On 1 October 2012, at approximately 20:23HKT, the passenger ferries Sea Smooth and Lamma IV collided off Yung Shue Wan, Lamma Island, Hong Kong. The day was the National Day of the People's Republic of China, and one of the ships was headed for the commemorative firework display, scheduled to take place half an hour later. With 39 killed and 92 injured, the incident was the deadliest maritime disaster in Hong Kong since 1971. On 14 February 2015, Sea Smooth's captain Lai Sai-ming was convicted of 39 counts of manslaughter over the deaths, while Lamma IV's captain Chow Chi-wai was acquitted of the same charges by the High Court. Both men were found guilty of endangering the safety of others at sea. On 16 February, Lai and Chow were sentenced to eight years' and nine months' imprisonment respectively.