GMDSS Annual Testing Providers

Operating from Shanghai as part of the wider Hostmost Group, this entity provides marine electronics installation, repair, survey and after-sales support to ships calling at the Yangtze River Delta. The parent group traces its ori

Headquartered on Nandi East Road in the Panyu district of Guangzhou, Lantek Marine Limited is a Chinese marine electronics service house focused on bridge communication, navigation and safety equipment for ocean-going merchant shi

Operating from Dongguan in Guangdong Province, Legend Marine Technology Co., Ltd is the southern Chinese arm of a marine technical services group active in safety inspection, repair, condition monitoring and maritime consultation

Mackay Marine-China, Inc. is the Chinese unit of Mackay Communications, the long-established American marine electronics and communications group that trades commercially as Mackay Marine and is headquartered in Raleigh, North Car

Established in 1985, Nantong Haiou Life-saving & Protection Equipment Co., Ltd. is a veteran industrial entity within the Chinese maritime safety sector. Based in Nantong, Jiangsu Province—a major hub for China’s shipbuilding and

Nantong Yuecheng Marine Service Co., Ltd operates from Nantong, a Jiangsu Province port city on the north bank of the lower Yangtze that hosts major shipyards, large terminals at the Tongzhou Bay and Rugao deep-water areas and a s

Operating out of Ningbo, China, this company focuses on navigation and communication systems for commercial vessels. For years, Ningbo Electronic Navigation Co., Ltd. (also known as NBTD) has supported the maritime industry by sup

Ningbo Guye Communication Technology is a Ningbo-based radio and electronics service contractor supporting merchant vessels calling at Ningbo-Zhoushan and adjacent ports with annual testing, equipment service and remote inspection

Founded in 1985 and headquartered in Ningbo, Zhejiang Province, Ningbo Hongzhou Electronics Development Co., Ltd. is a long-established Chinese marine electronics manufacturer and service provider focused on shipborne radio, navig

Northrop Grumman Sperry Marine represents a long‑standing presence in the global maritime sector, tracing its roots to the heritage of Sperry Gyrocompass, C. Plath, and Decca, which were brought together in 1997 under a unified ma