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

People & Company News

Holland America Line Heads NOAA's List of Weather Observations

Holland America Line topped the list in 2014 for the World’s Leading Weather Observing Cruise Ship Companies who submitted weather information to the National

Cook Islands to Issue Wreck Removal Certificates

The Cook Islands has acceded to the Nairobi International Convention on the Removal of Wrecks, 2007 (“The Nairobi Convention”). As a State Party, Cook Islands

Richmond Ferry Service to Become a Reality

At its meeting of March 5, the Board of Directors of the Water Emergency Transportation Authority (WETA) approved a Cooperative Agreement with the Contra Costa

New Products

New Tool for Recovering Oil from Sunken Wrecks

A tool for removing oil trapped in submerged vessels has been developed in Norway by design specialists Miko Marine.   The launch of the Moskito aims to address

Tennessee Chill Box Expands Industry Reach

Air conditioned respirator supply systems supplier Tennessee Chill Box, LLC (TCB) launched a new air-supply, mask and hood system designed to expand the industry-reach

Caterpillar to Deliver Highest Horsepower Tier 4 Solution

Edison Chouest Offshore has selected Caterpillar Marine's Cat Tier 4 Final C280-16 generator sets for two new vessels, Caterpillar announced today. The generators

Marine Equipment

Rushton Gregory Inks Gemeco Marketing Deal

Rushton Gregory Communications announced today the latest addition to its industry-leading client roster, Gemeco Marine. Based in Lake City, South Carolina,

Caterpillar, Uptake to Create Analytic Solutions

To help customers around the world better understand the health of their equipment and optimize machine availability, Caterpillar Inc.today announced it has

Scandlines Concludes Sale of Freight Routes

First State Investments is taking over the ferry route Helsingør-Helsingborg including the five vessels operating the line. The contract with First State Investments

Maritime Safety

Rushton Gregory Inks Gemeco Marketing Deal

Rushton Gregory Communications announced today the latest addition to its industry-leading client roster, Gemeco Marine. Based in Lake City, South Carolina,

India's Naval Help to Small Indian Ocean Nations

Indian Prime Minister Narendra Modi assigned senior officials in the Ministry of Defence with a task to “identify” and “support” maritime needs of smaller nations

Houston Ship Channel Reopens After Ships Collide

The Houston Ship Channel has reopened after a collision between a container ship and a chemical tanker, according to a spokesman with the United States Coast Guard.

 
 
Maritime Contracts Maritime Standards Naval Architecture Navigation Offshore Oil Salvage Ship Electronics Ship Simulators Shipbuilding / Vessel Construction Winch
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: 0.2159 sec (5 req/sec)