[LW] [LW11] spx10 p70 heading error h2183

[madjonny]

seatalk ng system
spx10 course computer
i70 mfd
p70 auto pilot display
pb200 weatherstation
h2183 airmar heading sensor
A78 mfd
so initially used the pb200 for heading sensor but erratic reading as too high p (mast head) added additional airmar h2183 in the centre of the boat at water level (very stable reading) sucessfull calibration
heading appears correctly on i70 a78 but not on the p70 as i guess its taking its reading from the spx, the spx for some reason seems to have had the fluxgate removed but does have a ruuder ref, does anyone know how i can get the p70 and spx to use the available heading generated on the seatalkng network any help would be much appreciated xxxx