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happy-and-lost
February 3rd, 2007, 05:33 PM
We got a shiny new Sat Nav for Xmas, and whilst it is a wonderful little gadget, the possible implications of using it could be quite scary.

What I'm talking about is the fact that this little box tells a satellite where you are going to, where you've come from, (if you've set a default) where you live and what speed you're moving at. Now, I haven't read the smallprint that comes with the device, but couldn't all this information perhaps have a sinister ulterior use...?

Discuss.

staib
February 3rd, 2007, 05:42 PM
Does listening to the radio tell the radio station where you are?

If not, why should listening to GPS signals tell the satellites where you are...??

The biggest danger of satnavs in car is probably being distracted by them :lolflag:

But they are great - we crossed France last summer and didn't even take a map with us - they are very handy for "autoroute" intersections, as well as finding petrol/gas stations...

mips
February 3rd, 2007, 06:11 PM
We got a shiny new Sat Nav for Xmas, and whilst it is a wonderful little gadget, the possible implications of using it are quite scary.

What I'm talking about is the fact that this little box tells a satellite where you are going to, where you've come from, (if you've set a default) where you live and what speed you're moving at. Now, I haven't read the smallprint that comes with the device, but couldn't all this information perhaps have a sinister ulterior use...?

Discuss.

I honestly don't think you have any understanding of how satellite navigation works.

It is ONE WAY communication, the devise does not talk back.

BWF89
February 3rd, 2007, 06:27 PM
I honestly don't think you have any understanding of how satellite navigation works.

It is ONE WAY communication, the devise does not talk back.
But wasn't Richard Stallman up in arms awhile ago asking people to unhook OnStar Navigation devices from their cars because they could be used to track your location?

Rhubarb
February 3rd, 2007, 06:52 PM
If you bother to read the OnStar Navigation website, you'll notice that the OnStar system incorporates a cellular phone. It can let you make voice calls and can even send you an email.
And yes, if the OnStar system has a cellular modem (which they do), it could easily track and report back to big brother where you car is all the time.

Normal GPS units DO NOT have a cellular phone / modem.

I did hear somewhere that GPS units do transmit a little initially to download information about overhead satellites. But as I can't remember the source, and as I don't think the source was reliable, I tend to think that a GPS unit is solely passive. Like a normal FM radio.

While a GPS unit will get you from point A to point B, it's been proven many times that a human with a map can navigate a much more efficient route than a GPS unit.
(So long as the navigator can read maps that is!)

Mateo
February 3rd, 2007, 06:58 PM
It doesn't matter because the man is already tracking your every movement via high-definition satellites. Your only recourse is to never look at the sky and hope they lose track of who you are.

insane_alien
February 3rd, 2007, 07:00 PM
sat nav in cars is basically a GPS hooked up to some mapping software. all the GPS unit does is receive 3(though usually more) timing signals and satellite identifier signals and translates that into coordinates and altitude. it then sends the decoded information to the mapping software which handles the route you take.

Rhubarb
February 3rd, 2007, 07:03 PM
It doesn't matter because the man is already tracking your every movement via high-definition satellites. Your only recourse is to never look at the sky and hope they lose track of who you are.

Be safe, wear a sombrero outside ;)

insane_alien
February 3rd, 2007, 08:25 PM
Be safe, wear a sombrero outside ;)

preferrably one with an ubuntu logo on top :P

ssam
February 3rd, 2007, 08:40 PM
get a nokia n800, a bluetooth gps and maemo mapper.

tgalati4
March 22nd, 2007, 04:28 PM
By putting aluminum foil around the brim of the sombrero, you can block these pesky microwave/Satellite signals from scrambling your brain.

Also, check over your shoulder frequently. They are following you.



From a safety standpoint, it's more dangerous to fool around with a navigation unit while driving.

mcduck
March 22nd, 2007, 05:15 PM
By putting aluminum foil around the brim of the sombrero, you can block these pesky microwave/Satellite signals from scrambling your brain.

Also, check over your shoulder frequently. They are following you.



From a safety standpoint, it's more dangerous to fool around with a navigation unit while driving.

Not a good idea, aluminum foil hat could actually work like an antenna, focusing and concentrating those scrambling signals to your head. Try to get some radar-deflecting paint and create yourself a stealth hat instead.. :D

prizrak
March 22nd, 2007, 06:02 PM
As someone who has actually studied GPS units. This is how the GPS works. There is a number of GPS satellites orbiting the planet (can't remember how many, it's a fixed number) each sends out a signal with the time encoded (as well as where it is). The reciever on the planets surface uses a signal of 3 or more (3 for flat more for 3D positioning) to calculate your position by calculating the time difference between when the satellite sent the signal and when the reciever recieved it. It's basically triangulation. No data is being sent up to the satellite and in fact most units don't have the power to send it back.

Cell phone GPS works differently in one way. It sends it's location updates to the cell company through the cell network (tho you can be triangulated with cell sites just as well), which is where the RMS like issue of privacy comes in.