On the eve of Anzac Day commemorations, Royal Australian Navy (RAN) frigate 'HMAS Darwin' seized and destroyed more than one tonne of heroin. The record 1032 kilograms of heroin was discovered on board a dhow in the Indian Ocean, approximately 27 nautical miles east of Mombasa, Kenya. RAN explains that the record 1032 kilograms of heroin was discovered on board a dhow in the Indian Ocean, approximately 27 nautical miles east of Mombasa, Kenya. Late on the 23rd April, HMAS Darwin located a suspicious dhow and deployed her boarding team.