Using the Apache Unmanned Survey Vessel

Techniques in Bathymetric Survey
This paper explores the various features of the Apache USV series for efficient seafloor-level mapping. The CHCNAV hydrographic survey software is used for data recording and analysis. It provides results in the form of 3D models of the ground, contours and depth. (This story is brought to you by CHCNAV) Bathymetry is the study and mapping of the seabed or lake bed. It consists of obtaining measurements of the depth of the ocean or lakes and is equivalent to the mapping of the Earth’s topography. In general, only limited information is known about the seabed and lake beds. Existing maps... (read more)
2020-08-05 10:38:58

Mapping Submarine Groundwater Discharge with Thermal Infrared Imaging

Using Cutting-edge Technology and High-resolution UAS
Submarine groundwater discharge (SGD) is a significant part of the water cycle that delivers anthropogenically derived and naturally occurring nutrients to coastal waters. As part of the drive to develop methods to prevent the degradation of coastal water quality, research conducted at the University of North Carolina Wilmington attempts to address the ambiguity associated with SGD point source locations. This case study outlines how cutting-edge high-resolution unmanned aerial system (UAS) thermal infrared (TIR) imaging methods have been coupled with the newest technology for continuous and autonomous SGD monitoring. Submarine groundwater discharge – the process in which groundwater flows down-gradient through... (read more)
2020-07-14 08:21:52

CHC Navigation introduces the P2 GNSS Sensor Series

CHC Navigation (CHCNAV) releases the P2 GNSS Sensor Series providing high accuracy positioning and heading solution in a compact and rugged enclosure. The P2 GNSS Sensor series is the GNSS sensor for a wide variety of applications such as reference station, marine systems, unmanned navigation, industrial automation, robotics and machine control. Easy integration The P2 GNSS series is designed to significantly reduce system integration efforts by combining rich connectivity interfaces including RS232, low latency PPS output, Ethernet, CAN bus protocol and a comprehensive web interface for configuration set-up. Industrial design The new series integrates the latest GNSS technology in a... (read more)
2019-04-11 08:55:22

SBG Systems Releases Horizon IMU for Navsight Marine Solution

SBG Systems has released the Horizon IMU, a FOG-based high-performance inertial measurement unit (IMU) designed for large hydrographic vessels surveying harsh environments. Navsight Marine Solution consists in a powerful and ready-to-use IMU dedicated to hydrographers. It is available at different levels of accuracy to meet the various application requirements and can be connected to various external equipment such as Echo-sounders, Lidar, etc. Completing the product range Navsight Marine Solution already offers two levels of performance with the Ekinox and Apogee IMUs. These MEMS-based IMUs address most hydrographic markets whether shallow or deep water. The Horizon IMU allows customers to bring Navsight... (read more)
2019-03-18 03:22:27

Hydrographic Surveying: Where Do We Stand?

The Ever-increasing Accuracy of Mapping Surface Waters
Hydrographic surveying is highly specific and requires a suite of advanced acquisition and positioning sensors attached to a mobile survey platform as well as sophisticated software to allow the correct combination of all the data. For those in the industry, the advances over the last decade may feel more like an evolution rather than a revolution. If we look back one, two or even three decades, we can see the enormous leap that hydrographic surveying has taken. Where do we stand, and what can we expect for the near future? In this article, we will look at the present compared... (read more)
2018-12-11 02:51:31

SeaRobotics Delivers Two USVs to the Canadian Hydrographic Service

SeaRobotics recently announced the delivery of two additional 2.5m autonomous unmanned surface vehicles (USVs) to the Canadian Hydrographic Service (CHS), a part of Fisheries and Oceans Canada, bringing the fleet to four systems. These USVs, built by SeaRobotics, are complete hydrographic systems including multibeam echosounders, support sensors, cast winches, deployment carts and road trailers. The SeaRobotics USVs are being deployed across Canada supported by regional training performed by SeaRobotics. CHS has completed the first year of operation and the analysis of the efficiency and cost effectiveness of USV usage. A profile of high-productivity, cost-reducing activities is being developed for both... (read more)
2018-06-26 10:37:07

Hydrographic Surveying in the Port of London

Charting for the 21st Century
By the end of this year, the gap will have finally closed on the mandatory requirements for ships to carry an Electronic Chart Display and Information System (ECDIS), with all existing vessels of over 10,000GT being required to be so equipped (all new vessels greater than 3,000GT already have to comply). This article explores the provision of the chart data for the Electronic Navigation Charts (ENC) available to such systems and how the UK's Port of London Authority (PLA), as a major port, is providing such data. This article has been brought to you by Teledyne CARIS To survey the... (read more)
2018-05-15 08:23:35

Hemisphere GNSS Presents Atlas-capable Vector V1000 for Precise Marine Applications

Hemisphere GNSS has introduced the all-new Vector V1000 GNSS receiver, which provides high-accuracy heading, position, pitch, roll and heave data. The V1000 supports multi-frequency GPS, GLONASS, BeiDou, Galileo, QZSS and IRNSS (with future firmware upgrade and activation) for simultaneous satellite tracking. The V1000 is powered by Hemisphere’s innovative and industry-leading Athena RTK engine and is Atlas L-band capable. The new V1000 is designed for professional marine applications, such as hydrographic and bathymetric surveys, dredging, oil platform positioning, buoys and other applications that demand the highest-level 3D positioning accuracies. Based on Hemisphere’s Eclipse Vector technology, the V1000 uses the most accurate... (read more)
2018-03-27 09:10:24

SBG Releases Navsight Marine Solution

At this year’s Oceanology International in London, UK, SBG Systems released the Navsight Marine Solution, a full high-performance inertial navigation solution designed to make surveyors’ tasks easier in both shallow and deep water. Navsight Marine Solution integrates the latest generation of gyroscopes, accelerometers and GNSS receivers. Navsight provides high-performance motion and navigation data as well as a real-time heave accurate to 5cm. To allow surveying when wave frequencies are large or complex, the solution comes with a delayed heave feature. If higher performance is required, the surveyor can count on Qinertia, SBG’s INS/GNSS post-processing software. New calibration procedure for easy installation... (read more)
2018-03-20 11:25:57

World's First Fully Autonomous Hydrographic Survey

No Line Plan, No Boat Crew, Just Sensors
During September 2017, the world’s first autonomous hydrographic survey was performed. 'Autonomous' means not by remote control, but rather that the autonomous surface vehicle (ASV) used guidance from survey software to run pre-planned survey lines or automatically generated lines based on sonar coverage, with human interaction possible but not required. The Channel Coastal Observatory (CCO) commissioned 4D Ocean to undertake a hydrographic survey of the seabed offshore of Hurst Spit, Western Solent, using a SeaRobotics ASV 2.5. The pilot survey was supported by the Maritime & Coastguard Agency (MCA) and UK Hydrographic Office (UKHO). By Duncan Mallace, contributing editor, Hydro... (read more)
2018-02-13 11:36:29
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