system has mandatory chart plotter and optional controller ( control head
- which includes programming facility too ) . Any one unit can help to update this system , collectively . Device list selection from your configuration is normally auto select . Manually , we can select or see the equipment's status too . When more than one heading sensor
units are integrated with network ( NMEA
) system - we choose priority among them or to dedicate one equipment
for this requirement .
Perhaps , your device was not in device list for auto pilot or selection needs to be checked again . May be , I have not understood your question as well . Without relevant heading indication , symbol appears or without straight line - you have boat's heading ? For my understanding , please .
Page 23 of User manual gives a picture . Do you mean in this detail ?
Page 71 gives the chart compass details with a note that this function will not be available when cursor is active in display . Is this function with " Hide " option ?
Please refer from this manual so as to work
out well . Regards .