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

People & Company News

NAVCENT Commander Recognizes Journey of Hope Sailors

Commander, U.S. Naval Forces Central Command, U.S. 5th Fleet, Combined Maritime Forces, Vice Adm. John. W. Miller, recognized the accomplishments of three special-needs sailors from the Kuwaiti ship,

NYK Holds 8th Environmental Management Conference

NYK welcomed about 60 environmental supervisors from 47 NYK Group companies to the group’s annual Environmental Management Conference in Tokyo. NYK holds this

W&O, LESER Partner to Deliver Safety Relief Valves

W&O, a global supplier to the marine and upstream oil and gas markets for pipe, valves and fittings, valve automation and engineered solutions, has partnered with

Technology

World’s First LNG-Ready Ultra Large Container Ship Named

The race is on in global maritime circles to be the “world’s first” in every aspect of environmental friendliness, particularly in regards to the incorporation of LNG as fuel onboard commercial ships.

Wärtsilä Integrated Solutions for Maersk's AHTS Vessels

A new series of six Anchor Handling Tug Supply vessels to be built at the Kleven Verft AS in Norway for the Danish based Maersk Supply Service A/S - part of the A.

ClassNK Approves Niigata Dual-fuel Engine Design

Classification society ClassNK has granted approval to the design of the new 28AHX-DF dual-fuel engine developed by Niigata Power Systems Co., Ltd. The new engine

Education/Training

Kings Point Student Earns NMRA Scholarship

The National Marine Representatives Association (NMRA) recently awarded its second $500 scholarship to a student pursuing education in the marine industry and maritime trades.

New Training for Man Overboard Response

Falling overboard is a life-threatening emergency, not only for the person in question but also for those involved in their rescue. Every step in the rescue process

Gazprom Transgaz Ufa Organizes Arts Festival

Over 200 healthy children and children with disabilities from Bashkortostan as well as the Volga Region participated in the Breaking the Barriers second interregional children’s arts festival,

Marine Equipment

Wärtsilä Integrated Solutions for Maersk's AHTS Vessels

A new series of six Anchor Handling Tug Supply vessels to be built at the Kleven Verft AS in Norway for the Danish based Maersk Supply Service A/S - part of the A.

Third Strike, Mansour Is Out

The M/V "MANSOUR M" with IMO number 7600586 has been banned for the 3rd time after subsequent detentions after the second refusal of access order in the Paris MoU region.

MHI Completes Development of "Sayaringo STaGE"

Mitsubishi Heavy Industries, Ltd. (MHI) has completed development of the "Sayaringo STaGE," a next-generation LNG (liquefied natural gas) carrier. The Sayaringo

Marine Science

Wärtsilä Integrated Solutions for Maersk's AHTS Vessels

A new series of six Anchor Handling Tug Supply vessels to be built at the Kleven Verft AS in Norway for the Danish based Maersk Supply Service A/S - part of the A.

Woodside to Pick up Moroccan Acreage

Woodside advises that it has entered into a contract for an exclusive Reconnaissance Licence (RL) with the Office National des Hydrocarbures et des Mines, the

Strategy Can Maximize UKCS potential

Companies operating in the North Sea require a cultural shift to make the most of the its potential, according to a new report from Deloitte, the business advisory firm.

 
 
Maritime Careers / Shipboard Positions Maritime Contracts Maritime Standards Navigation 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: 0.5056 sec (2 req/sec)