Packing gland coming out of top of rudder tube!
I am in shipyard this week and removed my rudder today. The stuffing box should be firmly and permanently attached to the top of the lower rudder tube and it should have been glassed in to the area surrounding the tube.
I think Catalina is the best shot for real solid repair info unless you have a boatyard you trust with experience on this issue.
Also try Catalina National Org : http://www.catalina38.org/