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

People & Company News

IBIA Celebrates 23th Annual Dinner

Association appoints new board members and sets priorities for the future   The International Bunker Industry Association (IBIA) has appointed three new members

OSV Delivered to MC2 in Dubai

Marine Core & Charter LLC (MC2) headquartered in Dubai has taken delivery of the new build PETRA-1, the first of two, 45-meter Fast Offshore Support Vessels in

Baltic Index Pauses at Record Low

The Baltic Exchange's main sea freight index, tracking rates for ships carrying dry bulk commodities, ended flat on Thursday after declining for 12 straight sessions

Technology

Innovative Equipment Will Help Unload Listing Ship

Following Smit Salvage’s salvage of the stricken ship Modern Express in the Gulf of Biscay, another Rotterdam company has now become involved in the rescue operations.

Sea IT, Veritas Tankers Ink Long-term Software Deal

Sea IT has entered a long term ICT agreement with Veritas Tankers. The agreement comprises installation of BlueCORE Generation 4, an ICT platform specifically developed for the marine industry,

Update on Seagull Mobile apps for Crew

The Seagull mobile app for crew training status is set to revolutionise the way seafarers track their training records and receive critical safety alerts, by making

New Products

First ‘Reachstacker’ Starts Duty in the Port of Ravenna

Liebherr Maritime Cranes delivered a LRS 545, the first model out of the new reachstacker series, to the Italian Port of Ravenna.   The Port of Ravenna is one

Cummins Expands Marine Tier 3 Product Line

Cummins Inc., a manufacturer of diesel engines and generator sets for the marine industry, has launched a new Onan marine U.S. Environmental Protection Agency (EPA) Tier 3-certified generator,

Honda Marine on Display at Miami Boat Show

Honda Marine is set to market its complete range of outboard marine four-stroke engines at the 2016 Miami International Boat Show, February 11-15, 2016.   At this year’s show,

Marine Electronics

Update on Seagull Mobile apps for Crew

The Seagull mobile app for crew training status is set to revolutionise the way seafarers track their training records and receive critical safety alerts, by making

Danelec Marine Making Free ECDIS Upgrades

Ships with older Danelec ECDIS models are being upgraded to new hardware and software   Danelec Marine has launched a program to provide free upgrades of shipboard

Transas Academy Launched

Transas Academy launched during the Simulation User Conference 2016   Transas has launched its newly established Transas Academy, part of the company's THESIS,

Marine Equipment

Yacht Club Takes Delivery of New Dredger

Rose City Yacht Club, a long-standing private marina and social club along the Columbia River in Portland, Ore., recently took delivery and startup of a new 8-inch Badger Class dredge from Reserve,

First ‘Reachstacker’ Starts Duty in the Port of Ravenna

Liebherr Maritime Cranes delivered a LRS 545, the first model out of the new reachstacker series, to the Italian Port of Ravenna.   The Port of Ravenna is one

Innovative Equipment Will Help Unload Listing Ship

Following Smit Salvage’s salvage of the stricken ship Modern Express in the Gulf of Biscay, another Rotterdam company has now become involved in the rescue operations.

Marine Science

OSD Designs Research Vessel for TORI

Offshore Ship Designers (OSD-IMT) has signed a new contract to design an IMT2001 Scientific Research Vessel for the Taiwanese Ocean Research Institute (TORI).    The

Update on Seagull Mobile apps for Crew

The Seagull mobile app for crew training status is set to revolutionise the way seafarers track their training records and receive critical safety alerts, by making

Royal Caribbean Ship Thrashed by Storm Returns on Wednesday

A Royal Caribbean cruise ship forced to turn back early after being battered by an Atlantic storm was expected to return to its New Jersey port at 9 p.m. on Wednesday (0200 GMT Thursday),

Surveyors

BMT Provides Ferry Design for River Murray

BMT Design & Technology Pty Ltd (BMT), a subsidiary of BMT Group Ltd, has completed a design project for the South Australian Government’s Department of Planning, Transport and Infrastructure (DPTI).

DNV GL, RS Ink Cooperation Deal

DNV GL’s Maritime CEO Knut Ørbeck-Nilssen recently met with Konstantin Palnikov, Director General of the Russian Maritime Register of Shipping (RS), at the RS head office in St.

Drones Allow Surveys Without Scaffolds

DNV GL has completed several tests using drones to support hull surveys of vessels. Using drones to visually check the condition of remote structural components

 
 
Maritime Contracts Maritime Security Naval Architecture Offshore Oil Port Authority Salvage Ship Electronics Ship Repair Ship Simulators Shipbuilding / Vessel Construction
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: 0.2030 sec (5 req/sec)