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10 Types of Commercial Diving and Their Applications

10 Types of Commercial Diving and Their Applications From maintaining offshore oil platforms to performing critical underwater repairs on ships and infrastructure, commercial diving plays a vital role in industries operating below the water’s surface. Many marine, energy, construction, and environmental projects rely on highly skilled professionals to complete tasks that cannot be achieved remotely. […]

Hull Cleaning & Biotic Evaluation of Skandi Vitoria

Hull Cleaning & Biotic Evaluation of Skandi Vitoria Location: Saldanha Bay, South AfricaDuration: 4 to 11 June 2022Client: Technip UK LimitedRole: Hull Cleaning Contractor Project Overview OSC Marine was appointed to undertake the underwater hull cleaning and biotic evaluation of the multipurpose vessel Skandi Vitoria at the inner anchorage of Saldanha Bay Harbour. The vessel […]

Pipeline Pigging: Improving Efficiency and Pipeline Integrity

Pipeline Pigging: Improving Efficiency and Pipeline Integrity Pipelines are the backbone of many industries, transporting valuable products over long distances. However, without regular maintenance, pipelines can experience blockages, corrosion, reduced flow efficiency, and costly operational disruptions. This is where pipeline pigging plays a critical role. Whether you’re operating in the oil and gas, marine, petrochemical, […]

Gas-to-Energy Project – FPSO Liza Destiny

Gas-to-Energy Project – FPSO Liza Destiny Location: Offshore Georgetown, GuyanaDuration: July 2024Client: TechnipFMC for ExxonMobilRole: Diving ContractorWater Depth: Approximately 27 mDiving Method: 36% Nitrox divingWork Platform: Bespoke diving platform installed on the FPSO Project Overview OSC Marine was appointed as the diving contractor for subsea installation and pre-commissioning activities supporting the Gas-to-Energy Project on the […]

Different Buoy Mooring Configurations and Their Uses 

Different Buoy Mooring Configurations and Their Uses  Offshore environments are among the most demanding operating conditions in the world. Whether supporting vessel positioning, offshore loading, aquaculture, or marine infrastructure, selecting the right buoy mooring configuration is essential for safety, operational efficiency, and asset protection.  With multiple mooring arrangements available, understanding which configuration is best suited […]

ROV In-Water Survey of FLNG Coral South

ROV In-Water Survey of FLNG Coral South  Location: Offshore Mozambique Duration: October to November 2024 Client: Applus / ENI Mozambique Role: ROV Contractor Water Depth: 0 m to 250 m ROV Supplied: Cougar XTi  Project Overview  OSC Marine successfully completed an extensive remotely operated vehicle survey of FLNG (Floating Liquefied Natural Gas) Coral South offshore Mozambique. The campaign was conducted […]

The Role of Hydroblasting in Corrosion Control and Protective Coatings 

The Role of Hydroblasting in Corrosion Control and Protective Coatings  Corrosion is one of the biggest threats to offshore and marine assets. From vessel hulls and offshore platforms to FPSOs and subsea structures, constant exposure to saltwater, humidity, and harsh operating conditions can rapidly deteriorate metal surfaces, compromising both safety and performance.  The challenge for […]

Intelligent Pigging of 14” SPM Diesel Pipeline

Intelligent Pigging of 14” SPM Diesel Pipeline Location: Mossel Bay, South Africa Duration: 1 week, March 2021 Client: PetroSA Role: Inspection Contractor Pipeline Length: 3.4 km Pipeline Route: Onshore Tank Farm to Offshore SPM PLEM  Project Overview  OSC Marine was appointed as the inspection contractor for the intelligent pigging inspection of a 14-inch diesel pipeline in Mossel Bay, South Africa. […]

Commercial Diving Safety: 10 Best Practices That Protect People and Assets 

Commercial Diving Safety: 10 Best Practices That Protect People and Assets  In offshore environments, safety is not simply a regulatory requirement. It is the foundation of every successful diving operation. From vessel inspections and underwater repairs to subsea construction support, even a minor oversight can result in serious injuries, asset damage, costly delays, or environmental […]

What Is Non-Destructive Testing (NDT) and Why Is It Critical for Offshore Assets? 

