The problem of the track function is caused by the basic error in the GPS system and by selective availability (SA). The problem is timing accuracy of the signals from the satelites and can't be fixed byanything in the receiver without receiving additional signals, i.e. using differential GPS (DGPS). Survey quality instruments get better accuracy by staying in one place during the fix and also by saving the data for additional processing later. This is a classic navigation problem, a time error translates into a position error of a certain distance. The faster you are going the smaller the error is compared to the actual movement. At walking and kayak speeds (also most sailing speeds) the basic errors of the system are large compared to the distance you are traveling in each update period (typically 1 second), so your speed and direction of travel displays are not very usefull. As for the display of waypoints, you are generally stuck with whatever the programmers thought was a good idea. If you can carry a computer then you can use a mapping/GPS display program to display things in any form you want. Unfortunately, this is not very usefull on a kayak underway. michael bhansen97_at_aol.com wrote: > > Woody - Garmin was amazingly available by phone today. The tech rep said the > tracking function does not work at speeds lower than about 3.3 knots. *************************************************************************** PaddleWise Paddling Mailing List Submissions: paddlewise_at_lists.intelenet.net Subscriptions: paddlewise-request_at_lists.intelenet.net Website: http://www.gasp-seakayak.net/paddlewise/ ***************************************************************************Received on Fri Mar 26 1999 - 02:57:24 PST
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