Tianjin Marine Electronic Co., Ltd. operates in Tianjin as part of the COSCO Shipping marine-electronics service network coordinated through COSCO (Beijing) Marine Electronic Equipment Co., Ltd. (COSCOMEEC), itself a wholly-owned subsidiary of Yuantong Marine Service Co. Limited. Within that network, Yuantong and COSCOMEEC supervise jointly controlled entities and associates in Guangzhou, Dalian, Shanghai and Tianjin that deliver shipboard radio, navigation and safety-equipment services. The Tianjin entity performs inspection and testing of radio communication equipment, Automatic Identification System testing, voyage data recorder maintenance and annual performance tests, GMDSS equipment service, EPIRB and SART testing, plus underwater hull inspection coordination and non-destructive testing scopes for vessels in the Tianjin and Bohai Rim trade. Its corporate mailbox under coscoshipping.com is consistent with operation as a COSCO Shipping group sister company rather than an independent supplier, and the COSCOMEEC service umbrella explains how Tianjin Marine Electronic carries simultaneous recognitions with ABS, BV, CCS, DNV, KR, LR and RINA. Customers include COSCO-owned tonnage as well as third-party shipowners calling Tianjin Xingang and adjacent Bohai ports.