Choosing the Right Sonar Imaging System for Autonomous Underwater Vehicles

Multi Aperture Sonar - a Low-logistics Alternative to SAS
Underwater vehicle operators have to make a choice when deciding on a sonar imaging system to integrate on their systems. The decision could result in a trade-off, with a choice to be made between achieving high levels of range and resolution, and power and weight budgets. The decision made can impact the value of the subsea survey, classifying and mapping operations. But does it always have to be a trade-off?  What is a Multiple Aperture Sonar? In multi-aperture sonar (MAS), the dynamically focused multibeam input from 32 elements is used to extend the focus along the whole swath. Multiple apertures... (read more)
2019-01-29 08:25:14

The Study of Mapping the Seafloor

What is the Difference Between a Bathymetry Chart and a Hydrographic Chart?
This article will immerse you into the deep water of Bathymetry. It explains in detail what a bathymetry map is, what it shows, what methods we use to collect the bathymetry data and last but not least, how to create a good quality bathymetry map. It will also cover the difference between a bathymetry chart and a hydrographic chart and the techniques our ancestors used in the past to collect and record depths? What is Bathymetry? Bathymetry is the study of mapping the seafloor. Bathymetric maps represent the ocean (sea) depth as a function of geographical coordinates, just as topographic maps... (read more)
2019-01-15 08:58:54

Mapping the Seafloor with Remote Sensing and Satellite Imagery

An Analysis of the Techniques and Benefits of These Methods
70% of the Earth is covered by water, but so far just 7% of it has been surveyed (Mars, Venus and the Moon are better surveyed). Hydrography as a science has changed dramatically since the first measurements were made by Alexander Dalrymple and James Cook with lead lines and sextants. Singlebeam echosounders were invented in the 1920s – a technology still used today for mapping the seafloor. This method of using echosounders can produce very high-resolution bathymetric data but the high operational costs and the slow working process make it economically unsuitable for covering large areas. However, with the ongoing expenses of... (read more)
2018-06-19 09:23:54

Proactive Dredging in the Dutch Wadden Sea

Morphological Monitoring and Forecasting through Development of a Maintenance Management System
The navigation channels in the Dutch Wadden Sea require continuous maintenance due to unceasing sedimentation of sand and mud. This article describes the data management workflow and adopted technologies for a maintenance management system (MMS) used for morphological monitoring and forecasting of the various navigation channels. In 2016, the Dutch Department of Waterways and Public Works awarded a multiannual contract to contractor Gebroeders van der Lee to maintain the navigable waterways and harbours in the Dutch Wadden Sea, where HKV Consultants supports the development, operation and maintenance of this MMS. The challenge of working in these conditions is to find... (read more)
2018-05-22 11:06:18

3D at Depth Launches Subsea Survey Support Services

3D at Depth, an expert in subsea Lidar laser technology, has officially launched its subsea survey support services to help clients realise additional value from their underwater 3D data. The new integrated offering will optimise underwater survey campaigns through a comprehensive range of client deliverables designed to enhance workflow efficiencies, support engineering and analysis and provide insight into long-term asset and environmental integrity.   Subsea survey support services provide: 3D Data Services: Data collection and processing, through visualisation and analysis A tiered data management offering starting with Level #1 subsea Lidar laser equipment rentals through Level #7 subsea Lidar data... (read more)
2018-03-20 09:55:11

3D at Depth Reaches Milestone in Offshore Lidar Metrologies

3D at Depth, a global provider of advanced subsea Lidar (SL) systems and survey support services, has completed its 300th subsea Lidar spool metrology. The subsea Lidar measurement, conducted offshore within the Mediterranean Sea, covered eight long spool metrologies with lengths greater than 90m and was completed in 24 hours. The project delivered considerable savings overall for the EPIC installation contractor and provided valuable 3D data for the oil and gas major (end user). 3D at Depth is the world’s leading expert in subsea Lidar technology and first introduced subsea Lidar metrologies for the offshore market 3.5 years ago in the... (read more)
2018-02-01 10:27:35

OceanAlpha Delivers Innovative USV Solution to Mining Industry

OceanAlpha’s autonomous bathymetric survey boat, the ME40 for hydrographic survey, has been applied in the mining industry for tailing dam surveys, in addition to its common application in lakes, rivers, reservoirs and oceans. All that is necessary is to set up the survey waypoints; the boat can then acquire online bathymetric data automatically based on GPS navigation. Water and tailing management is a key control process in mine management. Bathymetric surveys of tailing dams are important because the pond floor under the water is constantly changing and the water volume storage is therefore also changing. Local authorities may also require mining companies to... (read more)
2017-12-21 10:43:50

Delivering a Subsea Lidar Virtual Reality Data Platform

3D at Depth, a global provider of advanced subsea Lidar systems and solutions, has partnered with iQ3Connect to deliver a new data visualisation tool to help clients build, maintain, map and monitor subsea assets, environments and resources. The partnership leverages the innovative features of 3D at Depth’s subsea Lidar data and the power of iQ3’s augmented reality (AR) and virtual reality (VR) platform to transform the value of offshore survey data. Powered by iQ3’s cloud-based software platform, customers can access 3D at Depth’s subsea Lidar data through a secure, optimised web-based portal. The technology creates an immersive VR environment with... (read more)
2017-12-12 10:23:04

Snow Crab Tracking Using Wave Gliders

New Technology Bringing Science and Industry Together
Coastal communities around the globe are seeking better ways to understand and manage regional ecosystems. They depend on the ocean to sustain economic opportunities, ensure food security and safeguard fragile environments and species. For harvesters, scientists and government organisations in Nova Scotia, Canada, timely, accurate and comprehensive data on movements of valued species as crab is essential for designing effective fishery management regimes. Ocean Tracking Network (OTN), the Canadian government and local harvesters have been tagging and monitoring aquatic animals for years. But not all tracking methods are practical or cost-effective for highly mobile, yet slow moving animals like snow... (read more)
2017-06-19 01:57:59

Centralised Data for Hamburg Port Authority

From Ping to Chart
The Port of Hamburg is the third-largest container port in Europe and among the biggest in the world. There are almost 300 berths with a total of 43 kilometres of quay servicing around 9,000 ships per year. The Hamburg Port Authority (HPA) is responsible for the management of the harbour and has its own hydrographic survey department. This department collects its own multibeam and laser data which is augmented with additional data collected by the land survey department of the HPA and with data from external organisations. All bathymetric data is stored in a central Bathymetric Database (BDB) and from there disseminated... (read more)
2017-06-13 02:19:51
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