Ship husbandry encompasses the inspection, maintenance, cleaning and preservation of a vessel’s hull, underwater structures and essential equipment to ensure safe, efficient and compliant operations.
As dry-docking intervals extend and operational demands increase, many maintenance and inspection activities are now performed while vessels remain in service. This requires experienced, regulation-compliant marine specialists capable of executing underwater work safely and efficiently, without compromising schedules.
OSC Marine provides professional ship husbandry services across South African ports, including Durban, Cape Town, and Saldanha Bay
Our teams deliver:
- Technical expertise in underwater maintenance and inspection
- Full compliance with Port Authority and environmental regulations
- Rapid mobilization and efficient execution
- Detailed reporting and documentation
- Performance-driven solutions that support fuel efficiency and asset longevity
We focus on protecting vessel performance, reducing downtime, and ensuring safe, reliable operations; helping ship owners and technical managers maintain commercial competitiveness in demanding port environments.
OSC Marine – Your trusted partner in ship husbandry & subsea services
OSC Marine delivers coordinated, high performance ship husbandry and subsea services designed to minimise downtime and maximise operational efficiency.
With 24/7 operational availability, our teams provide rapid response to routine service requirements and emergency interventions across South African ports and Off Port Limits (OPL) operations.
Our capabilities include:
- Efficient vessel turnarounds through well-planned, safely executed underwater operations
- 24/7 rapid mobilization for urgent inspections and emergency response
- OPL service capability, reducing port congestion delays and associated costs
- Purpose-selected, maintained equipment to ensure operational reliability and consistent performance
- Class-approved in-water hull inspections in accordance with the International Association of Classification Societies (IACS) requirements
- Competent, certified commercial divers with extensive shipping industry experience
We combine technical expertise, regulatory compliance, and operational agility to deliver safe, efficient and fully documented underwater solutions.
Strong working relationships with ship owners, fleet managers, and port agents allow us to coordinate seamlessly, ensuring minimal disruption to vessel schedules while maintaining the highest safety and performance standards.
Contact us today to discuss how OSC Marine can support your vessel’s operational needs.
Precision marine survey and inspection solutions
Accurate underwater inspection forms the foundation of regulatory compliance and informed maintenance planning.
OSC Marine conducts in-water survey and inspection services in accordance with Classification society requirements, including support for Underwater inspection in Lieu of Dry Docking (UWILD) programmes.
Our survey capabilities include:
- In-water hull inspections aligned with IACS member classification requirements
- Class Surveys with high-definition CCTV recording and structured reporting (including for UWILD)
- Photographic and Video documented surveys
- Pintle and wear down readings
- Non-destructive testing (NDT) inspections
- Damage and condition assessments
- Insurance related inspections
All inspections are supported by controlled documentation, imaging and reporting procedures designed to meet Class, insurer and technical superintendent expectations.
Underwater hull cleaning and propulsion maintenance
Effective hull and propulsion system maintenance is critical to vessel performance, fuel efficiency and regulatory compliance.
OSC Marine provides controlled underwater cleaning and polishing services designed to optimize hydrodynamic efficiency while meeting port authority and environmental requirements.
Our core cleaning services include:
- In-port underwater hull cleaning
- Propeller, shaft and thruster polishing
- Sea chest and intake cleaning
- Removal of marine growth and fouling accumulation
Hull Cleaning operations are conducted using environmentally controlled systems including purpose-built hydraulic capture and filtration systems where required.
Off Port limits (OPL) cleaning operations may be conducted subject to port authority approvals and applicable regulatory permissions.
All cleaning activities are supported by structured reporting and photographic documentation.
Offshore and off port limit (OPL) support services
Beyond port-based ship husbandry, OSC Marine provides offshore and Off-port limit (OPL) underwater support for complex marine and energy sector operations.
Our teams operate in open-water environments where safety management, logistical coordination, and technical precision are critical.
Offshore capabilities include:
- OPL inspection and maintenance operations
- FPSO and FLNG underwater support services
- Semi-submersible and floating asset intervention
- Barge support including fender spacer installation and mooring coordination
- Surface-supplied (air) diving operations
- Mixed gas diving operations
- Saturation diving (SAT) for extended-depth and complex subsea projects
- Remotely Operated Vehicle (ROV) inspection and support.
All offshore works are executed under structured diving management systems with project-specific risk assessments and compliance aligned to applicable marine and energy-sector standards.
Diver expertise supported by ROV technology
Marine services operate continuously in harsh seawater environments where corrosion, impact damage, fouling and mechanical wear are unavoidable. When dry-docking is not immediately practical, controlled underwater intervention becomes essential to maintain structural integrity and operational readiness.
OSC Marine combines certified commercial diving teams with ROV support technology to deliver safe, class-compliant subsea inspection, repair and intervention services.
