Quality Assurance of the Modified Class CC Mooring Installation at Guam,
NAVAL FACILITIES ENGINEERING COMMAND WASHINGTON DC CHESAPEAKE DIV
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The mooring location is approximately 500 feet west of the existing 25N25S mooring. The mooring configuration is a three-legged array with two ground chains per leg as in a DM-26 class CC mooring. Each ground chain terminates in a pair of tandem anchors. At the other end of the six chains legs, the termination is at a common ground rign. A single 15,000 pound in water weight sinker is attached directly to the ground ring, and a 3.5 inch riser chain connects the ground ring to a 12 foot diameter buoy. The designed hawser form the buoy to the ship is a dual paralled 4.25 inch diameter Samson 2 in 1 nylon hawser. To install and maintain the moorings in Apra Harbor, PWC Guam uses a YFNB barge as work platform. The barges deck house has been cut off to provide a 140 feet clear work deck from the stern, forward, to accomplish their work on the moorings, PWC secured a 60 ton, crawler crane to the deck, left of the centerline and at the stern. To the right of the centerline, at the forward end of the work area, PWC secured a 3 drum 10 kip winch. Each of the drums wire ropes passes through its own 5-part block system. The crane and the 3 drum winch are the only pieces of machinery used by PWC to do mooring work.
- Civil Engineering