Great input everyone. Especially Dan and ?WILAX? (who is that masked poster who posts knowledgeably and drives too fast?). I have little more input to help with this conundrum, but I'll try to at least guess. <Multipath usually shows up as a jump. Question, were you docked when you did these tests?> No, the ones involved (a friend and others in a class) were actively sailing about, practicing navigational and sailing skills. <Was there a lot of stuff around like buildings, bridges etc?> I assume no closer than 1/2 to 1 nM. But even if, they would be moving away and toward. <The antenna system had failed and the unit was dead reckoning.> Wouldn't the officer on watch (or previous watch) have needed to manually initialize the unit to start DR? I never heard of a GPS doing DR, so I assume you are referring to some fancy nav system which integrates a GPS receiver for obtaining fixes? <Are you SURE this unit was actually LOCKED onto the constellation?> Nope. <Finally, how was altitude being determined? Was it entered manually and you were navigating in 2D mode or were you resolving lat/long and altitude?> Huh? Sorry, I'm the dummy who asked the question. Actually, the handhelds were confirmed (supposedly) as being accurate. Since the console unit was mounted in a sailboat rather than an RV or helicopter, I would be surprised if anyone ever dinked with the altitude setting after initial installation. Of course, its precisely because it should always be set for sea level + antenna height that nobody would ever think to check it, and since no instrument is idiot proof. . . <Finally, finally, some units have an oscillator offset check in the service screen. There is a tolerance for offset on some units....maybe this unit is .....broken.> Could be, but your analytical skills are functioning. Thanks Harold So. Cal., so impressed - thanks guys. *************************************************************************** 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 Mon Mar 15 1999 - 21:17:14 PST
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