Hi Gary, this "threat" from light squared has been a topic for quite a while. When you look at the technical details it is very benign. GPS is inherently immune to a high level of interference due to the spread spectrum nature of the signal (processing gain of 1000 or 30dB). You can always hypothesize a situation where you could jam even a highly resistant system like GPS but these situations tend to be very pathological. The next block of GPS that is under development is even more resistant to interference, as it is targeted for use by commercial airliners. There is not a great understanding of GPS (or Assisted GPS, reference the erroneous statements in the latest practical sailor article on Nav apps) but bottom line is that I would not worry too much about GPS being compromised. Go sailing with no worries! Robbin On 2/1/2012 12:14 AM, GILASAILR@aol.com wrote:
_Click here: Coalition to Save Our GPS_ (http://saveourgps.org/)
Conflicting use/frequencies may have an effect on the viability of GPS in the near future - see link for more info.
From "Scuttlebutt".
GO