Bristol Harbor Group, Inc. was contracted by Conrad Shipyard in Amelia, LA to design a 120’ x 40’ x 18.5’ twin-screw, ocean service tug. The tug is part of an ATB unit that is operated domestically and internationally to support the continually expanding shore bases as well as offshore operations. Computational fluid dynamics (CFD) and finite element analysis (FEA) were used extensively during this project. The purpose of the FEA study was to assess the stern scantlings of the barge in way of the INTERCON ladder interface. Similarly, FEA was performed on the tug structure to assess the maximum stress in way of the INTERCON load box. CFD analysis was performed to determine the calm water resistance of the combined unit and optimize the tug forebody and stern rake geometry of the barge.

Dimensions: 120’ x 40’ x 18.5’
Main Propulsion: Two (2) CAT 3516C Engines
Gears: Reintjes WAF-1173 with flexible coupling
Propellers: Stainless Steel
Generators: Three (3) John Deere 150kW Generators
Outfitted: INTERCON C Series ATB Coupler System
Classification: ABS A1, AMS, ABCU, Oceans
Towing Vessel Unlimited Service
Certified Under SOLAS/IMO/MARPOL
Designer: Bristol Harbor Group, Inc.
Builder: Conrad Shipyard, LLC, Amelia, LA
Owner: John W. Stone Oil Distributor