GOSL takes HydroSurv uncrewed vessel for survey support duties offshore Nigeria

HydroSurv has sold an REAV-47 uncrewed surface vessel to Geodetic Offshore Services Ltd. (GOSL) for hydrographic and geophysical survey operations in Nigeria.

Lagos-based GOSL Nigeria performs offshore survey and support services for the country’s oil and gas sector, with operations out of Port Harcourt. Its capabilities include hydrographic surveys, ROV inspection and geophysical survey services.

Projects it has supported include an AUV survey of Shell’s offshore Bonga Field infrastructure, a CP-ROV pipeline survey for ExxonMobil Nigeria, and other survey projects for Chevron and TotalEnergies.

HydroSurv’s battery-hybrid REAV-47 will be fitted with a payload comprising a Ping DSP 3DSS-IDX interferometric sonar alongside an Innomar Compact Parametric Sub-Bottom Profiler.

This configuration, the company said, should allow wide-swath bathymetric mapping and concurrent high-resolution sub-bottom imaging for landfall survey capability on offshore infrastructure projects.

GOSL will operate the vessel both as a standalone survey system and as a mothership. The design for the vessel, which was introduced last year, is an evolution on the company's seagoing USV platform.

It can deliver survey operations for up to 72 hours with a battery-hybrid system comprising a 12-kW Mastervolt battery system and a 4k-W Fischer Panda generator.

GOSL will station the new USV at its base in Port Harcourt. The company's experienced survey team has extensively delivered survey projects for ExxonMobil, Shell, Chevron and TotalEnergies.

In addition to the REAV-47, the company has also acquired a REAV-28 inland multi-purpose USV, a smaller, battery-electric vessel that can operate in diverse environments, including sheltered water operations.