On Thu, 18 Dec 2003 21:40:13 -0500, Ray Drouillard wrote:

"pervect" wrote in message

Denying the US use of GPS would have a negative impact on US military
capability, but it would not eliminate it.

Even if the non-encrypted civilian access GPS is turned off, the
military system will work fine.

Not entirely. Older military GPS receivers use the less
precise civilian signal to get a coarse position fix before
they lock onto and receive the military signal. If the
civilian signal was turned off entirely, these receivers would
either take an extremely long time to initialize after being
turned on, or would not be able to get a position at all.


ljd