d'ROP

Developed by Bibby HydroMap, the innovative and dynamic d’ROP® system delivers revolutionary productivity in shallow water survey and inspection applications

d'ROP is an industry-leading survey ROV solution. Excelling in cable and pipeline tracking, d'ROP significantly reduces survey time and weather exposure whilst accommodating industry standard sensors.

d’ROP® is a dynamic Remotely Operated Survey Platform that borrows and combines technology and operating principles from existing ROVs, ROTVs and systems from the modern day dredging industry. Addressing many of the inherent limitations of compact free-flying ROVs and seabed crawler systems, the d’ROP is ideally suited to precision tracking operations in dynamic coastal environments.

Using proven technology and off-the-shelf components the d’ROP can accommodate multiple sensors, including the Pangeo Sub Bottom Imager (SBI), Teledyne TSS350, high resolution multibeam and a spread of inspection cameras. Subsea positioning is provided by a high specification USBL system, with standard ROV tooling such as a sophisticated onboard motion sensor and obstacle avoidance sonar.

d'ROP is proven in challenging marine environments. 

d’ROP excels in providing precise depth of burial data in those areas where compact ROVs typically struggle with environmental conditions, and work-class ROVs add significant extra expense. When mobilised to Bibby Athena, the system can effectively track cables and pipelines from the very coastal margin to the offshore substation or platform, and offers the ideal solution for interconnector cable tracking. 

“It was very pleasing to see the Bibby Athena carrying out her depth of burial operations so safely, efficiently and to good effect over the Burbo Bank Extension Export Cable. The development of the use of the Dynamic Remotely Operated Survey Platform (d’ROP) with the PanGeo Sub Bottom Imager over the last 2 years has led to a very competent operation and I was pleased to see it utilised effectively for the first time on this project. It was of great benefit to the project to have Bibby be able to present the findings in person to the us at our offices shortly after demobilisation, and even during operations for specific interrogative tasks, for which the Bibby team were very flexible. I look forward to using the setup again on more planned cable depth of burial works.”

Gareth Ellis, Burbo Bank Extension Export Cable Survey Project Manager 

d'ROP offers exceptional station-keeping

The d'ROP is deployed vertically beneath the support vessel, deriving vertical position from a heave-compensated winch and combined LARS, with the on-board thrusters maintaining heading and fine adjustments to the lateral position.

Maintaining a fixed heading and altitude in relation to a survey line, cable or pipeline provides exceptional line-keeping ability in comparison to traditional mid-size ROV systems.

Deployment through the moonpool increases the operational window. This, combined with improved tidal capability, reduces downtime due to environmental conditions considerably in comparison to a traditional free-flying ROV. 

The system has been designed initially for operation from the company’s custom-build survey vessel Bibby Athena. Deployed vertically through the vessel’s moonpool, the system relies upon the support vessel for forward propulsion, a bespoke heave-compensated umbilical winch and combined LARS for its vertical control with the on-board thrusters maintaining heading and fine adjustments to the lateral position.

Providing significantly more thrust than an equivalent-sized ROV, the d’ROP's ability to hold station allows it to remain stationary, operate at slow speed for depth of burial surveying, or track at up to 4 knots for acoustic survey.

Increased automation reduces user input and drives efficiency.  

The system has been designed initially for operation from the company’s custom-build survey vessel Bibby Athena. Deployed vertically through the vessel’s moonpool, the system relies upon the support vessel for forward propulsion, a bespoke heave-compensated umbilical winch and combined LARS for its vertical control with the on-board thrusters maintaining heading and fine adjustments to the lateral position. Deployment and operation is semi-automated, reducing the requirement for human interaction.

Spec Sheet: d'ROP