Focus Stories

Every month we will focus on a specific theme, featuring a selection of articles which have previously been published in the Hydro International magazine. By including a mix of older and more recent articles, we will present a complete recap of the subject. Furthermore, we are bringing you a bi-weekly round-up of ‘Focus Stories’ related to the theme through our newsletter (sign up here). The theme for December 2017 is:

Multibeam Echosounders

Must Read

Developments and Trends in Multibeam Echo Sounders

The multibeam echo sounders available on the market are constantly evolving as technology advances and as sonar producers seek new ways of refining and utilising the products. In this article we will provide a snapshot of current products and trends from the dominant (high-e... (read more)

Subsea Cable Route Surveying

Ninety-nine percent of international data is transmitted by around 265 subsea cable systems connecting the world. The total length of subsea cables exceeds 1.6 million kilometres, and they can be found as deep as 8,000m. The cables, which can cost hundreds of millions of dol... (read more)

Increased-resolution Bathymetry in the Southeast Indian Ocean

The disappearance of Malaysian Airlines flight MH370 on 8 March 2014 led to a deep ocean search effort of unprecedented scale and detail in the remote southeastern Indian Ocean. Between June 2014 and January 2017, two mapping phases took place: (1) a shipborne bathymetric su... (read more)



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Multibeam Echosounders

Bering Sea ASV Force Multiplier

TerraSond, a hydrographic services company based in Palmer, Alaska (USA), used a C-Worker 5 (CW5) unmanned autonomous surface vessel (ASV) in conjunction with a 105’ (32m) research vessel from June through August 2016 on a major hydrographic survey in the Bering Sea re... (read more)

What About the Other 88%?

Despite the last decade’s flurry of UNCLOS ECS mapping, the amount of the oceans surveyed remains around 12%. The continuing search for the MH370 wreckage emphasises our scant knowledge of the actual deep ocean seafloor despite the apparently detailed overall picture d... (read more)

Multibeam Data Processing

This article is about the evolution of acoustic sounders imposed on Hydrographic Service’s new methodologies for the interpretation, handling and application of hydrographic information. Considering spatial resolution and high-density data acquired by multibeam echosou... (read more)

Basking in the Dark

Recent hydrographic advances are revolutionising the way the marine environment can be accessed, scanned and quantified. With the emergence of sonar technology and, more recently, remotely or autonomous operating vehicles equipped with sonar, underwater cameras or photogramm... (read more)

Backscatter - From Ping to Database

The Canadian Hydrographic Service (CHS) is willing to make better use of the backscatter intensity data collected with their multibeam sounding systems. All the backscatter data collected during the last 2 decades were not systematically processed and maintained, so a lot of... (read more)

Port of Rotterdam – Innovative Hydrography

The Port of Rotterdam is a leading global port and by far the largest seaport in Europe. The port is situated in the Rhine delta and with its direct connection to Europe’s largest industrial region, the Ruhr area, it is a key entry point to the European market. Underst... (read more)

Excited by Automation Driven by Autonomous Vehicles

NOAA is one of the bigger organisations in the world that has surveying and charting in its portfolio. It’s an immense task as the USA has about 95,000 miles of coastline, important ports and a wide range of users – from recreational boaters to the biggest contai... (read more)

Teaming up for Multibeam Echo Sounder and Sonar Solutions

Teledyne Marine Acoustic Imaging Group is part of Teledyne Marine and is a provider of advanced multibeam echo sounder and sonar solutions servicing a variety of markets and applications. Single-beam echo sounders and entry level multibeam echo sounder systems are manufactur... (read more)

High-resolution Structural Inspection of a Flooded Tunnel

Acquiring accurate data on the structural integrity of submerged tunnels, as well as shafts and underwater caverns, has long been a challenging and costly problem for water companies, hydroelectric schemes and mine operators alike. While dewatering of tunnels is one option t... (read more)

On the Cusp of A New Hydrographic Era

I became director of NOAA’s Office of Coast Survey in late August, and I feel incredibly lucky to be able to take the helm at this dynamic time in hydrographic history. We are on the cusp of a new era in hydrography. I am, like most field hydrographers, very excited by... (read more)
Multibeam Echosounders

Developing the Ocean ­Survey Workforce

Developing qualified ocean surveyors for the marine geospatial workforce requires an educational opportunity that goes well beyond the limitation of classroom and laboratory exercises. The BEAMS Programme focuses on strengthening technical and applied skills in the next... (read more)

Rapidly Identifying Patterns and Problems in Multibeam Datasets

The Naval Oceanographic Office (NAVOCEANO) utilises a diverse suite of survey assets to collect high-resolution oceanographic and hydrographic data in shallow-water areas all over the globe. These assets maintain a high operation tempo, resulting in extremely large data volu... (read more)

Technology in Focus: Multi-beam Echosounders

The evolution of multi-beam echo sounders (MBES) is leading to systems with enhanced capabilities in their traditional markets, but also provides features to allow the expansion of their use into new areas and applications. This short review highlights some of the features o... (read more)

Very Shallow Water Survey - a New Approach

Hydrographic surveys in very shallow waters can have several applications such as nautical chart updating, performing environmental monitoring and characterisation, determination of dredged volumes, establishing navigational channels or defining general coastlines. When full... (read more)

Getting to the Bottom of Our Ocean

Two-thirds of our planet surface is covered by water and yet what lies underneath is a mystery to us. We know the ocean controls our weather and climate and is home to an estimated half of all species on Earth. However, 95% of the ocean still remains unexplored. We have high... (read more)

Echo Sounders versus Air Bubbles in Research Vessels

Within echo sounding circles it is well known that air bubbles may have a negative effect on echo sounding systems. This article briefly presents the German way of dealing with air bubbles from sweep-down and cavitation processes as well as our experiences with the last thre... (read more)

Searching for HMS Terror

“We know where the target is not located” is the only guaranteed result of any search expedition. This statement does not make for exciting headlines, however, the value of knowledge gained during the search itself and its many benefits to a variety of end-users,... (read more)

AUVs in Hydrography

The US Navy and the Naval Oceanographic Office (NAVOCEANO) are committed to realising the vision that Autonomous Underwater Vehicles (AUVs) are available, affordable, and can play a critical role for many applications. Working in partnership with NAVOCEANO and the Office of... (read more)

Multibeam Systems for Extreme Environments

The search for resources and energy reserves for the future is continuously increasing in the polar region. More and more states are trying to stake their claims and to register their rights. For the same reasons, the clarification of the exact borders of the continental loo... (read more)

Next-generation Surveyors Using Next-generation Technology

Twenty 3rd-year students of ocean technology from the Maritime Institute Willem Barentsz (MIWB, The Netherlands) participated in the 4th edition of the Lake Survey. Building on last year’s experience and together with three new partners, Teledyne CARIS and Fugro w... (read more)
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