OSC Marine Group, 16 Rosbur Park, 53 Carlisle Road, Paarden Eiland, Cape Town (2026)

12/06/2026

What kinds of data can ROVs gather during an underwater survey, and how is this data utilised?

Modern Remotely Operated Vehicle (ROV) systems have evolved far beyond simple underwater cameras. Today's survey-class ROVs can collect a wide range of engineering, survey, environmental, measurement, and condition-monitoring data that supports operational decision-making, maintenance planning, regulatory compliance, and long-term asset integrity management.

Depending on the project requirements, ROV surveys may capture:

• High-definition video inspections
• Still image photography
• Sonar imagery and acoustic mapping
• Photogrammetry and digital modelling data
• Ultrasonic thickness measurement support
• Pipeline and subsea infrastructure survey data
• Seabed and route survey information, including multibeam data
• Structural condition assessment data
• Dimensional measurements and monitoring
• Real-time inspection and operational reporting
• Water column sampling and real-time water quality analysis
• Seabed sampling and analysis
• Thermal and current measurement and analysis
• Cathodic protection monitoring and detection

This information can be used to assess the condition of subsea assets, support inspection and maintenance programmes, identify developing issues before they become critical, and improve operational efficiency across offshore and marine projects.

ROV inspection and survey systems continue to play a critical role in offshore energy, marine infrastructure, port operations, subsea construction, pipeline inspection, and asset integrity management by providing accurate, repeatable, and cost-effective data collection in environments where direct human access may be limited or impractical.

Modern ROV systems have evolved beyond simple visual inspection tools and now provide valuable engineering, survey, environmental, measurement, and condition-monitoring data that support operational decision-making, maintenance planning, regulatory compliance, and long-term asset integrity management.

OSC Marine supports clients through advanced ROV inspection and survey services, subsea data acquisition, asset integrity assessments, underwater inspections, and technically aligned marine solutions designed to support safe and efficient offshore operations.

11/06/2026

What are Off-Port Limits (OPL) services in shipping, and when should a vessel consider using them instead of entering port?

Not every vessel needs to enter port to receive essential services.

Off-Port Limits (OPL) services allow vessels to remain offshore while conducting a wide range of operational, logistical, and crew-related activities. By avoiding a port call where appropriate, vessel operators can often reduce delays, minimise costs, and improve overall voyage efficiency.

OPL services are commonly utilised for:

• Crew changes and personnel transfers
• Delivery of stores, provisions, and spares
• Fresh water supply
• Documentation and logistics support
• Cash-to-master services
• Medical evacuations and personnel movements
• Vessel support during waiting periods or voyage schedules

A vessel may consider OPL services when:

• Port entry is not operationally required
• Berth availability is limited
• Time alongside would create unnecessary delays
• Costs associated with entering port outweigh operational benefits
• Crew changes or logistics support are required during transit

The suitability of OPL operations depends on vessel schedules, weather conditions, regulatory requirements, cargo operations, and the specific services required.

At OSC Marine, our OPL division supports vessels operating off the South African coast through coordinated offshore logistics solutions designed to keep operations moving safely and efficiently.

10/06/2026

Can an underwater hull inspection in lieu of dry-docking meet class and insurance requirements, and under what conditions is it accepted by classification societies?

Underwater inspections conducted in lieu of dry-docking (UWILD) are widely accepted by many classification societies and vessel operators as an alternative survey method under specific conditions.

When approved by Class, an UWILD can allow vessel operators to complete required hull inspections without the cost, operational disruption, and scheduling challenges associated with a traditional dry-docking.

Acceptance of an UWILD is typically subject to:

• Classification society approval
• Vessel age and survey status
• Hull coating condition
• Previous inspection history
• Trading area and operational profile
• Inspection methodology and reporting standards
• Availability of suitable inspection equipment and personnel
• Compliance with class-specific survey requirements

Classification societies may require:

• Detailed underwater visual inspections
• High-definition video and photographic evidence
• Hull condition assessments
• Sea chest and overboard valve inspections
• Rudder and steering gear examinations
• Propeller and stern gear inspections
• Structural condition reporting
• Recommendations for further inspection where required

Depending on vessel type and Class requirements, inspections may be conducted by commercial divers, ROV systems, or a combination of both.

When properly planned and executed, UWILD inspections can help vessel operators:

• Reduce dry-docking costs
• Minimise vessel downtime
• Support planned maintenance programmes
• Maintain class compliance
• Improve asset condition monitoring
• Support insurance and operational requirements

Final acceptance remains subject to the requirements of the vessel's classification society and the survey findings obtained during the inspection.

OSC Marine supports vessel operators through UWILD inspections, underwater surveys, commercial diving operations, ROV inspection capability, hull condition assessments, and technically aligned marine inspection solutions designed to support class compliance, operational efficiency, and long-term asset integrity.

08/06/2026

Its World Oceans Day

***************

The ocean underpins global trade, energy, infrastructure, and life itself.

For the maritime industry, it is not only an operating environment — it is a responsibility.

