Morring 911
Justin makes a good point. My mooring was there for years, a mushroom and it was completely buried so only the ground tackle was visible. During hurricane Bob I went down right after the storm. The seas were very confused as I dinghied out to quinn mary. the boat next to mine was upside down with her outboard submerged. I was surprised when I got on the boat (a difficult task with the sea state) to find that the friction from the motion had actually started to melt the fibers in the mooring pennant. Luckily I had a backup and these lines were probably 3/4 to 1 inch on just a 25 foot catalina. Use chafe protection if you can install it. dave