[CA] [CA11] Old Nautech Limited Autohelm ST4000 control head died

[Chuck - Raymarine - Moderator]

Welcome to the Raymarine Forum Randy,

Please note that the ST4000/ST4000+/ST5000/ST5000+ products are not simply autopilot control heads. These products function not only as the autopilot's control head, but also as the autopilot's course computer. Failure of a ST4000/ST4000+/ST5000/ST5000+ would necessitate replacement of the autopilot. Please note that the drive unit and rudder reference transducer which are currently interfaced to a ST4000/ST4000+/ST5000/ST5000+ may instead be mated to a compatible Evolution autopilot ACU. Should you provide the model of autopilot drive unit which is presently interfaced to the ST4000, then it may then be possible to specify an Evolution Core Pack (EV-1 CCU, ACU, p70S/p70RS autopilot control head, and Evolution Cabling Kit) which may be used with your currently installed drive unit.