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Anchor handling, towing and supply vessels, or AHTSs, are used to set anchors for drilling rigs and tow mobile drilling rigs and equipment from one location to another. In addition to these capabilities, AHTSs can be used in supply, oil spill recovery, tanker lifting and floating production, storage and offloading, or FPSO, support roles when they are not performing anchor handling and towing services. AHTSs are characterized by large horsepower (generally averaging between 8,000-18,000 horsepower), shorter afterdecks and special equipment such as towing winches.
 
 
LOA (m) Vessel Name kW Bollard Pull Deck Cargo (mt) Clear Deck Area (m) Liquid Mud (m3) Bulk (m3) Region
73.76 Northern Challenger 11,650 168t 1200 41.75 x 13.41 462 284 North Sea PDF
73.76 Northern Chaser 11,650 166t 1200 41.75 x 13.41 462 284 North Sea PDF
73.76 Northern Corona 11,650 168t 1200 41.75 x 13.41 462 284 North Sea PDF
73.76 Northern Crusader 11,650 168t 1200 41.75 x 13.41 462 284 North Sea PDF
79.55 Northern Commander 9,850 155t 1400 42.36 x 14.93 635 284 North Sea PDF
64.61 Northern Comrade 8,313 130t 650 36.57 x 10.97 184 227 North Sea PDF
     

 
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