The Maritime and Port Authority of Singapore (MPA) continued to coordinate the search and rescue (SAR) effort involving the Police Coast Guard (PCG), the Republic of Singapore Air Force (RSAF), the Republic of Singapore Navy (RSN) and commercial vessels for the 8 missing crew members of the Mongolian-flagged barge Guo Liang 677. The barge had capsized on 24 July 2013 in Singapore waters about 7 nautical miles north of Horsburgh Lighthouse.