Shanghai Big Chance Marine Technology Co., Ltd. is based in Shanghai, the largest container port in the world and a major hub for international shipping at the mouth of the Yangtze River, hosting the Yangshan deep-water terminal, the Waigaoqiao container complex and extensive ship-repair facilities along the Huangpu River and the surrounding East China Sea anchorages used for crew change, bunkering and routine maintenance during ordinary commercial calls. The firm specialises in vibration and acoustics measurement work alongside underwater inspection scopes performed by qualified diver-technicians on commercial tonnage calling Shanghai-area berths and the surrounding Yangtze anchorages. The vibration and acoustics practice covers shipborne measurement of structural vibration on main engines, auxiliary engines, shafting and rotating auxiliaries, dynamic balancing of fans and pumps in workshop and onboard environments, hull-borne and airborne noise surveys onboard merchant vessels, and analysis of measurement results against ISO 6954, ISO 2923 and class limit values used in machinery condition-monitoring and habitability assessments. Underwater inspection includes close visual examination of hull plating, sea chests, propellers, rudders and other below-waterline items, with video and photographic documentation prepared in formats accepted by attending classification surveyors. Big Chance Marine Technology holds service supplier recognition by ABS, Bureau Veritas, ClassNK, DNV and Lloyd's Register, allowing vibration, noise and in-water survey records to be considered during periodical, intermediate and special surveys on commercial tonnage trading through the East China Sea and worldwide. Customers include shipowners, ship managers, technical superintendents, shipyards and class surveyors arranging vibration, noise and in-water survey attendance during construction sea-trials, repair periods and routine commercial port calls.