Ramform Tethys
Built in 2016, Ramform Tethys is a Titan-class seismic vessel designed for large-scale, high-density data acquisition. With a total power capacity of 26.4 megawatts, she delivers the strength, stability and redundancy required for high-performance seismic operations in variable offshore conditions.
Twin engine rooms, fully separated and mutually redundant, power three 6,000 kW controllable pitch propellers. Tethys can tow a full spread of multisensor recording equipment using only two of the three propellers, ensuring continuity of operations even during maintenance or system failure.
She carries 24 streamer reels, with 16 across the main deck and eight in a second row, and features 22 tow points. This configuration allows for both high-volume exploration 3D and high-density 3D or 4D acquisition. Six independent source-handling booms support rapid deployment and recovery, improving safety and making full use of the operational weather window.
Tethys is equipped with steerable sources and streamers, as well as automated gear-handling systems that further increase flexibility and efficiency. Two stern-launched workboats enable safe streamer maintenance in marginal conditions, while both seismic and maritime systems are designed for at-sea servicing. The vessel operates on a 7.5-year dry-docking interval. In standard operations, Tethys typically tows 16 streamers but is fully capable of towing up to 24 when required.
Power & Propulsion
Source Capability
Receiver Technology
Streamer Capacity
Length & Breadth
Draft
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Ramform Titan
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Ramform Atlas
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Ramform Tethys
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Ramform Hyperion
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Ramform Sovereign
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Ramform Vanguard
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Ramform Victory
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Support Vessels
Ramform Titan
T-Class
Ramform Titan
Launched in 2013, Ramform Titan delivers high-capacity seismic acquisition with fast deployment of up to 24 steerable streamers and steerable sources. Fully integrated with GeoStreamer technology and built for redundancy, she offers reliable, high-efficiency performance in a range of offshore environments.
Ramform Atlas
T-Class
Ramform Atlas
Built in 2013, Ramform Atlas supports dense, high-quality seismic acquisition with 24 streamer reels, 22 tow points, and advanced source handling. Fully equipped with GeoStreamer technology, she is engineered for safe and efficient operation in variable offshore conditions.
Ramform Tethys
T-Class
Ramform Tethys
Delivered in 2016, Ramform Tethys features 26.4 MW propulsion, twin engine rooms, and automated handling for continuous operation. With 24 streamer reels and steerable sources, she is built for high-density 3D and 4D seismic surveys in demanding offshore environments.
Ramform Hyperion
T-Class
Ramform Hyperion
Built in 2017, Ramform Hyperion is designed for sustained seismic performance with 24 streamer reels and six source booms. Fully integrated with GeoStreamer technology, she enables efficient acquisition of large-scale 3D and 4D surveys.
Ramform Sovereign
S-Class
Ramform Sovereign
Launched in 2008, Ramform Sovereign is a high-capacity vessel equipped with GeoStreamer technology and capable of towing up to 22 streamers. She features low-emission propulsion, dual engine rooms, and a flexible layout for extended offshore operations.
Ramform Vanguard
V-Class
Ramform Vanguard
Built in 1999, Ramform Vanguard continues to deliver high-density seismic acquisition with full GeoStreamer capability. She is proven in advanced 4D and UHR 3D surveys, making her a reliable platform for complex exploration and offshore wind projects.
Ramform Victory
V-Class
Ramform Victory
Also launched in 1999, Ramform Victory is equipped for advanced seismic operations, towing up to 20 streamers. Outfitted with broadband GeoStreamer technology, she has built a strong record of delivering consistent, high-quality data across global projects.
Support Vessels
Other
Support Vessels
TGS uses modern seismic support vessels for offshore logistics, refueling, and crew changes. Four purpose-built vessels from PF Thor meet TGS specifications, while additional support is provided through long-term agreements with other trusted suppliers for extended offshore operations.