ST4000 plus compass missing

[Lost Parent]

Just purchased a used st4000plus missing the fluxgate compass
What fluxgate compass should I be looking for or will any from other models work ?

 

[kappykaplan]

Lost, when I upgraded to a linear drive, we kept the fluxgate compass from the XP-5 installation the previous season. This would seem to indicate that a Raymarine fluxgate is a Raymarine fluxgate.

 

[kloudie1]

As long as it is a Raymarine, I think it will work with the 4000..
http://www.ebay.com/bhp/fluxgate-compass