My Zeus2 uses COG from the integrated GPS. I don't have a magnetic compass feed but do I have TWD, VMG to Wind and Marker et all working The VMG is calculated using heading info. You have to know where to click the COG option in the options menu.
You can use the GPS based SOG as well. The reason it wants the paddle wheel boat speed info as well is to recognize and compensate for current and tides. You can PM me if you need more details on how it's done. It was not super obvious but after clicking around for a few minutes I was able to make it work just fine. -Francois Rivard 1990 34+ "Take Five" Lake Lanier, GA Message: 7 Date: Tue, 11 Aug 2015 23:00:54 +0000 From: Jim Reinardy <firewa...@reinardy.us> To: <cnc-list@cnc-list.com>, <cnc-list@cnc-list.com> Subject: Re: Stus-List Electronics upgrade Message-ID: <bay403-eas27154901d38c43b29663c35a1...@phx.gbl> Content-Type: text/plain; charset="utf-8" When I put in my B&G system I was surprised to figure out that not only did it need a knot meter for TWD, it wanted a compass transducer as well. The Zeus units won't use their internal COG data for the boat heading let alone speed. One other note about iPads. I recently chartered an older boat on vacation that only had an old 4" Garmin plotter below. I used my IPad Air successfully from the cockpit, but found that with the internal GPS on, it was draining the battery even while plugged in. Plus, plugging it in near the VHF created interference on the radio that made it unusable. This made me happy I have dedicated instruments! Jim Reinardy C&C 30-2 "Firewater"Milwaukee, WI Sent from Outlook
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