AFDB-7 Los Alamos Mooring Overhaul Holy Loch, Scotland

摘要

A major overhaul of the mooring system of the U.S. Navy Special Dry Dock LOS ALAMOS (AFDB-7) located at Holy Loch, Scotland. The purpose of the overhaul was to correct deficiencies noted during detailed inspection conducted in June 1982. Twenty-two mooring legs including 13,193 feet of 3'' stud link chain and 22 each 30,000 pound Navy stockless anchors were recovered and refurbished. Less than 3% of the recovered chain did not meet the minimum acceptance criteria of 2-1/8'' wire diameter and was scrapped. 11,693 feet of chain was reused to assemble 20 mooring legs which were reinstalled in a slightly modified configuration. The new location of the dry dock center is 681011.459M north, 217103.358M west (OSGB) on a bearing of 308 32'38'' which is 18 feet to the southeast of its pre-overhaul position. Pretensioning of the mooring legs was performed to yield bow and stern catenary angles of 50 and side catenaries of 70 for calculated nominal horizontal tensions of 20,000 and 5,000 pounds, respectively.