Here's one problem I know the answer to:
"Problem # 6:
This is another ARPA problem. If you lock onto a target, then shut off the autopilot
, the ARPA vector swerves off about 90 deg from the actual course of the target. These two systems should have nothing to do with each other. Why turning off the AP impacts ARPA is beyond me, but it does. A friend tried the same experiment
on his Simrad equipped boat and got the same results."
The pilot is capable of making all kinds of navigational calculations including TWA, TWS, COG, SOG, and many others. This is a relic from the days when the pilot was the only smart device on board, and probably continues so that it is possible to run a network without a plotter on it.
I also had different problems from the pilot making these calculations differently from the MFD, including a persistent and annoying "wind shift" alarm
when using the pilot in wind
The cure is to shut down those functions in the pilot setup menu. I'm sure that's what this problem was, although I guess it doesn't matter to you anymore since you've gotten rid of that equipment
. Maybe useful for someone else.