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Scrubbers effectively remove sulphur oxide pollution from ship exhaust – yet the environmental impact of the discharge water they produce, and how to manage and regulate it, is sparking controversy.

Why commercial ships carry ballast water on board, and how it affects the marine environment.

The Marine Acoustic Research Station (MARS) project aims to measure the acoustic signature of vessels transiting the St. Lawrence River to help manage the effect of ship noise on marine mammals.

Commercial ships resupplying the remote communities of Canada’s Eastern Arctic face multiple logistical challenges along the way. This year, COVID-19 and the threat it posed to both the ships’ crews and northern communities was another challenge they had to deal with.

“We must remember the premise of using chemical oil dispersants: Diluting the oil from a surface slick into the water column at sea to reduce its concentration to below toxic levels, enhance its degradation rate, and reduce its probability of reaching shore.” – Kenneth Lee

Real-time monitoring shows current vessel status, while simulations predict future behavior.

Onboard noise monitoring, using sensors placed directly on the vessel, offers advantages like real-time data collection during normal operations.

While deep-water acoustic ranges are preferred for standardized vessel noise measurement, they are less accessible than shallow-water ranges.

Accurate underwater noise measurement, using hydrophones and acoustic ranges, is crucial for researchers, regulators, and vessel operators to understand noise impacts on marine life.