DNV Introduce Seismic Vessel Notation

Press Release
Wednesday, October 03, 2012

DNV has developed a class notation for seismic vessels in consultation with key industry players, WesternGeco, PGS and Fugro-Geoteam.

The need to have enhanced redundancy and proper deck arrangements to ensure continuous operation without loss of speed is the backbone of these new technical requirements.

Seismic vessels contain high end computerized technology to find resources below the seabed, and represent a key element in the value chain leading to future offshore field developments. Any interruptions in the ships forward movement can complicate the seismic data processing, and continuous operations with focus to avoid any downtime of key functions are hence of utmost importance.

With expensive seismic streamer equipment mobilized at sea, sudden loss of service speed may lead to severe consequences as damage to cables impairing the whole seismic vessel operation.

The new notation focuses on increased availability of the vessels during critical phases of the seismic operations. As well as vessel operators, DNV has consulted seismic handling and high pressure equipment suppliers to ensure that all current and future industry challenges are comprehensively dealt with.

The maintenance of propulsive power is a key issue. The class notation has therefore taken the DNV concept for redundant propulsion one step further so that any failure on board will not lead to loss of more than 50 per cent forward trust. This is sufficient to maintain a minimum speed of a few knots and will protect any high cost air guns and streamers deployed.

Seismic vessels typically operate for many months continuously without seeking harbour. The class notation requires a deck arrangement that facilitates side by side transfer for crew and resupply from a seismic support vessel.

Beyond this, the class notation also sets a requirement for the bridge arrangement to ensure good view to the streamers and any workboats that are close by during normal operation. High pressure systems are also addressed in the class notation to ensure that deck operations can be carried out safely by the crew.


 

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

Technology

FLNG Prelude: A New Dawn in the Age of Maritime & Energy

Longer than four football fields, as big as six Nimitz-class aircraft carriers and almost as tall as the Taipei 101 skyscraper, Royal Dutch Shell PLC is hoping that its record-setting,

Desulfurization of Exhaust Gases in Shipping

Are shipowners prepared to enter SECA zones?   Due to existing regulations on air exhaust emissions from the International Maritime Organization (IMO), and with

Intelligent grabbing technology SmartGrip by Liebherr

For the mobile harbour crane range Liebherr has developed an intelligent system which optimises grab filling rates in a self-learning manner. In a comprehensive study,

Offshore

FLNG Prelude: A New Dawn in the Age of Maritime & Energy

Longer than four football fields, as big as six Nimitz-class aircraft carriers and almost as tall as the Taipei 101 skyscraper, Royal Dutch Shell PLC is hoping that its record-setting,

Corvus Energy, GMC Close Financing Agreement

Corvus Energy today announced that it has completed a strategic investment by Green Marine Capital (GMC) previously announced on May 5, 2014. Green Marine Capital,

Valemon Topsides Installed

On Monday, July 28, the topsides were lifted into place on the steel jacket on the Valemon field in the North Sea. Produced by Samsung Heavy Industries this is

Classification Societies

ABS to Class the World's First CNG Ship

ABS announced it has been chosen to class the world's first compressed natural gas (CNG) carrier ordered by Pelayaran Bahtera Adhiguna, a subsidiary of Indonesia's

Interview: Roberto Cazzulo Talks Class Trends

As Roberto P. Cazzulo, RINA, steps down as the Chairman of the IACS Council, Maritime Reporter caught up with him to discuss the current state and future direction of global class.

RS Class New Ships for the Caspian Sea

Russian Maritime Register of Shipping (RS) has signed a contract with Baku Shipyard LLC for the construction of three 38М high speed crewboats (designer - SHIPTECH,

Seismic Vessel Tech

Rosneft Starts Up Field Work in the Kara Sea

On July 24 this year, research vessel Geolog Dmitry Nalivkin sailed from Kirkenes (Norway) to the Kara Sea. In the next three months 2D seismic survey, will

US Approves Plan to Open Atlantic to Oil Reserve Surveys

The Obama administration on Friday approved a plan that would allow companies to assess oil resources off the Atlantic Coast, angering environmental groups that

 
 
Maritime Standards Naval Architecture Navigation Offshore Oil Pipelines Pod Propulsion Salvage Shipbuilding / Vessel Construction Sonar 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: 0.1398 sec (7 req/sec)