The submarine observation network is an in-situ seabed observation network with systematic high-speed communication and power supply capabilities from shore stations to the deep and far sea. After more than ten years of practical commercial operation of international submarine networks, it has been proven to offer high reliability and practicality. It has now been localized in China and features fully independent intellectual property rights.

The submarine observation network consists of shore stations, primary nodes, secondary nodes, SIIMs (Sensor Interface Instrument Modules), and scientific instruments and equipment. It uses a cabled observation network array to conduct long-term, continuous, multi-parameter, large-scale monitoring of specific sea areas, providing scientific data for underwater security, offshore oil and gas development, scientific research, and other marine applications.

Three Major Observation Networks

Nearshore Observation Network
A small observation network deployed close to the coast
It can be deployed by small vessels, using standard telecom cables or lightweight cables, and can support 10–50 instruments operating near the nodes.

Offshore Observation Network
A medium-sized observation network composed of multiple nodes
It can be arranged in linear, tree-shaped, or ring-shaped layouts. The nodes provide power supply and communication for instruments, with instruments located no more than 10 km from the secondary nodes.

Regional Observation Network
An observation network deployed across a large regional area
It can be arranged in linear, tree-shaped, or ring-shaped layouts. Each node provides stable power supply and communication, with instruments located no more than 10 km from the secondary nodes.

Core Equipment Highlights

NODE-3000 Primary Junction Box
It can connect up to 6 devices/SIIMs. Four interfaces can be switched by software between 375V high-power supply and 12V–48V low-voltage power supply. Equipped with intelligent circuit breakers and line insulation monitors, it can automatically cut off and isolate abnormal ports, with redundant design for core components.

MVC-3000 Medium Voltage Converter
Designed for long-distance underwater power supply, it features overvoltage protection, wide-range voltage input, and automatic start-up. It responds to load changes at millisecond level. With line insulation monitoring, it can issue alarms and perform controlled shutdowns to prevent stray-current corrosion.

SIIM-3000SC Sensor Interface Instrument Module
It provides 10 software-configurable interfaces, including 8 low-voltage 12V–48V interfaces and 2 high-voltage 375V interfaces. It supports Ethernet and multiple serial-port protocols, with independent power supply and insulation monitoring for each port. Instruments can be replaced or added without recovering the equipment.

UPS-3000SC Uninterruptible Power Supply
With an operating depth of up to 3000 meters, it is equipped with a 150 kWh redundant battery pack and features intelligent monitoring and charging functions. Key components are designed with redundancy. It can provide continuous power during outages, with a design life of 25 years and a battery maintenance cycle of 5–10 years.