Friday, September 17, 2021
Published: Jul 2015

How to produce bathymetric products within one day after surveying.

The Port of Rotterdam is an open deep-water port in theriver estuary Maas. The location of the port in an estuarineenvironment necessitates maintenance dredging due tosiltation ’attacks’ from both tidal current and riverdischarge. Siltation from the sea, coming in during theflood tide and eroded materials from the hinterlandtransported in the river flow results in a total of 6.000.000m3 of maintenance dredging works in the port basinsevery year.

  • Port-of-Rotterdam-image.jpg
  • Graph-1.jpg
  • SeaBat-7125SV2.jpg
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  • Laserscan-Data.jpg
  • Port-of-Rotterdam-image.jpg
  • Graph-1.jpg Dredging information based on difference of latest multibeam surveys and maintenance levels
  • SeaBat-7125SV2.jpg SeaBat 7125 SV2
  • Graph-2.jpg Weekly ENC production based on latest multibeam surveys
  • Laserscan-Data.jpg Combined 7K Multibeam – Laserscan data


The Port of Rotterdam is an open deep-water port in theriver estuary Maas. The location of the port in an estuarineenvironment necessitates maintenance dredging due tosiltation ’attacks’ from both tidal current and riverdischarge. Siltation from the sea, coming in during theflood tide and eroded materials from the hinterlandtransported in the river flow results in a total of 6.000.000m3 of maintenance dredging works in the port basinsevery year.

To control the dredging activities the Port of Rotterdamconducts hydrographic surveys on a daily basis. Two

purpose built survey vessels are operated by the AssetManagement department of Port of Rotterdam.

The survey vessels are equipped with Teledyne RESONSeaBat multibeam echosounders (model 7101 and 7125),RTK GNSS positioning and silt density equipment (Silas-Odom CV2).


Continuous multibeam surveys result in large datavolumes and processing time. The goal of the Asset

Management Department is to produce bathymetricproducts within one day after surveying. Products are:

• Bathymetric paper chart for vessel traffic management

(VTM) and dredging operations

• Electronic Navigation Chart (ENC) for portable

pilotunits (PPU)

• ASCII gridded data sets for dredging equipment andGIS


Shipping, berth occupancy, satellite blocking by cranes orcontainer stock piles, sea water mixtures and fluid mudbottoms are a continuous threats to the quality andproduction rate of the bathymetric surveys. To save processing time the Asset Management Department try tokeep up the ‘first time yield’ level. This process starts withhigh quality raw multibeam data input. Cleaning datafilters will run faster and more accurate based on almostclean raw data obtained from the best available surveyequipment

Survey operations

Typical port hydrographic surveys contains locations withslopes, various bottom types and man-made constructionsin a relatively small area requiring the use of an all-roundmultibeam echosounder system that provides:

• Wide beam coverage to get depth data as close as

possible to water level on slopes

• Single transducer head (complexity and datareduction)

• Excellent object detection

• Variable pulse length settings to optimize acoustics for

fluid mud bottoms

• High update rate for survey speed up to 10 knots

• Side scan option

The Seabat 7101 and 7125 meets all the requirementsmentioned above. The data quality is very good hence

hardly any data cleaning is necessary post survey. Thebeam selection settings (to set area of interest) and systemdisplays are features that make these systems particularlyuser friendly.


Since the end of 2012 the Asset Management departmentof the Port of Rotterdam developed a range of efficiencyefforts to reduce the need for survey personnel andequipment. These efforts resulted in a reduction of abouthalf a survey vessel, representing a cost saving ofapproximately €150,000 per year; in part due to theupgrade of the muliteam systems to the Teledyne RESONproducts mentioned above.

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Introducing Teledyne Marine Multibeam Echosounder and Sonar Solutions

Teledyne Marine is a leading provider of advanced multibeam echosounder and sonar solutions servicing a variety of markets and applications. By delivering the most advanced acoustic technology solutions Teledyne Marine provides high resolution, accurate, dependable, long lasting solutions to our customers.

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High Quality Surveys Using hybrid AUVs and state of the art hydrographic data acquisition software

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Data•Xchange Delivers

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HYPACK Inc.: Experts in Hydrographic Software

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Unmanned maritime vehicles (UMVs) have been under development for decades. Since the late 1990s, several systems have evolved beyond research labs and have become commercial realities. These tools are now in routine use for scientific, commercial and military applications.