Originally Posted by sailingdog
Adding a half hitch to the tail of many knots will make them a good deal more secure.
Indeed. My wife showed me how her family used to tie up the family yacht to pilings: A clove hitch with a half hitch atop it. I've got a short piece of plastice pipe I'm using for practice. The clove hitch alone isn't very secure on that. (It's slippery.) But adding that half hitch makes it quite secure.