Markey ARR Winch System: Tried & Tested in the Toughest Tug Challenges
For more than 30 years, Markey Machinery has worked with the LNG and marine transportation Industries with the goal of developing winches designed to work under the most challenging conditions. The effort includes extensive design shop testing and actual commercial work, a combination that has ultimately produced an understanding of the operational issues facing terminal and tug operators. The many milestones in the development of Markey’s Asymmetrical Render/Recover (ARR) – technology by which hawser winches are able to maintain mean line pulls up to the bollard pull of the tug – came over a period of time that spans 25 years. The initial 20+ years of hawser winch design and Render/Recover development followed a traditional design path, influenced, in part, by market pressures.
Moran Commissions 10th Z-Drive Tug
Moran Towing has commissioned Diane Moran, its 10th Z-drive tugboat, which was recently christened in a ceremony in New York Harbor, will be used in harbor services. Currently, Moran's other Z-drive tugs are used by the U.S. Navy's Military Sealift Command in Norfolk, Va., and for harbor services in the port of Charleston, S.C. The vessel is powered by two turbocharged EMD engines, which were chosen for their fuel efficiency, reliability and full compliance with the most recent environmental regulations. The engines deliver a total of 5,100-hp at 900 rpm, driving Z-drives with eight-ft. stainless steel propellers. With a service speed of 13.5 knots, the vessel has a bollard pull of 152,000 lbs. Its bow is equipped with a Markey electric hawser winch, with a drum capacity of 400 ft.
