SIMRAD AP21 control unit w/accy, manual:  p/n 22086284
 BRAND NEW old stock, in factory box
* 23' cable w/male Robnet plug
* Add to existing AP20/AP22 system for Flybridge autopilot control
* Replace a defective AP20 or AP22 control unit
 
* Replace a defective AP300X control unit:
   - Single station AP300X system only
   - Junction unit software update may be required
   - Email for full details