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French ports combatting vessel surging

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In order to offer optimum service to its customers during their calls at Le Havre, Haropa Port has installed a ShoreTension system.

Ships regularly have difficulty in keeping securely alongside quay, a problem known as ‘surging’, which refers to back and forth movements by the ship along the terminal berth. Such movements are generally encountered when other vessels pass nearby.

The operator conducted a study in 2019 involving installation of centimetric GPS units on around forty ships. The objective: to measure and qualify such effects with a view to considering potential technical solutions.

Building on the results obtained, the port decided to equip the port with the ShoreTension solution developed by KRVE, boatmen operating in the port of Rotterdam. This consists of special mooring ropes in Dyneema (an ultraresistant polyethylene fibre) attached to hydraulic rams. This standalone system is additional to the ship’s conventional mooring.

The ShoreTension system is positioned on the quay between two bollards and can be used in different configurations:

–          on the bow and stern lines or the breast lines to counter ship movements away from the quayside in the presence of offshore winds;

–          on the spring lines to counter surging.

Using solar power, the system records the data remotely, most notably enabling terminal operators and ships’ masters to monitor the applied tension in real time. The port actors concerned automatically receive a text message immediately the system registers an abnormal level of tension on a mooring line. The system also offers greater flexibility since it can be positioned on any quay, irrespective of level.

The total cost of the investment for Haropa Port (acquisition and installation) was €770,000.

Source: www.maritimejournal.com

Image: www.pexels.com

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