NanJing JinLing Inspection Engineering Co., Ltd. supports merchant shipping with a combined offering of tightness testing, in-water survey and non-destructive testing services from a base in Nanjing, Jiangsu province. Ultrasonic hatch cover testing addresses seal performance on bulk carrier, general cargo and multipurpose tonnage, while watertight integrity verification extends to bulkheads, doors, hatches and similar boundaries. Underwater inspection is delivered by diver teams trained to perform in-water surveys covering hull, rudder, propeller, sea-chest and similar items, with video documentation prepared for attending class surveyors so afloat examinations can be accepted in lieu of dry-docking when condition and visibility allow. NDT and remote inspection complements the tightness and in-water scopes with techniques used to evaluate welds, plating and structural details where cracks, corrosion thinning and weld defects need quantifiable evaluation during periodical, intermediate and special surveys. Service approvals from ABS, CCS, DNV and KR evidence that procedures, equipment and qualified personnel meet the criteria these classification societies apply to in-water survey, tightness and NDT contractors. The technical base's location on the Yangtze places the firm within working range of yards and anchorages at Nanjing, Zhenjiang, Yangzhou and downriver to Jiangyin and Nantong, simplifying logistics for vessels visiting these ports or trading along the river. Reports are prepared in formats acceptable to attending surveyors and to owner, manager and superintendent departments, supporting integration into class files and planned maintenance systems. Working with bulk carriers, tankers, container ships, general cargo and multipurpose tonnage trading along the Yangtze River, Nanjing JinLing schedules attendance around port stays, river transits, anchorages and dry-dockings, so tightness, in-water and NDT work can be closed out promptly within available port time and reporting can be aligned with the vessel's survey programme and class file for the upcoming survey cycle.