IMCA revises offshore survey guidelines

Offshore staff

LONDON – Members of the International Marine Contractors Association’s (IMCA) Offshore Survey Division Management Committee have extensively revised its Guidelines for the Use of Multibeam Echosounders for Offshore Surveys (IMCA S 003 Rev 2) to bring the document up-to-date with current technology and practice.

In addition to a glossary of terminology and an introduction, there are sections on multibeam echosounders (overview, installation and operation, transducer, navigation and attitude, motion sensor, heading, synchronised timing, offset measures, water level adjustments, and sound velocity measurements); subsea vehicles and systems; sensor installation, calibration and location; calibration tests (patch tests); MBES data processing; standards for MBES surveys; survey planning; and a bibliography.

“The growth in the use of multibeam echosounders in the past two decades has been in part due to the ability of these instruments to cover wide swathes of the seafloor in a single pass. In addition, increases in processing power and availability of data storage at reasonable prices have made the technology accessible to a wider range of users,” explains IMCA’s Technical Director and Acting CEO Jane Bugler.

Printed copies of the 54-page document, which draws heavily on a number of existing standards and published papers, are now available for downloading free-of-charge for members and non-members from the IMCA website.


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