On Wednesday, February 27, 2013 5:28:34 PM UTC+1, Matt Herron Jr. wrote:
I agree that GPS is a military system. Two military systems really. one Russian and the other American.

Well, no. The GPS system that we all use and love is the US military system. GLONASS is the soviet/russian copy. There is also a Chinese satnav system being installed, and Europe has been developing it's own system (so as to not rely on the US military) for a long time.

You can get receivers that use multiple systems, but don't think any are in use in gliders.

Agree that the US govt has committed itself to the peaceful, civilian use of GPS. But that doens't change the fact that it is a critical military system, and must be treated as such.

Kirk
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