I was just recommending a double-ended spring line, with a carabiner on the spring line and a harp latch on the boat, as an easy way to secure a boat to one's dock
Well ... ooops.
Take a good look at that harp latch. If it isn't self-locking -- if it screws in -- either check it after a lot of wind
or use seizing wire on it!
I didn't do that, and my anchor
just banged into the seawall. I came up and found that the latch part of the harp latch was gone and the spring line was dangling in the water
. I see no signs of stress on the harp, but we had a LOT of wind
earlier this week when a front came through, and I think the screw just worked itself loose.
Needless to say I tightened the spring line on the other side.