Transas St. Lawrence Seaway Draft System Approved

press release
Monday, July 23, 2012
The TRANSAS Draft Information System (screen shot).

Transas Marine receives approval for Saint Lawrence Seaway Draft Information System.

 

The St. Lawrence Seaway is one of the most important transportation links in North America. To maximize the efficient use of the seaway, in 2001, the Seaway authorities started to a study which would determine the maximum load ships can carry while maintaining a safe Under-Keel Clearance (UKC).

 

Over the years the maximum draft of vessels transiting the Seaway in the MLO Montreal to Lake Ontario and the Welland Canal has been gradually increased. At the opening of the Seaway in 1959, the maximum draft for ships was set at 6.85 meters (22 feet 6 inches ).  This maximum draft is now set at (26 feet 6 inches). However, changes in water levels and a phenomenon called ship sinkage or "squat" made adjusting the maximum draft again more complicated.

 

Draft is measured prior to departure but a moving ship actually sits much lower in the water, particularly in shallow or constrained channels. How much a ship "squats" depends on factors such as the size and speed of the ship, shape of the channel, depth of the water, currents, wind, and even the presence of other ships.

 

Undertaken at the request of the St. Lawrence Seaway Management Corporation and industry partners that included the Canadian Ship owners Association and the Shipping Federation of Canada, the mentioned study resulted in standard squat models for the various types of vessels transiting the Seaway.

 

Over the past year and a half, the St. Lawrence Seaway authorities have developed a functionality description of a Draft Information System that incorporates the Seaway squat models, which was finally approved by all stake holders in March of this year and was then issued to the public.

 

In accordance with this specification, TRANSAS has developed a Draft Information System ( DIS ) based on the NS4000 ECDIS which allows the accurate display of the vessel’s position, real time water levels and data from highly detailed bathymetric charts.

 

An independent functionality verification and assessment was performed by Lloyds Register in June of this year after which the system was installed on board the M/V ALGOMA SPIRIT for final approval by the St. Lawrence Seaway authorities.

 
The TRANSAS Draft Information System successfully passed the performance tests without comments or open items. The DIS can run as a stand-alone system or in a network with the Transas NS4000 ECDIS providing a unique combination of precise navigation instruments, high definition chart data and real-time navigation information in both the DIS and the ECDIS. The Transas DIS is built on the same hardware platform as the Transas NS4000 ECDIS MFD providing for better redundancy and lower cost of maintenance.
 

The Draught Information System (DIS) is a program designed to calculate and display the under-keel clearance (UKC) on the basis of the following data:
 

• High Resolution Bathymetry data provided by the Canadian Hydrographic Service (CHS);
• Water levels; received automatically via Seaway AIS stations of a network of water level gauge stations or set manually by the user;
• Ship forward and after draft set manually by the user;
• Ship Squat based on Seaway Squat Models for the vessel and channel type. 
 

In dangerous navigational situations or under system fault conditions, relevant notifications will be provided for the operator. When the DIS is connected to the Transas NS4000 ECDIS network, any ECDIS can be set up as the DIS for back-up purposes in the same way as the DIS can be used as the ECDIS back-up. The Draught Information System button in the “UKC Data” display is intended for switching between the DIS mode and standard ECDIS mode. When the DIS mode is turned off, the MFD can operate as an additional work station.
 

The DIS will indicate whether certain areas are safe to pass or require speed adjustments to decrease the squat of the vessel. A required safety margin of 30 cm of UKC has to be maintained. The HD chart contours are then filled in with colors indicating safe passage areas.
 

The availability of this data on the bridge of the vessel will enable most vessels to maximize their draft up to 26 feet 9 inches from  the current Seaway permissible draft of 26 feet 06 inches.  This increase of 3 inches would mean that the average Great Lakes vessel can carry an additional 250 to 400 tons of cargo. The investment in this equipment will result in greater operational and environmental efficiencies based on a tonne / mile matrix.
Paul Welling,  Regional Sales Director, North America for Transas USA : “ The DIS development will not only benefit our customers but is also a huge benefit to safe navigation in the St. Lawrence Seaway. We are proving again that Transas Sets the Standard “.
 

 

Tom Anderson,  Director, Ports & Harbours, Navigation , Algoma Central Corporation : “The use of the Transas DIS will allow for the safe and effective deep loading of our vessels to optimize the full available water column in the Seaway.  The use by our vessel personnel of the Transas DIS integrated with shipboard ECDIS/ECS and the supporting Seaway AIS network is an example of an e-Navigation initiative that was developed for a specific area user that has further potential for use in other ports and their connecting waterways.”

