OSIL Multi-corers in CSA Ocean Sciences' Gulf of Mexico Study

CSA Ocean Sciences has purchased two Mega Multiple Corers from UK-based Ocean Scientific International Ltd (OSIL) for use in a month-long deep-water sampling effort to assess sediment chemistry and infaunal communities in the Gulf of Mexico. The OSIL Multiple Corer enjoys a privileged position as the primary corer for environmental impact assessment worldwide, owing to its ability to collect up to 12 simultaneous high-quality undisturbed sediment samples including the sediment/water interface and overlying supernatant water. The 600mm long core tube collects approximately 450mm of sediment (0.35l) and 150mm of water (0.12l). The OSIL Multi Corer design has recently been updated... (read more)
2014-09-05 12:00:00

Under-ice Lake Survey

A British engineering team is heading off to Antarctica for the first stage of a scientific mission to collect water and sediment samples from a lake buried beneath three kilometres of solid ice. Transporting nearly 70 tonnes of equipment, the ‘advance party’ will journey almost 16,000km from the UK to subglacial Lake Ellsworth on the West Antarctic Ice Sheet (WAIS). It is one of the most remote and hostile environments on Earth, with temperatures of –25°C.   Their task is to prepare the way for the ‘deep-field' research mission that will take place one year later. In October 2012, a... (read more)
2011-10-13 12:00:00

RTsys Uses Acoustical Detection to Characterise Nature of Surface Sediments

How can you study sea-floor sediments simply, quickly and without taking samples? RTsys answers this question with acoustics. The French company, a specialist in underwater electronics and acoustics, has perfected INSEA (INvestigation of SEdiments by Acoustics), a sound velocity meter intended for studying sediments. INSEA is a portable sound velocity meter that can easily take measurements in situ in all types of sed-iments. It offers an alternative to sampling (coring, grab bucket, rake, etc.) that can be destructive, with a speed advantage as the analysis is performed in place and not in a laboratory. The first version of INSEA, created... (read more)
2018-04-13 10:31:42

Sonar Studies Reveal New Mediterranean Seabed Features

Unusual seabed features have been revealed in the Mediterranean just beyond the Rhône mouth by a team from the Southampton Oceanography Centre (SOC). Working with a range of sonar equipment from Marine Electronics Ltd of Guernsey, the EU funded team obtained clear images of what they believe to be gas escape features on the delta front. The equipment also revealed deep channels cut into the delta, suggesting the activity of hyperpycnal flows - high density sediment currents capable of scouring the seabed. The survey was part of the Eurostrataform project which is being coordinated by SOC and has been created... (read more)
2004-07-15 12:00:00

3 Axis Accelerometer to Assist Piston Coring

Deep sea sediment corer manufacturers Ocean Scientific Ltd (OSIL, UK) have released an accessory for their Giant Piston Corer: an accelerometer, which will aid operators with deployments. The accelerometer can calculate the attitude of the corer head on penetration of the corer into the seabed, and the penetration rate of the barrel string, which will assist operators with multiple deployments in the same location by ensuring optimal deployment conditions and sample recovery. The accelerometer is housed in a hard anodised aluminium canister that is rated to full ocean depth. The Giant Piston Corer from OSIL (Ocean Scientific International Ltd.) is... (read more)
2017-08-10 09:17:11

T-Type Acoustic Inspection System

The T-Type Acoustic Inspection System measures the volume and topology of sludge sediments in the bottom of liquid storage tanks (e.g. crude oil). The system includes an ATEX-certified tool that is inserted into the tank through a suitable access hole in the roof until fully submerged in the liquid. The end of the tool has an angled phased array that produces acoustic beams to scan a sector of the tank floor and wall.   The PC based data acquisition produces a 3D display of the sediment layer and calculates the volume of sediment using the known geometry of the tank.... (read more)
2007-10-23 11:04:52

GraviProbe Delivered for US Survey Equipment Services (SES)

The GraviProbe by dotOcean is a geotechnical profiling system that analyses underwater sediment layers during intrusion. A recent business partnership agreement between dotOcean and MacArtney covering the North American continent provides customers with access to the range of dotOcean sediment and soil measurement products. A GraviProbe has been sold by MacArtney US to SES, supplier of marine survey and navigation equipment for hire, sale and lease purchase. Being a free fall impact instrument analysing the underwater sediment layers during intrusion, the GraviProbe is capable of accelerating and penetrating fluid and consolidated mud layers under its own weight. In addition, the GraviProbe instrument is... (read more)
2016-09-07 09:21:28

Meltwater Lakes under Antarctic Ice Sheet Accelerated Glacial Retreat

During the last glacial period – when the ice in the Antarctic was far thicker and extended further offshore than it does today – it has been speculated that subglacial lakes existed beneath it. An international team of researchers has now successfully sampled the metre-thick sediment layers left behind by these lakes contemporary on the seafloor. This is the outcome of a study by Gerhard Kuhn and colleagues, which was published on 1 June 2017 in the journal Nature Communications. Hundreds of subglacial lakes currently exist beneath the Antarctic Ice Sheet, with Lake Vostok being the largest and best known.... (read more)
2017-06-01 01:09:11

The ROV in Nearshore Site Investigation

Nearshore engineering surveys are undertaken for the purpose of gathering information pertaining to the bathymetry and morphology of the seabed, along with the geotechnical characteristics and geophysical profiles of the sub-stratum. Standard practice tends to involve a low-resolution bathymetric and sub-bottom survey of the approximate area of interest, followed by a higher-resolution, site-specific investigation entailing detailed analysis of the location and form of the materials present. The traditional survey technique in the nearshore region is to use surface towed equipment and jack-up rigs, with diving teams and ROVs (Remotely Operated Vehicles) acting as support systems, performing very basic investigation tasks.... (read more)
2008-01-01 01:00:00

Echologgers for KIOST

Air-borne precision echosounder Echologger Air50 was launched and supplied to the institute KIOST (Korea Institute of Ocean Science & Technology). 12 units of the device were initially installed to study sediment move and tide speed in a swash zone. KIOST intends to deploy more devices to cover a wider area. The Echologger Air50 was to developed to help researchers to find out key parameters of sediment exchange between land and sea using air-borne ultrasound.   (read more)
2016-06-27 04:33:11
Search Filter