Tritech International Ltd, [Tritech], announces that Rotech Subsea Ltd [Rotech] has purchased Gemini Narrow Beam Imager (NBI) systems.
The sonars are to be installed in single head or dual head configuration for use on Rotech's RS range of excavation tools and will support the increased volume of work they are securing worldwide in the oil and gas and renewables sectors. The Gemini NBI can communicate over Ethernet or VDSL and for this installation the systems will run in VDSL mode. The Gemini NBI systems will run on the newly introduced Tritech Gemini 72VDC VDSL Interface Unit, which will supply the sonars with sufficient power to operate over a 300m cable. The unit connects to an Ethernet port on a standard PC running the Gemini software.
Rotech Subsea RS excavation tool, as fitted with a Tritech Gemini NBI. Image courtesy of Rotech Group Ltd
The Gemini NBI operates at 620 kHz and has a 1 degree narrow vertical beam to enable users to accurately identify acoustic target positions. Offering high-speed multibeam imaging, the Gemini NBI is ideally suited for trenching and excavation operations in poor visibility conditions as it features a 130° swath and 0.5° horizontal angular resolution providing 10mm range resolution. Control of the Gemini NBI is via the standalone Gemini software package on a Tritech Surface Control Unit (SCU) or on a desktop PC or laptop.
Kevin Cargill, Subsea Operations Manager, Rotech, commented:
“Rotech Subsea has witnessed first-hand the clear imagery of the Gemini NBI which has allowed us to successfully complete both inshore and offshore jobs including a recent harbor clearance where the sonar also provided continuous visualization as we excavated towards the harbor wall. We have also used the Gemini NBI in cable de-burial and post-trenching projects where continuous observation of the task was critical. We are, therefore, confident that the Gemini NBI systems will further enhance the capabilities of our RS range of excavation tools in visibly-challenging environments.”
Scott McLay, Sales Director, Tritech, commented:
“The Gemini NBI has proven to be highly effective at target visualization in low visibility and turbid waters, providing real-time high speed acoustic images. The sale of the Gemini NBI systems to Rotech Subsea demonstrates the market desire for field-proven technology and it is encouraging that despite current industry challenges, there are still opportunities for our customers and our highly reliable technology.”
