From: "Stephen Wan" <Steve_at_OlsonArchitect.com> > >>That sounds intriguing and useful - Could you tell us more about the > >>technique of triangulation? > > By using directional antennas and signal strength meters, one could find the > general direction that the transmitting signal is coming from. With 3 or > more ships or aircraft in different locations, they can plot on a map, the > separate bearing readings from each position. Where the lines intersect is > the general area the the signal is coming from. The Canadian Coast Guard has many ground stations around the Great Lakes (presumably, so does the US) and can do triangulation easily. In fact, when I took my Restricted Operator's Certificate (Maritime) course this past spring, the instructors made a point (more than once) of advising folks not to use the radio _and_ try crossing the Canada-US border in their boats. They pointed out that these areas are monitored and that the monitoring has likely been stepped up in the past year. I'd also assume there are similar capabilities in the Pacific (BC-Wash.) and Atlantic (NB/NS - Maine). It's a useful feature for SAR and a security feature in both the so-called drug war and for fear of terrorists. Mike *************************************************************************** PaddleWise Paddling Mailing List - Any opinions or suggestions expressed here are solely those of the writer(s). You must assume the entire responsibility for reliance upon them. All postings copyright the author. Submissions: PaddleWise_at_PaddleWise.net Subscriptions: PaddleWise-request_at_PaddleWise.net Website: http://www.paddlewise.net/ ***************************************************************************Received on Fri Sep 13 2002 - 08:00:04 PDT
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