Petroleum and Chemical Transportation

750 Class Articulated Tug Barges (ATBs)

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The newest of Crowley’s ATBs, these 750 class vessels have the largest carrying capacity and contain features that are redefining the ATB industry.  By 2013, Crowley will have three 750 class ATBs operating in the waters of the U.S. Gulf Coast for a major oil company.

750 Class ATB Fleet

Legacy / 750-1

Legend / 750-2

Liberty / 750-3

750 Class Design Highlights

  • 327,000 barrels at 96% capacity

  • Twin-screw 16,320 hp tug with Intercon notch connections

  • Proven design for full ocean service; the robust Intercon notch connection system enables U.S. Gulf to West Coast, U.S. Gulf to East Coast, and Inter-West Coast trading capabilities

  • Unit is designed to carry petroleum products, heated cargoes and EZ chemicals to provide maximum cargo flexibility

  • Barge built under ABS SafeHull program for maximum environmental protection, which puts the vessel design through extensive review to identify and strengthen the vessel structure

  • Meets full SOLAS criteria for enhanced crew safety

  • Redundant steering system with oversize rudders for maximum handling capabilities

  • Double-hull configuration

  • Transfer rates of up to 30,000 barrels per hour

  • Cargo pump in each of the 14 cargo tanks to assure maximum cargo integrity and segregation flexibility

  • Remote radar gauging in all cargo and ballast tanks

  • Remote operated ballast system to enable the vessel to exchange ballast at sea while underway

  • Dual-mode inert gas vapor collection system for maximum safety, with a layer of inert gas covering the product in the tank to make the tank atmosphere too lean for combustion

  • Two hose-handling cranes with 10-ton safe working load

  • Enhanced mooring system featuring 1,000 feet of Spectra-type lines on split drums with a high-speed recovery rate of 100 feet per minute

  • Two anchor windlasses each equipped with 10 shots of chain for offshore mooring operation

  • Barge meets OCIMF and ISCOTT requirements

  • Fixed cleaning system to easily handle cargo changes

  • Barge equipped with fully independent firefighting system

  • Enhanced firefighting system including fixed Co2 for all machinery spaces and foam coverae system for the cargo manifold area

550 Class ATBs

650 Class ATBs