The first question, then, is: Will your mooring hold? As a result of numerous moorings being dragged during recent hurricanes and northeasters, a search has been underway for a more secure mooring anchor. A study by the BoatU.S. Foundation, Cruising World
magazine, and Massachusetts Institute of Technology (MIT) found that a 500-lb. mushroom buried in mud could be pulled out with 1,200 lbs. of pull (supplied by a 900-hp tug); an 8,000-lb. deadweight (concrete) anchor could be pulled out with 4,000 lbs. of pull. A helix morring, however, could not be pulled out by the tug and the strain gauge recorded 12,000 lbs. of pull—its maximum—before a shackle was burst apart by the strain. Scope in each case was slightly less than 3:1. (In another helix test, a strain gauge had
registered 20,800 lbs. before the hawser snapped.)