From vessel maintenance and subsea operations to environmental compliance and sustainable practices, every action below the waterline has an impact above it.

At OSC Marine, we recognise the importance of responsible operations — supporting vessel performance while aligning with environmental expectations and evolving global standards.

Today is a reminder that protecting the ocean is not separate from operations — it is part of doing them properly.

08/06/2026

How do ROV inspections help reduce risk and project delay compared to traditional diver operations?

Remotely Operated Vehicle (ROV) inspections are increasingly used across offshore, marine, and subsea industries to perform underwater inspections, surveys, and condition assessments while reducing operational risk exposure and minimising vessel or asset project delay.

While commercial divers remain essential for many underwater intervention, repair, and installation tasks, certain subsea environments and operational conditions can increase complexity, risk, and operational limitations.

ROV inspections allow underwater inspections and surveys to be carried out without direct human exposure to hazardous subsea environments.

ROV-based inspection operations are commonly used for:
• Deepwater inspections
• Pipeline and subsea infrastructure surveys
• Mooring and anchoring inspections
• UWILD inspections
• Structural condition assessments
• Low visibility subsea inspections
• Offshore energy infrastructure surveys
• Hazardous or confined underwater environments

Compared to traditional diver operations, ROV inspections can help:
• Reduce diver exposure to hazardous conditions
• Minimise operational project delay
• Reduce vessel standby time
• Improve inspection efficiency
• Support real-time subsea monitoring and reporting
• Access deeper or higher-risk environments
• Support continuous offshore operations in certain conditions

Modern ROV systems may also incorporate:
• HD video inspections
• Sonar imaging
• Photogrammetry and digital modelling
• Ultrasonic testing support
• Real-time data capture and reporting
• Subsea measurement and monitoring systems

Commercial diving operations remain critical where physical underwater intervention, repair work, installation support, or complex manual subsea tasks are required.

Selecting between diver operations and ROV deployment depends on water depth, operational risk, environmental conditions, project scope, inspection requirements, and overall operational objectives.

OSC Marine supports offshore and marine operations through commercial diving capability, ROV inspection systems, subsea surveys, underwater inspections, and technically aligned marine intervention solutions.

05/06/2026

ISM & DIVING OPERATIONS | PART 10 – Internal Audits and Continuous Improvement Covering Diving

The ISM Code requires internal safety audits at intervals not exceeding 12 months to verify compliance with the Safety Management System (SMS).

The 2023 Diving Code further recommends verification of alignment between the vessel SMS and the Diving Organisation SMS before issuance of a DUSC Part I.

For vessels supporting diving operations, audits should include diving activities, integration requirements, critical systems, documentation, and operational controls.

What OSC Marine Did

As part of our implementation programme we:

• Implemented FMECA for diving systems
• Extended FMECA to vessel support systems
• Introduced annual testing of critical systems
• Incorporated risk mitigation requirements into personnel familiarisation and competency processes

Although this requirement is often viewed as "just an audit", the process provides an opportunity to strengthen safety management, verify compliance, identify improvement opportunities, and ensure diving operations are fully integrated into the vessel SMS.

Continuous improvement starts with effective verification.
We continue to share the lessons learned from our implementation of the 2023 International Code of Safety for Diving Operations (MSC.548(107)) and welcome industry feedback and experiences.

[email protected]

03/06/2026

Are in-water hull cleanings permitted by port authorities, and how do service providers ensure compliance with environmental regulations during cleaning?

In-water hull cleaning operations are regulated activities in many ports and coastal regions due to environmental concerns relating to biofouling removal, water quality management, and the transfer of invasive marine species.

While many port authorities permit underwater hull cleaning operations, approvals are often subject to strict operational, environmental, and reporting requirements which vary between ports and jurisdictions.

Environmental compliance during hull cleaning operations has become increasingly important as regulators focus on:
• Biofouling management
• Prevention of invasive marine species transfer
• Water contamination control
• Coating and debris management
• Environmental protection protocols
• Operational safety within active port environments

Professional hull cleaning contractors assist vessel operators through:
• Environmentally aligned cleaning methodologies
• Biofouling assessments and condition reporting
• Underwater inspections and photographic documentation
• Operational planning and risk assessments
• Coordination with port authorities and vessel representatives
• Hull cleaning and propeller polishing services

Effective biofouling management remains a vessel management responsibility, with underwater inspections, cleaning programmes, and maintenance planning forming part of a wider asset integrity and compliance strategy.

OSC Marine supports vessel operators through environmentally aligned underwater hull cleaning, propeller polishing, underwater inspections, and technically supported marine maintenance services designed to support operational efficiency, regulatory compliance, and long-term vessel performance.

02/06/2026

How can a subsea service provider minimise Project delays when performing underwater inspections or repairs on critical oil & gas infrastructure?

In offshore oil & gas operations, unplanned project delays can result in significant operational losses, production delays, and increased project costs.
Subsea inspections, maintenance, and underwater intervention activities therefore need to be carefully planned and executed to minimise operational disruption while maintaining safety and asset integrity.

