I burried a 4 foot long piece of steel, 3feet down, and that ripped out. Friend's boats that where held down with Dog Leash Tiedowns have never let go in more than 5 years.



Go to the pet store and get some of the Dog Leash Anchors, which look like a giant cork screw. These also work great to supplement whatever tie downs you have. Make sure the screw is burried deep into the sand, so that none of it is exposed.



With just one of these tied to the dolphin strker, boats seem fine with mast-up up to about 50mph, gusts to 60. You better drop mast for anything greater than that.



If you want to be really safe, tie one to the dolphin, and place one between each pair of boats, and run a trap wire from each side of the boats to those anchors. Not going anywhere!



As I found out, a shroud will act like a very nice hacksaw for anything that it lands on (like someone else's hull). A boat with mast down will do a hell of a lot less damage to itself and others.