Preparing for hydrographic survey Marlborough Sounds

Equipment choices for our new survey in Western Marlborough Sounds, NZ

iXblue is excited to have commenced preparations last week for a new survey project in New Zealand, which we’ll be undertaking with several local partners including Discovery Marine Limited (DML) and NIWA. It’s a joint hydrographic survey project between Land Information New Zealand (LINZ) and the Marlborough District Council (MDC), and will take place in…

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Drix capabilities demonstrated to industry in Auckland

iXblue is one of several firms leading the charge into the domain of unmanned and autonomous survey vessels, suitable for use in offshore applications. During my visit to the Ocean Business Exhibition in Southampton, in April 2019, there were unmanned survey vessels of all shapes and sizes everywhere you looked.  There is no doubt that…

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Unmanned survey vessel drix

South Pacific Survey Achieves a Few World Firsts

The world’s first ever survey project (of scale) using Satellite Derived Bathymetry (SDB), Airborne Bathymetric Lidar (ABL) and a vessel mounted multi beam echo sounder was successfully completed in Tonga on Christmas Eve. The challenges were many, including the scale of the project, shallow waters in places, some unchartered waters and old data and charts…

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The Fun and Challenges of the DriX Maiden Survey in Tonga

  From concept to maiden nautical charting survey in just two years is an incredible feat.  And how privileged the iXblue survey team is to not only conduct the maiden survey of the Unmanned Survey Vessel (USV) DriX, but to do so in a region as beautiful as Tonga. Two years ago, this vessel was…

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IXblue Boat

How iXblue is Significantly Reducing Survey Costs

  The second half of 2018 is shaping up to be a very exciting one for iXblue Australia, with a few large survey projects in progress. We also have several survey system development projects underway.  These are nearing completion and should allow us to undertake testing and trials before the end of the year. New…

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sound velocity probes

Why we use Two Types of Sound Velocity Probes

It’s critical to data accuracy that sound velocity is applied during post processing. Rhys Davies, our Senior Surveyor discusses the two types of probes that iXblue uses. The first is a portable system – dubbed the ‘mini svp’ which is hooked up to a line and lowered by hand to the sea floor to measure…

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tidal gauge calibration

A Better Method for Calibrating a Tide Gauge

When conducting a hydrographic survey, the conventional method used to calibrate a tide gauge is to use a tide pole. The big disadvantage of doing it this way is that it usually requires someone to be on site for up to 26 hours, making it a labour intensive and expensive process. iXblue has a much…

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hydrographic survey target detection test

Hydrographic Survey – Target Detection Testing Process

Some of our clients request proof of the multi-beam echo sounder’s target detection performance. Senior Surveyor Dave Mundy of iXblue explains the process, which involves ground troofing of the multi-beam against a physical object of known dimensions.  He demonstrates the process, whereby a pre-fabricated one metre cube is lowered to the sea floor at approximately…

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multi-beam patch test

A Multi Beam Patch Test – Why It’s Necessary

We conduct patch tests on our multi-beams to detect any fine misalignment between the survey sensors, allowing us to produce a highly accurate and finely calibrated data set. Senior Surveyor Dave Mundy explains the method, which involves post process analysis of the multi beam data to determine angle offsets in the transducers and motion sensors.…

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Surface Check

What is a Reference Surface Check and Why is it Needed?

During the mobilisation process, a Reference Surface Check is conducted using the multi-beam to determine if a surface has been sounded to the most accurate standard. Dave Mundy, iXblue Senior Surveyor explains the process involving motion lines, motion corrections, cross checking against the initial reference surface check.

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