Project delays can often be reduced through:
-Having the right mix of experienced personnel in the project team
-Detailed pre-project planning and engineering reviews
-Correct inspection, repair and construction methodology selection
-Use of ROV systems for rapid assessment and monitoring
-Simultaneous operations planning (SIMOPS)
-Real-time subsea reporting and digital inspection data
-Early defect identification and condition monitoring
-Proper mobilisation planning and equipment readiness
-Clear and authoritative integration between offshore crews, vessel operators, and subsea teams

Depending on operational requirements, subsea work scopes may be carried out using commercial diving teams, ROV systems, or a combination of both.
ROV systems allow inspections and repairs to be completed efficiently in challenging or deepwater environments while reducing unnecessary interruption to offshore operations. Commercial diving teams remain essential where direct physical intervention, repairs, installation support, or complex underwater maintenance activities are required.

Efficient subsea inspection, repairs and maintenance planning help offshore operators:
-Reduce project delays
-Improve maintenance scheduling
-Support asset integrity management
-Reduce emergency intervention requirements
-Maintain production continuity and operational efficiency

OSC Marine supports offshore oil & gas operations through commercial diving, ROV inspection capability, underwater intervention support, and technically aligned subsea solutions designed to minimise operational downtime and support long-term asset integrity.

02/06/2026

What permits and regulatory approvals are typically required for conducting underwater construction or repairs in ports and waterways?

Marine civils and underwater construction operations carried out within ports, harbours, waterways, dams, and navigational channels are typically subject to strict operational, environmental, and regulatory controls.

Depending on the project scope, location, and operational environment, underwater construction and repair projects may require coordination with:
-Port and harbour authorities [Including Port Engineers for any Delta Pressure hazards in the Port]
-Marine and environmental regulators
-Vessel traffic and navigation control authorities
-Infrastructure owners and engineering teams
-National Diving regulator
-Dam and Lake water management authorities [Including the Dam Engineers for any Delta Pressure hazards on the Dam]

Marine civils projects commonly require approvals or operational coordination for the following types of underwater construction:
-Underwater inspections and repairs
-Dam and sluice gate maintenance
-Quay wall, dam wall and jetty repairs
-Pipeline and outfall works
-Cathodic protection installations
-Marine infrastructure inspections
-Underwater construction and intervention works

Compliance planning may involve:
-Annual regional Diving licenses and audits
-Day Diving permits and operational approvals
-Method statements and project risk assessments
-Environmental management requirements
-Vessel and navigation coordination
-SIMOPS planning and operational scheduling
-Safety and emergency response procedures
-Engineering and inspection reporting
-Controlled work zone management

Experienced marine civils contractors assist clients by coordinating operational planning, technical documentation, regulatory engagement, and project ex*****on requirements to help ensure underwater works are carried out safely, efficiently, and in accordance with operational and environmental regulations.

Effective planning and compliance management help:
-Minimises chances for personal injury or loss of life
-Reduce operational delays
-Improve project coordination
-Protect infrastructure and waterways
-Reduce environmental risk exposure
-Support safe marine operations

OSC Marine supports marine civils and underwater infrastructure projects through commercial diving operations, underwater inspections, marine construction support, and technically aligned subsea intervention solutions designed for controlled and compliant underwater operations.

29/05/2026

What depths and conditions can ROVs operate in that divers cannot, and when is an ROV deployment necessary?

Remotely Operated Vehicles (ROVs) are now widely used in offshore, marine, and subsea operations as the primary means of completing underwater work scope. Modern subsea structures are specifically designed for ROV only installation and maintenance. All deepwater maintenance tasks are now completed using Work class ROV's and specially designed tooling - managed and delivered by ROV's.

While commercial diving remains a specialised function for many underwater tasks, operational limitations exist due to:
• Water depth and Bottom time restrictions
• Currents and sea conditions
• Visibility limitations
• Confined or hazardous environments with the associated operational risk exposure

ROV systems allow subsea inspections and surveys to be carried out in conditions where diver intervention may be limited, unsafe, or operationally impractical.

ROV deployments are now commonly used for:
• All deepwater infrastructure inspections, repairs and maintenance, including offshore energy and subsea infrastructure assets
• FPSO, FRU or FLNG Mooring and anchoring inspections
• UWILD and IWS hull inspections
• Structural condition assessments
• Hazardous, confined subsea environments with low visibility

Modern ROV systems have become truly incredible and can provide:
• HD visual inspections
• Sonar imaging
• Photogrammetry and digital modelling
• Ultrasonic testing support
• Real-time subsea reporting and monitoring

Commercial divers remain critical where direct physical interaction is required with multiple complex operations needed to enable the work to be completed.

Selecting the correct repair or inspection methodology depends on water depth, operational objectives, environmental conditions, safety considerations, and project scope.

OSC Marine supports offshore and marine operations through our ROV and commercial diving capability, this includes subsea surveys, underwater inspections, and technically aligned marine intervention solutions.

OSC Marine Group

12/06/2026

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29/05/2026

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