Performance Verification Study

11.20am – 11.40am, 27 September 2024 ‐ 20 mins

Biofouling Management: Ship Operations & Technology

Transport Canada is taking action to safeguard Canadian waters from the introduction and spread of non-indigenous species (NIS) through marine shipping. Vessel biofouling is one of the primary vectors for the transfer and introduction of NIS into Canadian waters.

Biofouling occurs when microorganisms, plants, algae, and animals accumulate on structures that are exposed to an aquatic environment, such as a vessel's hull. This can bring foreign species to Canadian waters or move them between ecosystems within Canada. These species can become invasive and harmful in their new habitats.

Additionally, biofouling can increase a vessel's drag, which leads to higher operating costs, fuel consumption, greenhouse gas emissions, and underwater noise. Since biofouling begins to develop within hours of a vessel entering the water, all vessels have the potential to transport NIS. A vessel’s level of biofouling is affected by many factors including the condition and type of anti-fouling system (AFS), season, mooring time, vessel speed, recent travel history, and water salinity levels and temperature.

Biofouling can be managed by cleaning a vessel in-water. However, it is important to note that cleaning a vessel in-water can also release organisms and contaminants into the environment. In-water cleaning with capture capability can help reduce this environmental risk.

Subsea Global Solutions (SGS Diving) has been contracted to demonstrate to Transport Canada the Whale Shark LTD. water treatment system couple with EITHER the Subsea Global Solutions Remora In-Water Capture and Cleaning (IWCC) unit, the Eco-Friendly C-ROV IWCC unit, or handheld IWCC tools. SGS Diving has developed commercially available systems designed to operate in environmentally sensitive areas to support the maritime industries’ need to perform in-water hull cleaning of vessels. The advanced IWCC system minimizes the risk of accidental discharge of invasive aquatic species, particulate, and soluble contaminants from a vessel’s anti-fouling coating. The SGS Diving systems are developed to reclaim spoils and contaminants that may be released from the vessels during the hull cleaning process. The Whale Shark Ltd. water treatment process not only filters out contaminants that may be present as solid particulates, but also extracts soluble biocides that may be present in the contaminants extracted from the vessel prior to returning the processed seawater back to the marine environment.