?
Answers to these questions may give one of the pioneers of personal navigation device Plus Fours Routefinder, developed over 90 years ago for the British market. Of course, this model opportunity play MP3 files, video, pictures and FM-radio could not brag, she even did not touch the display. However Routefinder clear advantage is its size (the device is mounted on the wrist, so problems with the management navigator does not arise), and the opportunity to work with a whole set of maps. As we can see, the essence of the complex simple - there are 2 rods, one of them wound paper map of the area and the terrain. During movement of the user otmatyvaet necessary maps and thus gains access to the necessary orientation. Judging from the photo, complete with navigator delivered a set of maps of various regions and roads.
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