MBES Training Course Completed

In August 2012, UK-based Swathe Services & HydroCharting delivered the first in a series of new multibeam echo sounder (MBES) training courses designed to give hydrographic surveyors hands-on experience on how to set-up, interface, calibrate and operate MBES equipment. This, combined with in-depth training on QPS QINSy and Qloud, resulted in surveyors gaining valuable knowledge and experience which enabled them to undertake MBES surveys independently. This first course was also supplemented by the provision of equipment and first-class instruction from Adrian Gibbon from Applanix and Ben Dean from C-NAV who both gave classroom-based lectures and on-water instruction on how to... (read more)
2012-08-17 01:00:00

Improving MBES Measurements

HYDRO 2006 Best Student Paper
In dynamic water environments such as the Maasgeul waterway off the Dutch coast at the Port of Rotterdam, tides and a varying presence of salt and freshwater from river run-off can cause considerable variation of the water column sound speed profile (SSP). It is important to adequately correct bathymetric data for sound refraction effects in the face of limited SSP information. A new approach, described here by case study, requires and exploits the multi-beam echo sounder (MBES) in surveying adjoining swathes with overlap. To maintain safe passage of ships along the waterways leading to the Port of Rotterdam, water depth... (read more)
2007-02-02 12:00:00

Jan de Nul to Operate NORBIT MBES

NORBIT has secured orders from Jan De Nul Group, through its Benelux dealer Seabed BV, for several tightly integrated all-in-one turnkey multibeam sonar systems. These compact survey systems allow for fastest set-to-work on any size of survey platform while allowing for highest-quality broadband FM data from a forgiving curved receiver array. The systems each include a full inertial navigation system and surface sound speed probe and only one cable from the wet end to the small splash-proof topside. Norbit is conducting demos aboard the AHOY Freedom during OI 2016, taking place in London from 15-17 March, where the iWBMS is being showcased... (read more)
2016-03-11 12:05:47

MBES and Laser Scanning Training Course

In January 2014, UK-based Swathe Services will be working with Hydrocharting to run a multibeam echosounder and MDL laser scanning training course with QINSy software. This training course offers hands-on training with high-spec hydrographic survey equipment and will be conducted by experienced trainers with 3 days of boat-based training and 2 days of post processing. The 5-day course will be held in Southampton, UK, starting on Monday 27 January 2014 and finishing on Friday 31 January. Training will be given by James Williams of Swathe Services and Jesper Højdal of Hydrocharting using SONIC 2020 and SONIC 2024 multi-beam echosounders alongside... (read more)
2013-08-13 10:20:45

It All Starts with Hydrographic Charting

Three years ago large coastal hydrographic charting-based projects had become globally prolific. Thanks to the reliability of modern technologies and methodologies, such larger programmes were not only doable, they had become preferable and were even moving toward 'routine'. Today we can identify a similar trend related to multiple, diverse deepwater applications of large-scale programmes that all rely on MBES-based hydrographic charting applied regionally. The examples presented here demonstrate how large-scale, precision MBES-based programmes are being applied to deepwater studies far beyond improving navigation charting and safe navigation goals. By Edward J. Saade, Fugro Survey Division Americas Region, USA Seafloor Seeps... (read more)
2015-08-13 08:35:00

It All Starts with Hydrographic Charting

Three years ago we discussed the global proliferation of large coastal hydrographic charting-based projects. The main theme being that modern technologies and methodologies have become so reliable that these larger programmes were not only doable, they had become preferable and even moving toward ‘routine”. Today we can identify a similar trend related to multiple, diverse deepwater applications of large scale programmes that all rely on MBES-based hydrographic charting applied on a regional scale. The examples presented here demonstrate how large-scale, precision MBES-based programmes are being applied to deepwater studies far beyond improving navigation charting and safe navigation goals. Seafloor Seeps... (read more)
2015-07-28 02:40:30

Geochemical Campaign offshore Honduras

Fugro has been awarded a contract by BG International Limited Sucursal Honduras to conduct an integrated multibeam echosounder (MBES) survey and seabed coring campaign over its offshore acreage (block) in the Honduran Caribbean. As part of BG’s exploration licence commitments, the campaign will map the seafloor to interpret, identify, sample and analyse potential hydrocarbon seeps. Fugro’s 65-metre survey vessel, MV Fugro Brasilis, commenced the two-month mapping and interpretation portion in July 2015. The MBES and seabed coring programme will cover an area of the Patuca Basin in excess of 10,000 km2 in the northern part of the block. Features of... (read more)
2015-08-03 12:16:55

Societies News

Hydrographic Society BeneluxThe Europort 2009 exhibition was held in Rotterdam from 3rd to 6th November 2009. Coinciding with this exhibition aimed at the shipping industry there were several other events such as the CEDA Days and an international workshop organised by The Hydrographic Society Benelux (HSB). The HSB's workshop theme ‘Reality and future in underwater imagination', was linked to the theme of the exhibition ‘Advanced Technology: Imagination becoming reality'. As many exhibitors were directly interested in hydrography, for example, positioning, underwater acoustics, and ROV's, the workshop was very well attended. Mr. Karstein Vestgård, vice president Autonomous Underwater Vehicles (AUV) projects... (read more)
2010-02-15 12:30:17

Stop Using DGPS!

The Unsuitability of Non-centimetric Positioning for Shallow-water MBES Surveys
High-resolution multi-beam echo sounder (MBES) surveys should not be conducted where the uncertainty of the horizontal positioning system is larger than the nadir footprint of the MBES at the mean survey depth. In depths of 100 metres, the horizontal component of the nadir footprint of a 0.5 degree by 1.0 degree MBES, is an ellipse whose minor axis is approximately 0.9m, and approximately 0.09m at 10m depth. Regardless of the International Hydrographic Organization (IHO) Special Order Specification that allows for non-centimetric level horizontal positioning, such as Differential GPS (DGPS), the results are unacceptable for high-resolution shallow-water surveys, especially where feature... (read more)
2012-11-22 02:55:10
Search Filter