Mary,

I've used a screw anchor similiar to the trailer house tie-downs with the exception of the shin busting bracket at the top. The ones I've used have an eye formed with the shank of the screw. The shank is about 3' to 4' long with a 6" diameter screw section for driving into the ground. A pipe wrench or rod inserted into the eye of the shank helps to screw it into the ground. This works better in sandy areas like a beach because of the torque needed to screw something that size into the ground. Four of these held my Stiletto down during the last hurricane here (even though the eye of the storm was 50 miles east) without it moving.

My first one I made about 18 years ago because I couldn't find one to buy. Now a local vendor (like Home Depot) handles both types and different lengths. For my past Hobies I used just one between the hulls tied off to the dolphin striker or mast step with good results. A snug tiedown would keep it from moving in all but the worst wind.

Clayton