 

Maritime Reporter July 2014 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Technology

Jinhai Heavy Industry Secures Another Invention Patent

Jinhai Heavy Industry of China has received patent rights for its large ship superstructure hoisting method after a state intellectual property review. The patent rights is for twenty years.

BMT ARGOSS Awarded OHSAS 18001

BMT ARGOSS, an operating company of BMT Group Ltd. has been awarded the universally recognized standard for occupational health and safety, BS OHSAS 18001. BMT ARGOSS,

There’s Still Time for SHIPPINGInsight Award Entries

Entry submissions for the first SHIPPINGInsight Award are due Friday, Aug. 1, but organizers said they will continue to accept nominations through following week to provide some extra time.

Navigation

Bulk Carrier Detained; Two Crew Convicted

A Hong Kong flagged vessel was detained in Queensland following a Port State Control (PSC) inspection conducted by the Australian Maritime Safety Authority (AMSA)

Coast Guard Preps for Arctic Research

A team of scientists from the U.S. Coast Guard (USCG) Research and Development Center (RDC) will depart from Seward, Alaska, for a technology evaluation in the

Raytheon Anschütz Innovations to Debut at SMM

German navigation system manufacturer Raytheon Anschütz announced the launch of navigation system innovations as well as improvements to existing technologies for this year’s SMM.

Maritime Safety

HII in $49.6 mi Deal for Work on USS George Washington (CVN 73)

Huntington Ingalls Industries (NYSE:HII) announced today that its Newport News Shipbuilding division has received a $49.6 million contract to begin planning

Bulk Carrier Detained; Two Crew Convicted

A Hong Kong flagged vessel was detained in Queensland following a Port State Control (PSC) inspection conducted by the Australian Maritime Safety Authority (AMSA)

Coast Guard Preps for Arctic Research

A team of scientists from the U.S. Coast Guard (USCG) Research and Development Center (RDC) will depart from Seward, Alaska, for a technology evaluation in the

Software Solutions

New AVEVA ISM Bridges the Gap

AVEVA launches a new application for governing asset information using a standards-based methodology. AVEVA announced the launch of AVEVA Information Standards Manager (AVEVA ISM),

ISS's Innovative Series of New Travel Apps for Cruise Industry

Inchcape Shipping Services (ISS) the world’s leading maritime services provider, has launched an innovative series of travel apps for the cruise industry in Greece,

HydroComp to Hold Propeller 'Mini-Workshop'

A special version of HydroComp's intensive Propeller Workshops will be brought to Tampa before the start of IBEX 2014.   The Mini-Workshop is a special version

Logistics

Bill Promotes US LNG Vessel Transport

Congressman John Garamendi (D-CA-03), Ranking Member of the House Transportation and Infrastructure’s Coast Guard and Maritime Transportation Subcommittee, introduced H.

SEACOR Holdings Announces Q2 Results

SEACOR Holdings Inc. has announced its results for its second quarter ended June 30, 2014. For the quarter ended June 30, 2014, net income attributable to SEACOR Holdings Inc.

Asia-N.Europe Container Freight Rates Jump 21%

Shipping freight rates for transporting containers from ports in Asia to Northern Europe jumped 21 percent to $1,455 per 20-foot container (TEU) in the week ended on Friday,

Great Lakes

Great Lakes Shipyard Wins EPA Drydock Contract

Great Lakes Shipyard has been awarded a contract for the United States Environmental Protection Agency (EPA) vessel R/V Lake Explorer II. The scope of work will include drydocking,

Lake St. Clair Grounded Bulk Carrier: Update

The U.S. Coast Guard said it continues to monitor the response and salvage operations to the 656-foot HK-flagged bulk carrier Federal Rideau, hard aground in the downbound shipping channel of Lake St.

Coast Guard Responds to Grounded Freighter in Lake St. Clair

The Coast Guard has responded Sunday to a 656-foot freighter that was hard aground in the downbound shipping channel of Lake St. Clair. Initial reports indicate

 
 
Maritime Security Maritime Standards Naval Architecture Pod Propulsion Port Authority Salvage Ship Electronics Ship Simulators 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: 0.1642 sec (6 req/sec)