Deep sea clearance! Huahai Communication's full series of deep sea wet plug and play connectors have been successfully tested at sea.

 From October 8th to October 27th, 2025, all series of deep-sea wet pluggable optical electrical connectors independently developed by Hua Hai Communication have successfully completed the sea trial. In the deep-sea environment of the kilometer level, the 12-core optical pluggable connector and the 12-core electrical wet pluggable connector have completed more than 30 pluggings between the plug, socket, and flying wire with stable optical connection and fully achieved the predetermined goals. The whole sea trial process was witnessed on-site by Joe Carless, Senior Consultant of Peritus International, a well- international marine engineering company. The test data show that the products have far exceeded the international industry standards in key performance parameters such as insertion loss and insulation resistance, showing significant technical advantages The sea trial results fully prove that Hua Hai Communication's deep-sea wet pluggable connectors have outstanding performance in optical and electrical signal transmission, deep- high water pressure environment plugging function, adaptability to muddy and sandy environments, and compatibility with heavy construction arms, marking a milestone in the field in our country.

The wet-mate connector is a critical connection device specially designed for the underwater environment. It has the function of direct plugging and unplugging under condition of high water pressure at great depth. It can synchronously achieve stable power supply and high-speed data communication between underwater equipment, providing high-reliability and customized connection solutions many fields such as marine resource development, deep-sea scientific exploration, and marine security. The product supports plugging and unplugging operations directly underwater ("wet" environment) remote-controlled underwater vehicles (ROV) or divers, completely changing the traditional "dry plugging and unplugging" technology that must recover the equipment to the surface for operation The wet-mate connector has significantly improved the modularity and maintainability of deep-sea equipment, greatly reducing the cost and risk of system deployment and maintenance. It has become one the core components to promote the technological upgrade of deep-sea equipment.

The smooth implementation of this sea trial has fully validated the superior product performance of Hua Hai Communication's wet plugand-play connectors. With 16 years of high-reliability R&D, precision manufacturing capabilities, and deep-sea construction experience in the field of transocean submarine cable communication systems, the product R&D of wet plug-and-play connectors has combined innovative structural design, application of high-performance materials, and advanced processes to that they maintain excellent stability and reliability in extreme deep-sea environments and complex construction conditions. The sea trial successfully validated the many excellent characteristics of Hua Hai Communication's range of wet plug-and-play connectors: Outstanding optical and electrical performance: The insertion loss value of the optical wet plug-and-play connector is less than of the international industry standard specification (<0.5dB), effectively extending the transmission distance of optical signals and improving the system margin, supporting more flexible network deployment; the electrical insulation of the electrical wet plug-and-play connector reaches more than five times the international product specification (>10GΩ), with sufficient insulation performance redundancy, which effectively ensures and stable operation in deep-sea high water pressure and ultra-low temperature environments for more than 30 years. High robustness: Even under the condition of using aOV-style trencher with large usage force and low flexibility, Hua Hai Communication's wet plug-and-play connectors can still complete more than thirty plug--play operations and maintain stable operation, showing excellent mechanical endurance and environmental adaptability. Light and easy to use: Made of titanium alloy body and high-performance materials as polyetheretherketone, the overall weight is light, and the requirement for the output force of the underwater manipulator is low, making construction more convenient and efficient. ROV-friendly design: The handle is made of polyurethane material, with a slip-resistant surface treatment and micro-elasticity and high toughness, with strong tolerance capacity, and almost no scratches left, significantly improving the success rate of operation. Highly recognizable color design: The plug and socket adopt a gold-yellow coating, not only enhances the hardness and wear resistance of the titanium alloy surface but also has a high visual recognition in the deep sea dark environment, facilitating construction observation and positioning. Plugin position indicator: The indicator is exquisitely designed and arranged at the top of the socket, which can clearly reflect the plug-in state in the deep sea environment, greatly the accuracy and efficiency of operation confirmation.

Joe Carless, senior advisor of Peritus International, a world-renowned marine engineering company, said: "The deep-sea test ofahai Communication's underwater mating connector has been impressive. The high-frequency and highly stable plugging operation under complex deep-sea conditions has demonstrated its leading technical level the industry, marking that Huahai Communication has the strength to compete with international peers in the field of deep-sea underwater mating connectors." The successful completion of sea trial not only fully validates the performance and high reliability of Huahai Communication's full range of deep-sea underwater mating connectors, but also represents a key breakthrough the field of underwater mating technology, which has been restricted by Europe and the United States for a long time. This significant achievement provides a solid technical support and equipment guarantee for Chinas marine resources development, deep-sea exploration, and marine security, and strongly implements China's "Maritime Power" and "Going to Deep Blue" strategies, inject strong momentum into promoting the high-quality development of China's marine cause and building an independent and controllable deep-sea technology system.