Mer (Tianjin) Marine Service is based in Tianjin and serves merchant shipping calling at Tianjin, Caofeidian and other northern Chinese ports with a combined offering of hull thickness gauging, tightness testing and underwater inspection services. Hull ultrasonic thickness gauging documents the remaining steel of plating, frames, longitudinals and tank boundaries, supporting class survey acceptance of structural condition at intermediate and special survey stages. Ultrasonic hatch cover testing and watertight integrity verification address seal performance on bulk carrier, general cargo and multipurpose tonnage, with reporting prepared so attending surveyors can confirm compliance with applicable rules. Underwater inspection is delivered by trained diver teams supporting in-water surveys covering hull, rudder, propeller, sea-chests and similar items so afloat surveys can be accepted in lieu of dry-docking when conditions allow. Service approvals from ABS, BV, CCS, DNV, KR and RINA evidence that procedures, equipment and qualified personnel meet the criteria these classification societies apply to thickness gauging, tightness and in-water survey contractors. The MER Tianjin team coordinates attendance around port stays, anchorages and dry-dockings, with mobilisation possible to other coastal ports when survey or repair schedules require. Reports are prepared in formats acceptable to attending surveyors and to owner, manager and superintendent departments. The Tianjin base supports rapid mobilisation across the Bohai Sea region, helping owners, managers and crewing offices secure consolidated attendance during single port stays for routine surveys and incident-driven inspections. Working with bulk carriers, tankers, container ships and general cargo tonnage trading through Tianjin, Caofeidian, Qinhuangdao and other Bohai Bay ports, the company's technical office coordinates equipment logistics, qualified personnel and class liaison so attending teams deliver consolidated gauging, tightness and underwater scopes within available port time, aligning documentation with the vessel's survey programme and continuous hull and machinery records.