Shenzhen Head Diving Engineering Co., Ltd is a private commercial diving and underwater inspection contractor based in Shekou, Shenzhen, serving merchant shipping, port and offshore clients in the Pearl River Delta and across southern China. Head Diving operates ISO 9001 quality and OHSAS 18001 occupational health and safety management systems and has been a member of the Association of Diving Contractors International (ADCI) since 2015. The team has completed more than one thousand commercial diving assignments, building a reputation for routine in-water hull surveys delivered in lieu of drydocking, propeller, rudder, sea chest and stern-frame video inspection, and underwater hull cleaning and propeller polishing for fuel-efficiency restoration on container ships, tankers and bulk carriers. Engineering divers also handle underwater hull coating repair, blanking of sea chests and overboard discharges, installation of cofferdams and replacement of transducers and speed logs. For statutory work, divers carry out hull ultrasonic thickness gauging to support intermediate and special periodical surveys, ultrasonic hatch cover tightness testing under IACS UR Z17, watertight integrity verification and underwater non-destructive testing including ACFM and magnetic particle inspection on welds and mooring chains. Survey deliverables include high-resolution video, still photography and dimensional reports compiled to the format expected by attending class surveyors. The company is recognised as a service supplier by ABS, Bureau Veritas, CCS, DNV, Korean Register and Lloyd's Register, so the reports issued by its inspectors and divers are accepted for statutory and class verifications at Shekou, Yantian, Guangzhou, Zhuhai, Hong Kong and other regional terminals.