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SAFETY4SEA

Global standard for ship hull cleaning a step closer

by The Editorial Team
May 27, 2020
in Green Shipping
biofouling

Above image is used for illustrational purposes only

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BIMCO has moved a step closer to finishing a global set of guidelines needed to protect the marine environment from invasive species and reduce CO2 emissions.

Currently, there is no common global standard for cleaning ships’ hulls to avoid transferring invasive aquatic species, nor for the potentially damaging debris washed off in the process.

Every time a ship call at a port, it brings foreign aquatic species on the submerged parts of the ship, also known as fouling.

In a country like Australia alone, around 30,000 commercial port calls are carried out every year and if their hulls aren’t fairly clean organisms can move from one continent to another, transferring invasive species between marine environments and potentially harm local aquatic ecosystems

said BIMCO.

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The organisms growing on the hull also increase drag and reduce fuel efficiency of the ship by as much as 35%, leading to higher fuel bills and more CO2 emissions.

To ensure that hull cleaning can be carried out in a safe and environmentally sustainable way in the future, a global standard is essential.

The new in-water cleaning standard puts great emphasis on capturing what is removed from the ship, thereby ensuring that the marine environment is not negatively affected. A global standard will create much needed transparency along with economic and environmental benefits for shipowners, ports, port authorities and in-water cleaning companies, believed Aron Sørensen, BIMCO’s Head of Marine Environment.

He also emphasized that it is imperative that the cleaning can be done “in-water”, as there is limited availability of dry docks for very large ships, for example carrying iron ore or crude oil. In addition, the cost to deviate to docks in Asia and unload the ship is extremely high and the added trip to drydock adds to GHG emissions, which can be avoided if cleaning is done in-situ.

Countries like Australia and New Zealand, as well as regions such as Hawaii and California, have already implemented regulation on biofouling on ships arriving in their waters, or are in the process of doing so, as some of the first.

But without a clear, international standard for cleaning, ports will have difficulty identifying which companies clean the ship hulls sufficiently and collect the debris that is washed off the ship to a satisfactory standard. And the same goes for shipowners.

  • If you don’t have global standards, the shipowner can’t know if a supplier in one country – the in-water cleaning company – has done a good job. Furthermore, the port authorities lack a common method to evaluate in-water cleaning companies

Mr. Sørensen says.

There are additional benefits of a global standard:

  • It will collect materials removed from the ship and thus reduce the pollution from heavy metals and paint flakes released into the ocean during underwater cleaning
  • It will reduce the risk to divers cleaning the hulls
  • It will maintain the performance of the anti-fouling systems (ie hull paint)

BIMCO’s aim is to make a standard that is acknowledged by the IMO. Mr. Sørensen is heading a working group that consists of shipowners, paint manufacturers and hull cleaning companies. The group recently sent the first draft of the cleaning standard to a reference group that includes scientists and government regulators. The next step is practical tests of the standard done with a hull cleaning company and a shipowner, which is scheduled to take place during 2020.

An approval standard will address minimum requirements on approving in-water cleaners based on testing verified by accredited laboratories and certificates issued by internationally recognized classification societies. A certificate based on an approval will show that the equipment and the procedures of in-water cleaners of good quality.

The approval standard is still under development and ultimately, BIMCO would ask IMO for adoption of the standard. Such a process would take two to three years.

Global standard for ship hull cleaning a step closerGlobal standard for ship hull cleaning a step closer
Global standard for ship hull cleaning a step closerGlobal standard for ship hull cleaning a step closer
Tags: antifoulingBIMCObiofouling
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