An international law enforcement operation against maritime pollution has revealed hundreds of violations and exposed serious cases of contamination worldwide. Codenamed 30 Days at Sea, the month-long (1 to 31 October) operation saw some 276 law enforcement and environmental agencies across 58 countries detect over 500 offences, including illegal discharges of oil and garbage from vessels, ship-breaking, breaches of ship emissions regulations, and pollution on rivers and land-based runoff to the sea.