Mooring Tension Measurement

Ports and terminals worldwide face the challenge of dealing with ever larger vessels and cruise ships. Also, due to climate change, more extreme weather conditions are having an impact on the levels of strain the mooring lines are subjected to. Strong wind, waves and currents mean that even when docked, ships are constantly in motion. This means the tension placed through mooring lines is changing all the time, contributing to material fatigue and reducing service life. Additionally, if one or several mooring lines experience higher tension levels than others, there is a real risk of the mooring line breaking, resulting in potential damage to the jetty and to personnel.

To ensure a vessel stays securely docked, the tension in each mooring rope must be subject to the same loading or tension, or as close to as possible. This can be achieved through the installation of a mooring tension measurement system, which continually monitors the loads on each mooring line, so that any instances of overload or underload can be identified immediately. Port operators can then alert vessel masters so that they can take prompt corrective action to evenly redistribute mooring line loads.

The mooring measurement systems that LCM Systems supply use either load measuring pins installed into quick release mooring hooks, or load shackles/load links that are installed into the mooring line structure and secured to existing port mooring facilities. The load measurement data provided is then usually fed into a PLC system, but a separate read out can be provided where appropriate (usually in smaller ports and harbours). This can also include alarms that are triggered in the event of overload situations.


What Mooring Tension Measurement Applications have LCM Systems already satisfied?

Please review some of the recent news items relating to Mooring Tension Measurement load cells, load pins and associated instrumentation that we have supplied to our customer base. These will help demonstrate the experience we have in finding solutions for our customers, in a addition to the standard product offering available for this application.

9.5 Tonne Submersible Load Shackles

These four 9.5 tonne load shackles have been ordered by a Canadian company and will be used to monitor the tension in the mooring lines of wave powered desalination devices.


17 Tonne Submersible Data Logging Load Link

We have recently supplied this 17 tonne rated submersible load link that incorporates a data logger to a company in Spain. It will be installed 30 metres subsea in the mooring line of an offshore floating buoy.


25te Submersible Load Shackle

This 25te subsea load shackle has been despatched to a UK tidal turbine company. At their request it was designed to have no stainless steel components in order to minimise corrosion.


285te Shackle Load Pins

These 285te load pins will be fitted into load shackles and used for mooring line load monitoring on a single point mooring buoy. 


Submersible Load Link With Data Logging

This stainless steel 8 tonne load link has been manufactured for a fish farm company in New Zealand, and will be used to monitor the tension in the mooring lines of large offshore floating fish tanks.


55 Tonne Wireless Load Shackles

On Thursday last week we received an order for five of our wireless 55 tonne TELSHACK-B load shackles, which were required urgently for a project in the Gulf of Mexico.