Practical Sailor dropped seven different lengths of 5/16 mooring chain in Long Island Sound 2 1/2 years ago. We reported on the initial inspection and the one-year inspection. After a quick look at the chains at the two-year mark, we left them in the drink for another six months and then pulled them. During the test, all chains had the upper parts exposed to air twice a day and were subjected to constant wear from waves and tidal changes. When we retrieved the chains for the final time, we found the greatest loss of material just below the halfway points in the 5-foot lengths. Chains we tested were Acco, Campbell,…