[CA] [CA11] i70s and rudder angle gauge display not available

[tmarks11]

My i70s won't allow me to set up a display with a rudder angle gauge on it. I can select the numerical rudder angle, and that works fine and shows data, but the two different "gauge" displays for rudder angle are grayed out and if I try to select them it beeps angrily at me.

I have an S1 autopilot with rudder position sensor attached to it, running SeaTalk1 to two ST50+ (wind and depth) and the ST6001+ autopilot head. Depth/Wind/Speed transducers are connected to an ITC-5, which is connected to the i70s and to the ST6001+ via a SeatalkNG-Seatalk1 junction.