Underwater node

Underwater nodes provide the necessary infrastructure in terms of e.g. electrical power and data connections to continuously operate complex sensor systems having high power consumption on the seafloor.
A stable underwater node technology for shallow water installation (< 300 m) has been developed in the frame of COSYNA (Coastal Observing System for Northern and Artic Seas).
The COSYNA underwater node can be installed with a cable connection to shore up to 30 km offshore for a yearround operation. Thus, it provides the opportunity for a continuous observation of processes in the oceans and coastal areas.
Since 2014 two COSYNA underwater systems are in operation: one is offshore the German island Helgoland, the second one is installed in the Arctic at 79°N offshore Spitsbergen (Svalbard).


Technical data

Power supply from shore

up to 1.000 VDC

Output power

50 – 250W per connection

Data transmission rate

100 Mbit/s up to 1 Gbit/s

Depth rating

underwater mateable connections up to 300 m (greater depths on request)
distance to onshore supply point: up to 10km (greater distances on request)

Underwater node data sheet


⦁ Long-term underwater operation for various applications
⦁ Possibility for different interfaces
⦁ Power supply from shore or for small to medium outputs by battery
⦁ Smart safety concept
⦁ Control and supervision of all relevant measures (voltage, currents, operating temperature, leakage)
⦁ flexible customized and modular setup of complex measurement systems
⦁ Secure access from all over the world
⦁ Each single sensor can be checked and adjusted separately by remote
⦁ Broadband communication of single devices with 100 Mbit/s
⦁ Internal time-server for synchronisation
⦁ Web-based management
⦁ Strict separation of single user access to their corresponding sensors

Options and accessories

⦁ Back-up battery
⦁ ConnectorBox for connection of single sensors or complex sensor systems
⦁ Lander: Frames for perfect sensor mounting and connection to a underwater node or as stand-alone
⦁ Cable
⦁ Sensors