TIMM's Innovative Rope Design Improves Vessel Safety

mooring lines

writer icon Peter Karlsson     Artak Petrosyan   |   Business     🕐 01. Jul. 2020

Maersk will begin implementation of an innovation called Snap Back Arrestor (SBA) ropes on the mooring lines used to hold vessels in place while docked in port for loading and unloading.

The Importance of the Mooring Rope
Mooring is one of the most dangerous aspects of port and vessel operations.
When a mooring rope holding a docked vessel snaps, the abrupt energy release can cause the rope to whip across the dock and ship at a speed of almost 500 MPH or more than twice the speed of a NASCAR level race car.

Creating the Best Rope backed by Technology
Working closely with suppliers to solve this industry challenge Maersk have chosen the Norwegian manufacturer, TIMM Ropes, who offered new mooring rope technology which features a special core that elongates more than the surrounding rope, acting to absorb and dampen the tremendous energy released when mooring ropes break while under strain.

As a result, instead of snapping back in unpredictable ways at great speed, a broken SBA rope will simply drop to the ground.

The new ropes are also coloured with a Maersk blue colour stripe, making it easier for operators to spot any damage or twists in the rope that could affect breakage. This is another important visual feature developed to enhance the safety of people working in our industry.

The SBA Rope Technology
Once the SBA concept was verified by snap tests at the TIMM Ropes manufacturing facility, several Maersk vessels were enrolled in a nine-month pilot project in 2019 to ensure the rope’s operational conditions, alongside traditional mooring ropes, using vessels of various sizes.

Collaboration with TIMM Ropes ensured the standardisation of the new SBA mooring rope sizes and compatibility with existing mooring designs.

“This SBA rope technology embraces one of the fundamental elements of our 'Safety Differently' approach, by building in capacity to safeguard people,” said Aslak Ross, Maersk’s Head of Marine Standards.

Each year Maersk buys and replaces some 1 000 mooring ropes. This leads to an annual expense of nearly USD 2 million.

Implementing Rope Exchange Program
Traditional mooring ropes have a five-year lifespan and Maersk will be implementing an exchange program in which their current, high-quality mooring ropes will be replaced at the end of their lifecycle with SBA enhanced ropes at a pace which also reflects the supply and availability.

Full fleet implementation of the new SBA ropes is planned to be completed within five years.

“This new technology and innovative approach enable us to safely transform the mooring rope approach in our industry and help lead by example to protect our seafarer community and our dockworkers ashore,” added Ross.

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