Hi all, Back in the spring I was looking for Catalina 30 Mark II. Ended up finding a nice 1985meal Mark I. Surveyor said mast needed to be grounded to a thru hull grounding plate. I thought the Catalina 30 is grounded to the keel through one of the shrouds. Can anyone shed some light on this? In any case I'm happy the search is over. I really like the boat. Thanks. Tom