Brusco Tug & Barge, Inc. of Longview, Wash, has awarded of the construction contract for a new 78 ft.
(23.8 m) Z-drive tug to Diversified Marine, Inc. of Portland, Oregon. This new tug is the seventh in the series of the ASD 23/35 high-performance, lowmanning tug design developed by Robert Allan Ltd.. and incorporates several new features reflected in the ongoing development of this class of modern high-performance ship assist tug.
The most significant change to the design is the increase in power installed in this tug design since its initial development over 20 years ago. The tug has been increased to provide greater stability, and the tendering system has changed significantly to reflect both the higher power, and changes in fender and hawser technologies.
Powered by two Detroit Diesel Model 12 V4000 electronically-controlled diesel engines, each rated at 1,800-bhp driving Ulstein Model 1350H Z-drives, the tug is equipped with a hydraulic towing winch supplied by Markey Machinery, which has a "render recover" feature.
The tug is scheduled for delivery during the fourth quarter of 2000. at which time it will be put to work in Port Hueneme, Calif.
to provide greater stability, and the fendering system has changed significantly to reflect both the higher power, and changes in fender and hawser technologies. During the two decades of development and refinement to this particular Robert Allan Ltd. design, six tugs were built and are presently
heavy chain with those of a nylon rope pendant. A surge pendant is an energy storage device typically located between the towing bridle and the towing hawser. They are used with wire towing hawsers where desirable to reduce the scope and catenary depth of the hawser without reducing the overall energy storag
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
braided rope, offer significant advantages, including easy adaptation to all kinds of ships and barges, highly secure mooring through the use of taut hawsers, absorption of surges without high tension, and significant vertical changes with respect to the pier can be made without readjustment of the hawsers
Compensation systems, independent drives for each drum and standard foot pedal for hands free operation. The Winch has the capacity to spool 600’ of 9” Hawser, 18 Ton line pull and a line speed of 100 FPM. www.marinewinch.com (As published in the January 2014 edition of Marine News - www.marinelink.com
will be supplying the deck equipment to East Isle Shipyard in the first quarter of 2001. Timberland's scope of supply consists of two series 651A Hawser Winches, one series 353H, 24 in. Hydraulic Capstan and a 160HP Diesel/Hydraulic Power Unit per shipset. On the bow, two Timberland series 651A
tug is fitted with a WYW-20-48 hydraulic combination winch/windlass with a 1.25-in. anchor wildcat, and soft-line storage drum. Adjacent to the main hawser winch is a type DEPC-42 electric deck-winch for 350 ft. of soft-line, used for tie-up and basic barge-work (thus protecting the main line from
with ABS, USCG, and IEEE-45 standards. The tow winch is part of a two-winch suite of equipment that also includes a Markey Model DEPCF-52- 75HP Class II Hawser Winch. Together, the two winches will share a single VFD drive panel and dynamic braking resistors, while having discrete wheelhouse controls for each
35-foot covered hopper barge, W.B.L. 114 — one of two delivered by Dravo to C.G. Willis, Inc., of Paulsboro, N.J. Outfitted for both push and hawser towing, the barges are equipped with corrugated rolling covers and deck winches. Designed with a special 4y2-foot coaming, the barges are operated
and crane barges, and semisubmersible drilling and workover rigs. Sea Floats are also used as chain support buoys for single point mooring buoy hawsers and hoses, mooring buoys, and marker buoys, etc. For additional information and a free brochure from Seaward International, Circle 37 on Reader
Hydraulic Capstans from Markey Machinery Co., Inc. of Seattle on a tug being built for the Panama Canal Commission. Rated for 9-inch circular Hawser, these units are duplicates of a series of capstans purchased over recent years for ship handling tugs. A major feature of the hydraulic system supplie
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WORKBOATS SOUTHERN TOWING COMPANY That’s signi? cant … were questions in the industry as to the solution. In my ? rst 12 months my con- gether.” And from that point on, we have It is signi? cant. There are still naysay- units robustness. versations with ZF were challenging to re? ned the Z-drive we
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D DESIGN: BACK TO THE DRAWING BOARD Rik van Hemmen is the President of Martin & Ottaway, a marine consulting ? rm that specializes in the resolution of technical, operational and ? nancial issues in maritime. By training he is an Aerospace and Ocean engineer and has spent the majority of his career in
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MARITIME Authors & Contributors REPORTER AND ENGINEERING NEWS M A R I N E L I N K . C O M ISSN-0025-3448 USPS-016-750 No. 11 Vol. 81 Ewing DiRenzo Bryant Bondareff Goldberg Maritime Reporter/Engineering News (ISSN # 0025-3448) is published monthly (twelve issues) by Maritime Activity Reports, Inc.