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

Valeport Sensors Selected for New Micro AUV

Valeport has recently collaborated with ecoSUB who produce a micro AUV that is both advanced and cost-effective. The small and robust sensors are assisting Autonomous Underwater Vehicle (AUV) manufacturers and users to not only get the data they require, but to make AUVs more accessible in the marine environment. ecoSUB is a micro AUV (0.5 metres long) that uses Valeport’s sensors to autonomously acquire sound velocity profiles and has been jointly developed by Planet Ocean and Marine Autonomous Robotics Systems (MARS) group at the National Oceanography Centre (NOC) in Southampton. Part funded by Innovate UK and the UK Defence Science... (read more)
2018-12-17 09:16:40

Hydrographic Surveying: Where Do We Stand?

The Ever-increasing Accuracy of Mapping the 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

Collaborating to Make ROVs Small and User-friendly

Putting together a highly specified remotely operated underwater vehicle (ROV) is a complex business, requiring fluid integration of components and software from several different manufacturers. Getting it all to work together takes a high level of collaboration between professionals, located around the world. When VideoRay was designing a subsea vehicle so compact it could be checked in as luggage at the airport, it teamed up with Nortek to keep the size down, while keeping the positioning accuracy high. A case in point is the deployment of Nortek’s DVL1000 Doppler Velocity Log on the Defender models now being produced by Pennsylvania-based... (read more)
2018-10-23 09:44:24

The Making of RV Kronprins Haakon

New Norwegian Ice-breaking Research Vessel
Norway is a maritime country with a very long coastline, plus it is very much a polar nation with 80% of its sea territory and 45% of its land mass north of the Arctic circle. It is the only country with territorial claims both in the Arctic and the Antarctic. In spite of this, Norway has not had a purpose-built polar research vessel since Roald Amundsen’s Maud (1917), having instead relied on converted commercial vessels for such purposes. That has all changed, however, now that Kronprins Haakon has come into service. This article provides insight into the making of this new multi-purpose research... (read more)
2018-04-17 10:51:23

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

Olex Integrates Spatial Inertial Navigation System into Marine Vessels

Nexans Olex has successfully integrated Spatial, an inertial navigation system, into its hydrographic vessel. Spatial is a ruggedised miniature GPS-aided inertial navigation system and AHRS that provides accurate position, velocity, acceleration and orientation. It combines temperature-calibrated accelerometers, gyroscopes, magnetometers and a pressure sensor with an advanced GNSS receiver. Olex was seeking a new inertial navigation system in their multibeam sonar mapping systems for two key reasons. Firstly, they needed more accurate position and orientation data than their existing inertial navigation system could provide. Secondly, affordability was a central objective to help widen the market for inertial motion sensors and bring in... (read more)
2017-12-20 01:58:47

The Arctic Field Party

It seems ironic that in the early stages of the Cold War, the United States Government sent surveyors and hydrographic engineers to the coldest reaches of the North American continent. For these men, it was truly a Cold War. From 1945 through 1953, field parties of the United States Coast and Geodetic Survey were sent to survey sea routes through the Bering, Chukchi and Beaufort Seas as well as to conduct geodetic surveys to help position Distant Early Warning system radars and help delineate the vast resources of the Alaskan Arctic. These men toiled in obscurity beneath the midnight sun... (read more)
2017-07-04 11:00:42

High-performance OEM GNSS Sensor for System Integrators

Trimble has introduced the Trimble ABX-Two OEM GNSS sensor. The ABX-Two delivers precise heading, pitch, roll and 3D positioning information. With two internal MB-Two modules, the ABX-Two offers a third antenna option that provides a drift-free, absolute attitude solution. The ABX-Two is an ideal solution for a wide variety of applications such as agriculture, automotive, aviation, construction and marine systems. The ABX-Two is a compact, lightweight and weatherproof enclosure that is built around two MB-Two modules. The sensor allows a wide range of voltage inputs and maintains low-power consumption regardless of the voltage. The ABX-Two speeds the integration process with... (read more)
2017-04-10 01:03:06
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