The SeaLink HR3D T-Node is an in-water telemetry and power repeater engineered for use in SeaLink HR3D towing configurations. Designed to support reliable seismic acquisition operations, the T-Node distributes downlink communication, electrical power, and acoustic data transmission to the connected SeaLink streamers. In addition, each T-Node provides a return power path to adjacent nodes within the array, ensuring continuous system operation and redundancy across the spread.

The T-Node electronics are housed within a pressurized titanium pressure tube designed for harsh offshore environments. The assembly features dual O-ring sealed end caps for enhanced environmental protection and reliability, with a rated crush depth of 1,524 meters. Both ends of the T-Node are equipped with SeaLink 56-contact connectors, providing secure electrical and telemetry interfaces for rapid integration into the seismic streamer network.

SeaLink HR3D systems are commonly deployed in high-resolution and ultra-high-resolution marine seismic survey configurations, where reliable telemetry, power distribution, and low-noise data transmission are critical for accurate subsurface imaging.