Dutch Invention Prevents Towline Failure on Tugboats

(Press Release)
Wednesday, May 30, 2012

The Rotterdam based shipping company Rotortug and ASD Ship Design from Alblasserdam have invented a revolutionary tugboat technology (‘tugnology’) to prevent towline failures from chafing against a tugboats fixed towing point.


Conventional towing point designs are usually fixed bitts fitted with polished and stainless steel cladding in line contact areas guiding a towline to a towing winch. Using state of the art towing winches, towlines are winched in and out automatically by using a pre‐set line force to prevent both dynamic overloads and slack wires. Synthetic towlines can easily fail due to chafing and friction with increased risks for safety.

Fast in‐ and outgoing movements of a towline with these winches cause high temperatures in especially the inner core of synthetic towlines. This is an even bigger issue at high outdoor temperatures. The fiction and the high result temperature cause much wear and, at the end, failure of a towline connection.

Rotortug and ASD Ship Design in co‐operation with the company Ridderinkhof in Hasselt have developed a rotating wheel construction to guide the towline without friction. ‘’Our azimuth friction free towing point will be of great influence to towing methods,’’ according to Mr. Ton Kooren of Rotortug. ‘’Especially when synthetic towlines are used our invention holds many advantages.’’ The patent on this invention is currently pending. Synthetic towlines are gradually replacing steel wire towlines. They are generally seven times lighter compared to equivalent steel wire towlines. In fact synthetic towlines are so light (and thus easy to handle) they float in water. A downside to synthetic towlines is their sensitivity to chafing and maximum safe working temperatures. Together with the Rotterdam based maritime service provider Kotug International and the Rotterdam pilot organization Rotortug has developed new methods to assist sea going ships.

One of these methods is the so called ‘rotoring’, a method through tugs of the Rotortug type can assist objects to be towed and moored in confined spaces. The azimuth friction free towing point enables ‘rotoring’ in heavy seas.

Rotortug bv develops, builds and sales tugs. The Rotterdam based company is known for its revolutionary tug concept Rotortug, featuring three azimuth thrusters which provide a greater maneuverability and better specific towing characteristics compared to conventional tugboat designs.

Maritime Reporter March 2015 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

People & Company News

GasLog Acquires 2 BG Group's Carriers

GasLog Ltd. completed the acquisition of two LNG carriers from Methane Services Limited (“MSL”), a subsidiary of BG Group plc (“BG”), which was previously announced on December 22, 2014.

Radio Holland bags Ahrenkiel Contract

Ahrenkiel Steamship GmbH & Co. KG and Radio Holland Germany GmbH, part of Imtech Marine, have agreed a long-term maintenance agreement for the entire Ahrenkiel Steamship fleet,

Chevron's Kirkland to Retire

Chevron Corporation confirmed today that George L. Kirkland, vice chairman and executive vice president, Upstream, will retire from the company, effective June 15.

New Products

H2O’s Owens CrapZapper Offers More

H2O’s Owens CrapZapper marine sanitation device has dual certification to the latest IMO and USCG standards for operation anywhere in the world.   Features include low maintenance,

HEADHUNTER Marine Sewage Treatment Systems

Headhunter’s team of engineers, fabricators, and wastewater specialists work together to provide innovative and efficient sewage treatment solutions.   Offering systems in three categories; STP,

SCI takes Delivery of VLCC "Desh Vibhor"

The Shipping Corporation of India Ltd. (SCI) accepted delivery of a Very Large Crude Oil Carrier (VLCC) on 28 March, 2015. The vessel has been named “Desh Vibhor”.

Marine Equipment

Radio Holland bags Ahrenkiel Contract

Ahrenkiel Steamship GmbH & Co. KG and Radio Holland Germany GmbH, part of Imtech Marine, have agreed a long-term maintenance agreement for the entire Ahrenkiel Steamship fleet,

New England Boat Show on September 17th

Newport Exhibition Group announced today that its 45th Newport International Boat Show will take place September 17th on the Newport waterfront along America’s Cup Avenue in Newport, Rhode Island.

H2O’s Owens CrapZapper Offers More

H2O’s Owens CrapZapper marine sanitation device has dual certification to the latest IMO and USCG standards for operation anywhere in the world.   Features include low maintenance,

Maritime Safety

China's Artificial Islands in South China Sea Raises U.S. Concerns

China has been building artificial islands on reefs in the many disputed areas around the South China Sea. The unprecedented land reclamation currently being conducted

Going Nuclear in Indian Ocean

As India, Pakistan and perhaps China develop their naval nuclear forces, they will enter increasingly murky waters, says a report published in the National Interest.

Costa Concordia Used For Mafia Drug Smuggling

The doomed Costa Concordia was carrying a huge shipment of Mafia-owned cocaine when it set off on its final voyage, AP reports quoting investigators who have collected evidence.

 
 
Maritime Careers / Shipboard Positions Maritime Security Naval Architecture Navigation Offshore Oil Pipelines Pod Propulsion Ship Repair Shipbuilding / Vessel Construction Sonar
rss | archive | history | articles | privacy | terms and conditions | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.2395 sec (4 req/sec)