Sonardyne Retrieves Pressure Inverted Echo Sounder

Press Release
Wednesday, March 14, 2012
Sonardyne’s Inverted Echo Sounder (Photo: Sonardyne)

Sonardyne International has retrieved its first Pressure Inverted Echo Sounder (PIES) off the coast of Hawaii.

 

This new sensor logging node is designed to accurately measure the average sound velocity through a column of water from the seabed to the sea surface. The information gathered will help oceanographers to better understand the dynamics of the ocean and atmosphere-ocean coupling. On September 24, the Sonardyne PIES was free-fall deployed into a 960-meter deep water channel close to the big island of Hawaii, and commanded to log average sound velocity readings every seven minutes. Now engineers have returned to the site and recovered the unit by acoustically commanding it to float to the surface under its own buoyancy.


Pressure inverted echo sounding is a technique which works by transmitting an acoustic pulse from a PIES instrument on the seabed upwards. The pulse is reflected off the water-air boundary at the sea surface and returns back down to the seabed, where it is detected by the PIES. This enables an exact measurement of the two-way signal travel time to be calculated. At the same instant, an accurate measurement of depth is made using highly precise internal pressure sensors. Average water column velocity can then be calculated directly from the depth (i.e. distance) and travel time data. 
 

“We were keen to evaluate the performance of PIES, so our team began the analysis of its data as soon as it was recovered,” said Shaun Dunn, Engineering Business Development Manager at Sonardyne. “Initial analysis suggests that there was very little variation in the sound velocity during the 39-day recording period with a fairly stable average of around 1500m/s throughout the deployment. This figure correlates well with independent measurements made at the deployment site. The data demonstrates the ability to accurately track the average water column sound velocity over long periods, and this is thought to be of significant interest to oceanographers to enable them to better understand the physical processes which occur in the deep ocean.”

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

SENER Presents Two FORAN Papers at the Morintekh

In June, the SENER engineering and technology group participated in the 17th Morintekh – Praktik 2016 Scientific Conference, in the city of St. Petersburg, Russia.

Ship of the Year Award for NYK Vessel

Japan's first LNG-fueled ship, Sakigake, which is a tugboat owned by NYK has been recognized with a Technology Special Award at the 2015 Ship of the Year Awards

IRClass First to Certify Indian Recycling Yards per EU Standard

IRClass is amongst the first organizations in the world to certify ship recycling yards according to EU standards as an ‘Independent Verifier’. IRClass Systems and Solutions Pvt.

Technology

Wärtsilä Environmental Efficiency for Hybrid UK Ferry

A new ferry being built at the Cemre shipyard in Turkey for UK operator Wightlink will feature a comprehensive range of modern Wärtsilä equipment and systems to

SENER Presents Two FORAN Papers at the Morintekh

In June, the SENER engineering and technology group participated in the 17th Morintekh – Praktik 2016 Scientific Conference, in the city of St. Petersburg, Russia.

Boskalis Awarded Aberdeen Offshore Wind Farm Contract

Royal Boskalis Westminster N.V. (Boskalis) has been awarded the Offshore Balance of Plant contract by Vattenfall for the construction of Aberdeen Offshore Wind Farm,

New Products

Update to FORAN Lets Users Manage Series of Ships

SENER has launched an update of its FORAN shipbuilding CAD/CAM/CAE system.   Version V80R1.0, which was launched onto the market when FORAN celebrated its 50th anniversary in 2015,

CMA CGM Adds Weekly India Port Calls

CMA CGM Group announced the launch of two new weekly services, EPIC 1 and EPIC 2, between the Arab Gulf, Pakistan, North West India and North Europe. The current

SOLAS VGM: Concerns, Impacts and the Road to Compliance

Shipping industry veteran Dan Gardner is director of Mobileweight, which helps to streamline processes and create efficiencies for the container shipping industry.

Marine Electronics

KVH Promotes Bruun to COO

KVH Industries has  announced  that Brent Bruun, currently executive vice president of mobile broadband for the company, has been promoted to the newly created

Vesper Marine to Protect LIS Underwater Cables

Vesper Marine announced that it has provided its virtual Automatic Identification System (AIS) to New York Power Authority (NYPA) to protect submerged power cables in Long Island Sound.

Ocean Signal, AMI Marine Partner

Communication and safety at sea specialist Ocean Signal and manufacturer of marine electronic equipment AMI Marine have formed a new partnership to collaborate

Marine Equipment

IRClass First to Certify Indian Recycling Yards per EU Standard

IRClass is amongst the first organizations in the world to certify ship recycling yards according to EU standards as an ‘Independent Verifier’. IRClass Systems and Solutions Pvt.

Drydocks World Conforms to FPC under EU Regulation

Drydocks World, the international service provider to the shipping, offshore, oil, gas and energy sectors has successfully been certified to European Standards EN 1090 – 1 and EN 1090-2.

INTERSCHALT Expands South American Network

INTERSCHALT maritime systems GmbH, a provider of services for communications, navigation and bridge equipment and the maker of voyage data recorder systems, has

Marine Science

Ship Engine Emissions Adversely Affect Macrophages

A study conducted by Germany’s Helmholtz Zentrum München and University of Rostock found that ship emissions adversely affect the health of inhabitants of coastal regions.

ICS Conference to Focus on Shipping Agenda

The International Chamber of Shipping (ICS) will focus clearly on its core agenda this year, with experts from key areas of industry across the board speaking at

Hyundai to Build ITER Vacuum Vessel

Hyundai Heavy Industries (HHI), the world’s largest shipbuilder and a leading industrial plant EPC contractor,won $101.6 million worth of order to supply two vacuum vessel sectors (No.

Surveyors

RINA Closes Edif Group Acquisition

RINA S.p.A, the holding company of the multinational testing, inspection, certification and consulting engineering group based in Genoa, Italy, has announced that

UK Overhauls its Survey and Inspection Program

Plans to ensure there is a full maritime survey and inspection team covering the whole U.K., will see more remote working and a slight change to where some of the marine offices are based.

 
 
Maritime Careers / Shipboard Positions Maritime Security Maritime Standards Naval Architecture Navigation Pipelines Port Authority Ship Electronics Shipbuilding / Vessel Construction 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: 0.2048 sec (5 req/sec)