International Cable Protection Committee


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Anchors and Anchoring

Updated Tuesday 28 July 2015
Anchor Penetration Trial in the German Bight to Optimise Cable Burial Depth. Microsoft Office PowerPoint 97-2003 Presentation (.ppt) - 6.20 MB
A PowerPoint presentation by Dr. Anja Drews of TenneT, M. Pezold and D. Sinclair.

Anchor Tests German Bight - Test Setup and Results Adobe Acrobat Document (.pdf) - 5.91 MB
This report describes anchor dropping and dragging tests that have been performed at three locations in the German Bight. Multiple parties (BAW, BSH, Deltares, TenneT, WSV) were involved in the preparation, execution, data collection and interpretation of the tests. Data and partial interpretation thereof, as provided by the various parties are presented in this report. Aim of the tests was to provide insight in the depth to which ships’ anchors can endanger (buried) cables. Across all three sites measured penetration depths ranged from 0.19 m to 0.69 m for the 8.5 t AC-14 anchor and from 0.26 m to 0.88 m for the 11.5 t Hall anchor. Accounting for measurement uncertainties, it was concluded that for none of the anchors more than 1.0 m penetration below the seabed could be detected due to anchor dropping and/or anchor dragging.

Investigation of Ship Anchor Penetration and Anchoring Tests. Report on a Survey of Anchor Penetration Depth (English Language Document) Adobe Acrobat Document (.pdf) - 2.11 MB
In the period of 29 April 2013 to 05 May 2013, in a large-scale field study in the German Bight studied the penetration of anchors by means of practical anchoring tests. In addition to the BAW - DH, the Federal Maritime and Hydrographic Agency were (BSH), the grid operator TenneT and the Dutch research institute Deltares were involved. The reason for the investigation is the question of whether submarine cable can be installed in the area of maritime shipping lanes at a reduced burial depth without an increased risk potential from anchors.

Investigation of Ship Anchor Penetration and Anchoring Tests. Report on a Survey of Anchor Penetration Depth (German Language Document) Adobe Acrobat Document (.pdf) - 6.64 MB
In the period of 29 April 2013 to 05 May 2013, in a large-scale field study in the German Bight studied the penetration of anchors by means of practical anchoring tests. In addition to the BAW - DH, the Federal Maritime and Hydrographic Agency were (BSH), the grid operator TenneT and the Dutch research institute Deltares were involved. The reason for the investigation is the question of whether submarine cable can be installed in the area of maritime shipping lanes at a reduced burial depth without an increased risk potential from anchors.