Our capabilities include:
- Emergency damage assessment and afloat repair solutions
- Underwater structural welding (wet and habitat-supported dry welding)
- Cofferdam installation for controlled external hull repairs
- Propulsion and steering system interventions, including propeller and rudder works
- Stern tube seal and thruster related interventions
- Removal of obstructions and foreign objects from running gear and sea chests
- Anode installation, replacement and hull component maintenance
- Localised coating and structural restoration
Environmental responsibility and controlled hull cleaning
In-water maintenance must be conducted responsibly, particularly within regulated South African port environments. OSC Marine operates in full compliance with Transnet National Ports Authority (TNPA) protocols and applicable environmental regulations governing underwater ship husbandry.
Hull cleaning operations are performed using a hydraulic reclaim brush cart system integrated with waste capture and filtration, significantly reducing the uncontrolled release of marine growth and coating residues.
Our environmental control measures include:
- Capture and filtration of removed biofouling and debris
- Controlled hydraulic cleaning systems designed for regulated port use
- Environmental monitoring during operations
- Pre-approved method statements and risk assessments aligned with TNPA requirements
- Full operational reporting and documentation.
By using reclaim and containment systems, OSC Marine ensures that hull maintenance supports vessel performance while protecting the surrounding marine environment and maintaining regulatory compliance.
Proper hull and propulsion system maintenance improves fuel efficiency, reduces emissions and contributes to a safer vessel operation, delivering both commercial and environmental benefits.
OSC Marine provides compliant, controlled solutions that safeguard your vessel, your schedule, and your environmental obligations.
Commercial advantage of professional ship husbandry
Strategic in-water maintenance allows vessel operators to maintain performance, manage operating costs and reduce disruption to commercial schedules.
When executed using controlled systems and experienced subsea teams, ship husbandry delivers measurable operational and financial benefits.
Key advantages include:
Reduced dry-dock dependence
Well-planned underwater maintenance and inspection can extend intervals between schedule dry-dockings, allowing vessels to remain commercially active for longer periods.
Improved hydrodynamic Performance
Clean hull surfaces and maintained propulsion systems reduce drag, optimize fuel consumption and support consistent vessel speed and manoeuvrability
Cost control through preventative intervention
Routine inspections and targeted repairs identify early signs of wear, limiting escalation into major structural or mechanical failures.
Regulatory compliance and port entry readiness
Maintained hull condition and class-aligned inspections support compliance with port authority and international operational standards.
Environmental and emissions efficiency
Improved hull efficiency contributes to lower fuel consumption and reduced emissions, supporting responsible vessel operation.
Through controlled, class-compliant execution, OSC Marine ensures these benefits are realized without compromising safety or regulatory obligations.
Versatile marine support across commercial and specialised fleets
OSC Marine delivers ship husbandry and subsea services to a broad spectrum of commercial, offshore and government operated vessels calling at South African ports.
Our experience includes:
- Bulk carriers and container vessels
- Tankers and gas carriers
- Offshore support and subsea vessels
- Passenger and cruise vessels
- Harbour craft and specialized marine units
We support both large ocean-going vessels and specialized marine assets, adapting our operational approach to meet vessel-specific and regulatory requirements
Additional vessel classes can be supported upon request.
Frequently Asked Questions:
What is Non-Destructive Testing?
Non‑Destructive Testing (NDT) is a method used to inspect materials, components, or structures without causing damage, allowing them to remain in service while detecting defects such as cracks, corrosion, or weaknesses.
What is NDT in welding?
In welding, NDT refers to techniques used to inspect weld quality without cutting or breaking the joint, ensuring it is free from defects like cracks, porosity, or incomplete fusion.
What is an NDT inspection?
NDT inspection is the process of examining materials or equipment using non‑destructive methods (such as ultrasonic testing, radiography, or magnetic particle testing) to ensure safety and compliance.
What does husbandry mean?
In a marine context, husbandry means the care, maintenance, and management of a vessel, including cleaning, inspection, repairs, and support services to keep it operational.
What is biofoul?
Biofoul (or biofouling) is the accumulation of marine organisms like algae, barnacles, and mussels on a vessel’s hull or underwater structures, which can reduce efficiency and increase fuel consumption.
Can ship husbandry be performed without dry‑docking?
Yes, many ship husbandry activities can be performed while the vessel is in service, using divers or ROVs, eliminating the need for immediate dry‑docking.
How often should ship husbandry be performed?
It depends on operating conditions, but regular maintenance (often every few months) is recommended to prevent buildup, maintain efficiency, and avoid costly repairs.
How quickly can ship husbandry services be arranged?
OSC Marine services can typically be arranged quickly and often within hours to a few days, depending on location and urgency, with rapid mobilisation available in major ports.