Re: Installed a helix mooring anchor last weekend...
Re: The helix anchor rig
The marina pool depth varies by 1 ft (plus or minus) depending on the prevailing wind and the river flow; which is regulated by a system of weirs and dams upstream. I felt fairly confident therefore just using a nylon rode from the eye of the anchor to the buoy and a slightly longer chain as back-up.
I would have prefered a bungee rode but was quoted about $1000 so I'll see how this set-up works for a while.
I don't really have any hard data to back me up; but I'm sure that if we had hurricanes here, the anchor would hold fast.