G'Day Doug and Craig, It seems as if there is quite a bit of variability in what is available. >From what Doug says the facility would be useful in a working harbour or near shipping lanes subject to fog (or smoke from bush fires in the case of Sydney Harbour). You've encouraged me to ask our local volunteer coast guard and see what they know about availability of triangulation information in foggy (or smokey) conditions. Craigs description suggests the bearings are likely to be calculated from an array of directional aerials rather than physically rotating an aerial, which makes sense of the fast speed of response. Last time I remember thinking about this was in early 1960's when reading "Practical Wireless":~) Thanks again for the information. All the best, PeterO *************************************************************************** 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 Wed Sep 18 2002 - 13:41:10 PDT
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