That's a lot of BU's to get a heading. Personally, I'd stick with a fluxgate and use the leftover bucks for something else. Keith ----- Original Message ---- From: Tim Johnson tim@timandclair.com I am in the process of selecting the electronics to be installed in a Nordhavn 64 now under construction. My electronics vendor is recommending that I use a Furuno satellite compass for navigation input into the autopilot (Simrad AP 25s). These compasses are expensive (over $6K installed) and I'm not sure they are worth it. Any comments from members of this list would be appreciated.