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

Fugro Launches Seastar XP2

Fugro Satellite Positioning released its Seastar XP2 PPP GNSS augmentation service on July 1, 2014, which provides increased redundancy for mission-critical offshore

Harnessing the Wind for Auxiliary Propulsion

Finnish marine engineering company Norsepower Oy Ltd. announced that it will bring to the commercial maritime market an auxiliary wind propulsion solution aimed

Engine Performs in Roll Over Test

Engines customized for new Dutch search-and-rescue lifeboat vessels keep running after full rotation on axis. In thrashing, unforgiving seas, a capsized rescue vessel used to be a symbol of defeat.

Offshore

Ocean Mineral Singapore Set for Seabed Exploration

Ocean Mineral Singapore Pte. Ltd. (OMS) has received approval from the International Seabed Authority (ISA) on its application for its first seabed exploration licence.

DNV GL Publishes Regulatory Roadmap for Floaters in the US

DNV GL announced it has mapped out what is necessary to be in compliance with U.S. Coast Guard (USCG) requirements to operate FOIs, FSOs and FPSOs in U.S. waters.

Second Typhoon Threatens Taiwan

The Taiwan military was collecting and distributing sandbags to guard against possible flooding on Tuesday as a typhoon bore down on the island after brushing the Philippines.

Classification Societies

DNV GL Publishes Regulatory Roadmap for Floaters in the US

DNV GL announced it has mapped out what is necessary to be in compliance with U.S. Coast Guard (USCG) requirements to operate FOIs, FSOs and FPSOs in U.S. waters.

Singapore Approves Danelec New-Generation VDR

The Maritime and Port Authority of Singapore has issued a certificate of approval for the Danelec DM100 VDR for installation on ships under the Singapore registry.

Bureau Veritas Kick-starts LNG Bunkering

International classification society Bureau Veritas has published a comprehensive set of guidelines on LNG Bunkering, with the aim of speeding adoption of LNG as

 
 
Maritime Careers / Shipboard Positions Maritime Contracts Naval Architecture Navigation Port Authority Salvage Ship Electronics Ship Repair 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: 0.3887 sec (3 req/sec)