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Using Passing Vessel Analysis to reduce operational risksUsing Passing Vessel Analysis to reduce operational risks
Added: 07 Dec 2017
Passing Vessel Analysis is fast becoming an essential requirement in the planning of marine facilities, say navigation simulation and ship mooring experts [and UKHMA Commercial Members], HR Wallingford, who have been working in Texas to develop inland waterway facilities that protect moored vessels from passing ships.

In the United States, the amount of waterborne transport completed by inland waterways is significant. In Texas alone, transport by inland waterway accounts for around 600 million tonnes each year, close to 30% of waterborne trade in the entire U.S.A. by tonnage.

As waterways continue to develop, many of the prime locations have already been occupied leading developers to look at increasingly more complex sites to locate new marine facilities.
These sites may be on the bend in a channel, or where it is not possible to design traditional ship docks orientated parallel to the main shipping channel, and can be considerably more complex from a marine design perspective.

As the average size of the vessels using these waterways has increased notably in recent years, so too has the frequency of mooring line failures resulting from vessels passing too close and / or too fast past ships moored at existing facilities.

In recognition of this, local pilotage organisations now require a passing vessel analysis as part of the permit conditions attached to the development of a new facility.

Passing vessel analysis is a fully dynamic ship mooring analysis which systematically considers a range of different conditions, such as vessel draught, speed and separation distance to build a risk profile of potential passing vessel effects at the new facility.

It ultimately serves two purposes: to validate the engineering design in terms of berth geometry and capacity of mooring hardware to be installed; and to provide local pilots with guidance on acceptable speeds and passing distances with which they may pass ships moored at the new facility.

“We have gathered data from hundreds of physical model tests to investigate ship mooring response” says Dr Mark McBride, HR Wallingford’s Ships Group Manager, “and this data, along with full scale measurement campaigns carried out by industry, has been used to continually develop and validate our numerical modelling tools against increasingly complex scenarios. For our clients, this translates into the development of optimised marine facilities and a more informed picture of the operational risks associated with passing vessels on the adjacent waterway.”

As ships continue to grow in size, so too comes the need to expand the waterways and provide additional channel capacity. There are already several such projects proposed in Texas and many more across the United States.

The introduction of larger vessels in deeper draught channels typically increases the risk of mooring line failure due to passing vessel interaction. Consequently, it is not only important to assess the situation for new terminals, but also to reassess the risks associated with existing terminals.

Of particular relevance in the U.S.A. is the potential interim condition resulting from the sequence in which the U.S. Army Corps of Engineers deepen the Federal Navigation Channel and the private industry operator chooses to deepen the access to its own ship docks, if at all. These changes have the potential to significantly impact the operational risk profile associated with mooring operations at existing facilities, and vessel passing is an issue that some operators are setting out to understand in more detail.

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EMSA December newsletter publishedEMSA December newsletter published
Added: 07 Dec 2017
In this issue of the European Marine Safety Agency newsletter:

Nordseth and Carlone to head EMSA Administrative Board;

Enhancing fire safety on ro-ro decks;

Looking at human behaviour in marine accident investigation;

Safe loading and unloading of bulk carriers;

European cooperation on coast guard functions;

Celebrating 10 years of CleanSeaNet;

Diplomatic community holds 33rd annual charity sale.
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Improving regulation in the Tees EstuaryImproving regulation in the Tees Estuary
Added: 16 Nov 2017
Posted by: Amy Wardlaw, MMO
16 November 2017


The way that regulators work with businesses operating in the Tees Estuary is changing thanks to a new agreement.

The Marine Management Organisation has signed up to a memorandum of understanding (MoU) which sets out new ways it will work with the Environment Agency and Natural England to provide an efficient, consistent service that supports sustainable growth.

The agreement will make it easier for developers and businesses to navigate the regulatory framework in a number of ways:

•Providing a single point of entry – pointing applicants to other bodies as relevant and in some cases proactively informing other MoU signatories or consenting bodies that an application or an advice request has been received.
•One lead authority – aiming to reduce the duplication of evidence requirements and to streamline regulatory processes around Environmental Impact Assessments and Habitats Regulations Assessments.
•Dispensing with, or deferring regulatory responsibilities – exploring the legal options available for streamlining within the regulatory process.
•Certainty on evidence requirements – identifying common evidence needs, enabling parallel tracking of work to satisfy evidence requirements, and assessing the level of support that could be provided to proactively fill strategic gaps in evidence.
•Co-ordination of advice – providing coordinated advice between organisations within agreed timescales.

The MoU will also help to protect and enhance the Teesmouth and Cleveland Coast nature conservation sites.

For further details follow the link below.

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NEWS
7/12 Using Passing Vessel Analysis to reduce operational risks
7/12 EMSA December newsletter published
16/11 Improving regulation in the Tees Estuary
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Report 23/2017: Grounding of the ultra-large container vessel CMA CGM Vasco de Gama
Report 4/2017: Petunia Seaways / motor launch Peggotty
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