Re: ST80 Shows No Difference Between True/ Apparent Wind
Yeah, someone screwed the wiring. And it does need knotmeter input to calculate the difference in the TWS/AWS. Look for a broken wire. if you are lucky, it is not IN the mast but somewhere in the cabin. If nothing is obvious, you'll need a schematic and multimeter to pin it out.
Or a call to Raymawhosis, whatever their name is this year. Amazing, you can call toll-free tech support, from a boat, without paying $4/minute to the High Seas Operator.