What Is Non-Destructive Testing (NDT) and Why Is It Critical for Offshore Assets?  Offshore assets operate in some of the harshest environments on earth. Constant exposure to saltwater, wave action, corrosion, fatigue, and heavy operational loads can gradually weaken critical structures, often without visible signs of damage.  The challenge for operators is identifying defects before […]

SBM CALM Changeout of CO Buoy 760

SBM CALM Changeout of CO Buoy 760  Location: Offshore Tema, Ghana Duration: February 2025 Client: RD Marine for GPMS Role: Diving Contractor Water Depth: Approximately 24 m Supplied: Air diving personnel and equipment  Project Overview  OSC Marine was appointed as the diving contractor for the SBM CALM Buoy changeout offshore Tema, Ghana. The project involved the decoupling and removal of […]

Commercial Diving vs ROV Inspections: Which Is Best for Your Offshore Project? 

Commercial Diving vs ROV Inspections: Which Is Best for Your Offshore Project?  When offshore assets need inspection, maintenance, or repair, choosing the right inspection method can significantly impact safety, efficiency, cost, and project outcomes. Asset owners and operators are often faced with a critical decision: should they deploy a commercial diving team or utilise Remote […]

FPSO Liza Destiny UWILD Valve Replacement

FPSO Liza Destiny UWILD Valve Replacement  Location: Offshore Georgetown, Guyana Duration: July to August 2024 Client: SBM Offshore Role: Diving Contractor Water Depth: 0 m to 25 m  Project Overview  OSC Marine was appointed as the diving contractor for UWILD (Underwater Inspection in Lieu of Drydocking) valve replacement support works on the FPSO (Floating Production, Storage, and Offloading) Liza […]

SINGLE BUOY MOORING

Single Buoy Mooring Systems: Design, Operation and Asset Integrity Considerations  As offshore hydrocarbon developments continue to move into deeper waters and remote environments, efficient export infrastructure remains critical to project viability. Conventional port facilities are often impractical due to water depth, environmental constraints, or distance from shore, creating demand for robust offshore loading solutions.  The […]

Inspection & Thruster Replacement: Drill Ship COSL Prospector

Inspection & Thruster Replacement: Drill Ship COSL Prospector  Project: Fouling Inspection and Thruster Replacement Location: Port of Ngqura, South Africa Duration: 31 March to 16 April 2019 Client: COSL Offshore Management AS Vessel: Drill Ship COSL Prospector  Scope of Work  The project scope included two primary work areas:  OSC Marine supplied experienced commercial diving personnel and air diving equipment […]

Coral Relocation Works, East Africa

Coral Relocation Works, East Africa Location: East Africa, Mozambique Duration: October 2020 to February 2021 Client: Van Oord Gulf FZE Role: Coral Relocation Subcontractor Water Depth: 2m to 25m Diving  Project Overview  OSC Marine was appointed as the coral relocation subcontractor for a major marine environmental works project in East Africa. The project required the safe relocation, placement, and […]

Mooring systems for fluid transfer systems

When bulk liquid fuel tankers transport products (refined or unrefined), they need to make use of a short-term mooring system when loading and offloading the product. The mooring system is either a single point mooring system (SPM) or a conventional buoy mooring system (CBM).  An SPM is anchored, serving its purpose as a single mooring […]

Underwater acoustic measurements can help to assess the impact you’re having on the marine life around you

Along with Quality, Health and Safety, Environment is one of the core pillars here at OSC Marine. Recently, one of our clients asked us to take underwater acoustic measurements at a number of points to assess whether the marine life in the area is being disturbed or is at risk.  Why do we take underwater […]

New IMO Regulations on Diving

The 9th session of the IMO’s Sub-Committee on Ship Systems and Equipment (SSE 9) was held from 27 February to 3 March 2023. SSE 9 finalized the revision of the Code of Safety for Diving Systems to enhance the safety of divers in fixed and portable diving systems. Diving systems safety The Code of Safety […]