Thanks everyone! Really helping information going on in here, thanks again.
Sar, thats an interesting point and would be nice to experiment what happens taking off in ATTI mode with a wrong compass and then switching to P-GPS. By the way, what version of firmware/Assist are you using?
Lopez, that's a nice boat. How severe is your compass anomaly when taking off? Do you have any issues with the radar, do you switch it off? The thing is the one I'm saliling in is full of electronic equipments and have 2 radars, don't know of that could make a difference. I've been reading a lot today in this forum and found some people having issues when flying from vessels.