ROV NDT & INSPECTION

Geo Oceans and parent company Vertech Group are ISO 17205 certified as an NDT inspection body. We hold additional accreditations including ABS Hull Gauging, ABS Remote Inspection Techniques (ROV), ABS In-Water Survey, BV Thickness Measurements of Hull Structures, BV Remote Inspection Techniques, BV In-Water Survey, DNV Close-up Survey, DNV NDT on Classification Projects, DNV Thickness Measuring, DNV In-Water Survey (ROV), Lloyd's Register Remote Inspection Techniques (ROV) and LR Thickness Measurements of Hull Structures.

Our NDT and ROV personnel are highly qualified, skilled and experienced across a wide range of inspection and testing methods, ensuring a best in class outcome and high-quality data and reporting outputs.

CONVENTIONAL SUBSEA NDT

Non-destructive testing (NDT) involves detecting and assessing flaws in materials without causing damage. Geo Oceans has proven experience in subsea NDT inspection planning, advising clients on NDT methods, and providing recommendations and solutions to ensure compliance to international and Australian standards.

Our Mini-ROV systems integrate state-of-the-art cameras, sensors and manipulator technology onto small, powerful and agile ROVs to expand their capabilities to cover a range of conventional NDT such as ultrasonic thickness measurement (UTM) or eddy current inspection (ECI).

  • Improved data – advanced data collection and processing techniques improving repeatability
  • Rapid mobilisation – equipment and personnel can be mobilised on helicopters and commercial planes at short notice
  • Reduced cost – Mini-ROV deployment directly from FPSOs, Modu’s and platforms without need for divers or support vessels
  • Minimal POB – small multi-skilled NDT and ROV teams resulting in minimal POB during inspection campaigns
  • No confined space entries – eliminate the need for commercial diving, manned entry and confined space entry
  • Minimised HSE risk – reduced health & safety risk by eliminating high-risk activities

ROV ADVANCED SUBSEA NDT

Geo Oceans has proven experience in ROV subsea non-destructive testing (NDT) inspection planning, advising clients on NDT methods and providing solutions to ensure compliance to international standards.

Working with our sister company Sonomatic, we can provide a complete collection of ROV subsea advanced NDT solutions. The Mini-ROV tools are operated using topside-controlled actuator arms and our technicians have hundreds of hours of flight experience, being able to maneuver a vehicle with millimetre accuracy.

Our advanced NDT attachments can perform Ultrasonic Testing (UT) and Alternating Current Field Measurement (ACFM) and c-scan corrosion mapping. We can also deploy advanced NDT equipment capable of detailed corrosion mapping in a payload capacity.



  • Alternating Current Field Measurement (ACFM)
  • Flooded Member Detection (FMD)
  • Ultrasonic Thickness Testing (UTT) – semi-automated and automated
  • Computed Tomography (CT)


  • Phased Array Corrosion Mapping.
  • Dynamic Response Spectroscopy (DRS)
  • Pulsed Eddy Current (PEC)
  • Time of Flight Diffraction (screening and welds)

PROJECT EXAMPLES

Subsea Box Section ROV HP Cleaning & Advanced NDT

Geo Oceans completed an asset deployed Mini-ROV inspection that required the removal of 25-year-old marine growth. The scope included high pressure water blasting, rotary brush cleaning, HD visual, ACFM NDT inspections and 3D modelling. The successful completion of all tasks saved the client $2.1 million when compared to conventional non asset deployed methods.

ROV Ballast Tank Repair Planning and Survey

Geo Oceans and Vertech were engaged to plan and execute ballast tank inspections with the Mini-ROV Class Survey System (CSS). The scope included building work packs and repair plans in preparation for dry dock crop and renew works. On-site execution included GVI, CVI, HD video, laser scaling, 3D modelling, high pressure water blasting and approx. 1200 UTM readings.

ROV Tank NDT & RBI Inspections

Geo Oceans and Vertech successfully executed another round of RBI water ballast tank inspections for an oil and gas operator on an FPSO offshore of Western Australia. Four water ballast tanks were inspected across two offshore campaigns using ROV HD GVI, CVI and NDT inspection methods to satisfy the ABS classification requirements for the vessel. Advanced inspection data recording and management systems were developed and implemented for this project, allowing the ROV Inspector to event log, tag and overlay all inspection data.

Offshore Calm Buoy UWILD Inspection

Geo Oceans and Vertech used Mini-ROV systems and a manned entry team to perform a special survey UWILD of a CALM Buoy offshore of Western Australia. The subsea ROV scope included visual GVI and CVI inspections, cleaning, CP, mooring gauging and angle measurements across the CALM buoy hull, moorings, under buoy hose and subsea infrastructure. The topside scope included visual and NDT inspection of all tank, void spaces and hull structures.

ROV Riser & Subsea Infrastructure Inspection

In 2018 Vertech and Geo Oceans successfully completed a high-profile asset deployed Mini-ROV inspection, performing NDT tasks both internal and external to the turret including in extremely small spaces. The scope included proximity and impact CP, ultrasonic and ACFM inspection, 3D modelling, inclinometer measurements and advanced NDT inspections across a range of internal and external structures and features.

ROV ACFM Anomaly Inspection

Geo Oceans and Vertech used Mini-ROV systems, specialised actuator systems and ACFM equipment to measures and map crack indications in water ballast tanks for Australia’s largest oil and gas operator. Prior to mobilisation a desktop 3D modelling exercise was performed to confirm ROV and tooling access to all anomalies, and to facilitate tooling design modifications. Five ballast tanks were surveyed, with the ROVs operated from a workshop module on the FPSO up to 150 m away from the tank entry.

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