KUP 41 Have knowledge of procedures on how the inspections shall be carried out

Thorough and systematic inspections are the cornerstone of maintaining a ship’s safety, seaworthiness, and regulatory compliance. The procedures for conducting these inspections are not arbitrary; they are carefully designed to ensure every critical aspect of the vessel is evaluated within a specific timeframe. Understanding these procedures is paramount for any maritime professional involved in ship operations and maintenance. It equips them with the knowledge to assess the vessel’s condition effectively, identify potential issues, and take proactive measures to prevent accidents and breakdowns.

Inspections

Shipping is a global industry involving many stakeholders who are invested in the safe operation of vessels, encompassing the safety of life, the ship itself, cargo transport, and environmental protection. These interested parties include:

• Flag State (the country where the ship is registered)
• Port State (the country where the ship is visiting)
• Classification Society (organization that sets and maintains technical standards for ships)
• Ship Owner/Operator (responsible for the ship’s management and operation)
• Charterer/Cargo Owner (those who hire or own the cargo on the ship)
• Insurers (covering both Protection & Indemnity and Hull & Machinery)

These stakeholders, with their vested interests in the ship’s safe upkeep and operation, may conduct inspections with little or no notice. Therefore, the ship must always be prepared for such inspections. Some of these inspections are discussed here, while others are covered in relevant topics. Ship owners and management companies implement maintenance management procedures to comply with legal regulations and ensure efficient maintenance operations. Vessel maintenance isn’t just a legal obligation for companies, but also a crucial business necessity.

The International Safety Management (ISM) Code mandates shipping companies to establish procedures and instructions to ensure their ships are maintained and operated in accordance with legal requirements. Additionally, the code’s section 10.2 emphasizes adopting best practices for ship maintenance. The ISM Code excerpt below underscores that the primary responsibility for ensuring a ship’s seaworthiness rests with the shipping company:

Regular inspections serve as a tool for optimal ship maintenance, ensuring that vessels:

1. Comply with regulations: Meet ISM Code standards and other mandatory legal requirements.
2. Maintain commercial value: Preserve their market value, enabling them to secure favorable charter agreements.
3. Fulfill charter obligations: Successfully meet the terms and conditions of their charter contracts.
4. Minimize downtime: Reduce operational interruptions due to breakdowns and repetitive repairs.
5. Have adequate resources: Ensure sufficient trained personnel and materials are available for their specific trade.
6. Optimize resource utilization: Make efficient use of resources without compromising safety.
7. Implement internal controls: Establish mechanisms to minimize anticipated risks.

When inspecting a ship’s structure:

• Look for signs of corrosion: Check for rust stains or bleeding, and chip away corroded areas to assess the extent of damage. For piping, avoid immediate chipping, but mark sections for repair or replacement.
• Evaluate paint quality: Assess the surface preparation, reliability, and expected lifespan of the coating. Look for issues like wrong paint choice, inadequate preparation, excessive coats, improper mixing ratios, or unsuitable tools. Encourage crew to take photos before painting, as fresh paint can conceal existing defects.
• Examine repairs: Evaluate the quality of repairs made by ship staff, checking for alignment, proper fitting, scallop provisions, and welding quality. This is crucial, as poorly executed repairs can lead to stress and damage in other areas.
• Use reference materials: Refer to relevant documents and guidelines during inspections to ensure a comprehensive assessment.
• Critical Structural Areas: These are locations identified through strength calculations, service history, or experience from similar ships, known to be susceptible to cracking, buckling, or corrosion that could compromise the ship’s structural integrity. Details are available from the classification society. These areas must be inspected thoroughly.
• Suspect Areas: Locations with significant corrosion or prone to rapid deterioration. These might include areas with previous damage, repairs, or specific warnings from the classification society.
• Reduced Scantlings Areas: These areas have thinner structural components due to approved corrosion control measures. They need to be checked to ensure the corrosion control is effective, as deterioration can be rapid if it’s not.
• Repaired Damage: If damage caused by third parties during cargo operations has been fixed, review damage reports to confirm the adequacy and appropriateness of the repairs.
• Doublers: These temporary repairs, used to maintain structural integrity until permanent fixes are made, can become points of stress if not properly installed. They also often lack adequate paint, compromising corrosion protection.

Key points to be noted while inspecting a steel tank:

• Overall Condition: Upon entering, assess the general condition of access points, ladders, and paint coatings. Pay attention to rust-prone areas like weld joints. Check for material wastage on access ways and components, and evaluate the paint coating’s effectiveness against corrosion.
• Corrosion Levels: Examine uncoated surfaces for general corrosion, and coated surfaces for any breakdown leading to localized corrosion. Determine steel thickness reduction, considering factors like corrosive gases, temperature fluctuations, and structural flexing, which can shrink plating and supports. Focus on areas near sounding pipes, vents, gauges, internal piping, bilges, tank tops, hatch coamings, bulkheads, and joints.
• Sacrificial Anodes: Check zinc anodes for excessive wear and tear, maintain wastage records, and ensure they are securely attached.
• Damages, Cracks, Deformations: Use adequate lighting to identify deformations or dents. Shadows can reveal buckling or cracks, especially with lighter paint coatings. Use a high-beam torch or string to highlight subtle deformations. Look for buckling caused by overloaded or weakened structures.
• Pitting and Blisters: Check for pitting corrosion in bottom plating, bell-mouth areas, and near suction wells. Look for blisters, which indicate inadequate surface preparation or coating failure.
• Tank Gauging Systems: Inspect gauges, sensors, sounding pipes, and striker plates for functional issues. Check for rust under the tank top near conduits. Manually clear debris from sensors and test their operation. Gauges should be calibrated during major inspections or at manufacturer-specified intervals.
• Safety Devices: Verify the functionality of safety devices like bilge high/low level alarms. These are crucial for early detection of issues like water ingress and should be regularly tested.
• Mud/Sludge Buildup: Remove excess debris before inspection, as it can hide defects and promote corrosion. Wash crude oil tanks and hose down ballast tanks to expose pitting or deformations.
• Cargo Equipment: Conduct leak tests on heating coils using compressed air or steam. Visually inspect pipework and steam traps for faults. Remotely test cargo equipment from the control room and verify operation within the tank. Record any operational irregularities.

Ship officers should regularly inspect the following conditions within ballast tanks:

By adhering to this inspection checklist, ship officers can proactively identify and address corrosion and structural issues within ballast tanks, ensuring their long-term integrity and the vessel’s overall safety. During inspections, these methods are commonly used:

Ultrasonic gauging: Having a calibrated gauge onboard is helpful for estimating repairs, even though it cannot be used for official class purposes without a certified operator. The latest UTG report should be available for comparison.

Visual inspection: Careful observation, combined with common sense, is a fundamental tool. Thoroughly document findings with videos and photos for later analysis.

Hammer testing: This helps estimate remaining steel thickness and loosen rust, but avoid using it on pressurized pipelines without proper precautions.

Leak tests: Methods like chalk tests, hosing-down, and ultrasonic testing are used on hatch covers, access points, and watertight doors.

Pressure tests: Deck pipelines should be examined under pressure along their entire length, with caution taken when using hammer testing in pressurized states.

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