Sonardyne helps major scientific discovery on the Mid-Atlantic Ridge

Monday, August 15, 2011
A Sonardyne Wideband Mini-Transponder was installed on the Holland 1 ROV and also on its tether management system.

 
Sonardyne International’s Ranger 2 USBL (Ultra-Short BaseLine) acoustic positioning technology has played a crucial role in a scientific mission to discover a new eco system on the floor of the Atlantic Ocean. The Irish led VENTuRE expedition used the Ranger 2 equipment to track the Remotely Operated Vehicle (ROV) Holland 1 over three kilometres below the sea surface as it searched for and filmed evidence of the newly named Moytirra Vent Field.
 
The mission to find and study the deep sea vent field on the mid Atlantic Ridge was undertaken from the Irish research vessel, RV Celtic Explorer.  The deep rated ROV Holland 1 was required to operate in the challenging conditions created by hydrothermal vents.  These vents occur where cracks in the Earth’s crust allow sea water to penetrate downwards into areas of subterranean volcanic activity.  The seawater is not only heated to boiling point, but also permeated with dissolved minerals and suspended solids from the molten rock. This heated seawater then gushes back upwards into the ocean giving rise to what looks like miniature erupting volcanoes.
 
 “On the first dive, we found the edge of the vent field within two hours of arriving on the seafloor,” said Dr Andy Wheeler, who led the expedition. “The ROV descended a seemingly bottomless underwater cliff into the abyss. We never reached the bottom, but rising up from below were these chimneys of metal sulphides belching black plumes of mineral-rich superheated water. Often the search for vents takes much longer, and our success is a testament to the excellent equipment on board and the hard work and skill of everyone involved.”   
 
Because of the extreme depth and the importance of monitoring the precise location of the ROV as it navigated the difficult conditions, the research team selected Sonardyne’s Ranger 2 acoustic positioning technology.  This system is specifically designed for deep water, long range tracking of underwater vehicles and is widely used throughout the offshore oil, ocean science and marine survey industries.
 
Sonardyne’s engineers fitted Holland 1 with a high power acoustic transponder that communicates with a transceiver mounted onboard the RV Celtic Explorer.  From this, the system is able to calculate the range and bearing of the underwater target with great precision.  Ranger 2 incorporates the latest Wideband 2 signal technology which allows the vehicle’s real time position to be accurately monitored despite the noise pollution generated by the hydrothermal vent plumes.
 
Dr Bramley Murton of the National Oceanography Centre in the UK, who first saw clues for possible vents on an expedition aboard the UK research vessel RRS James Cook in 2008 said:  “The sense of awe at what we are seeing does not fade, and now we are working hard to understand what our discovery tells us about how our planet works.”

 

Maritime Today


The Maritime Industry's original and most viewed E-News Service

Maritime Reporter July 2016 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

People & Company News

Cenac Marine to Christen New Vessel, Donate Barge

A ceremony will be held July 29 at Cenac Marine Services headquarters in, Houma, La. To commemorate the christening of its newest vessel, M/V Quincey Cenac, as

Concordia Maritime Posts Q2 Profit

Facing a “gradually deteriorating market,” Sweden based tanker shipping company Concordia Maritime said it was able to post a profit in Q2 2016 based on high vessel

Brown Named Bureau Veritas Communications Director

Nick Brown has been appointed Bureau Veritas’ new Communications Director, Marine & Offshore Division, the classification society announced.    Brown will take up the post from November 2,

Technology

Insights: Kunkel Weighs in on Propulsion Technology

LNG? Methanol as fuel? Hybrid systems? Tier 4? Reducing noise? Cutting emissions without crushing fuel economy? Marine News readers have questions and Bob Kunkel has answers.

A Sea Change in Waterjet Technology

Longtime waterjet propulsion equipment provider NAMJet introduces key advancements for the workboat sector. Back in 2011, when boat builder Birdon went looking

ATB Design Comes of Age

The emerging trend of marrying the design of an articulated tug and barge (ATB) to a particular propulsion system to maximize efficiencies of that system has, of late,

Education/Training

Maersk Training Bullsh on India

Maersk Training, part of the Denmark based A.P. Moller-Maersk, is betting on the Indian training centre, reports the Hindu. India is one of the 10 Centre’s that is making profits.

Safety and Preparation on the Brownwater Radar

Weather Channel Forecasters are predicting a “near-average” hurricane season for 2016, but warn that an average season does not mean businesses and residents shouldn’t prepare for the worst.

KVH's Zika Virus Safety Video for Mariners

KVH Industries, Inc., (Nasdaq: KVHI), announced today that it is offering Videotel’s new safety and training video about the Zika virus free to all mariners worldwide.

Marine Equipment

Damen PSV for Wilson Sons Ultratug Offshore

Wilson Sons Ultratug Offshore, a joint venture between Wilson Sons and the Chilean maritime services provider Ultramar, has taken delivery of a Damen PSV 5000.

VARD Bags Three-vessel Contract

Vard Holdings Limited (“VARD”), one of the major global designers and shipbuilders of offshore and specialized vessels secured a contract for the design and construction

Insights: Kunkel Weighs in on Propulsion Technology

LNG? Methanol as fuel? Hybrid systems? Tier 4? Reducing noise? Cutting emissions without crushing fuel economy? Marine News readers have questions and Bob Kunkel has answers.

Marine Science

Fuel Consumption, Emissions Monitoring Software Updated

As part of the ongoing Blue Star Delos Renewable Energy Innovation Project, Eco Marine Power (EMP) stated that the Aquarius Management & Automation System (MAS)

Canada Embarks on Arctic Survey Mission

Canada has launched its 2016 Arctic expedition to collect important scientific information to support the nation’s submission on the extended continental shelf in the Arctic Ocean.

Pathogenic bacteria hitchhiking to North and Baltic Seas?

For the first time, AWI scientists have found evidence of living, potentially pathogenic vibrions on microplastic particles. With increasing water temperatures

 
 
Maritime Careers / Shipboard Positions Maritime Contracts Maritime Security Offshore Oil Pipelines Pod Propulsion Ship Electronics Ship Repair Sonar Winch
rss | archive | history | articles | privacy | 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: 0.1417 sec (7 req/sec)