What is Condition of Class (CoC)?

A Condition of Class (CoC) is a formal requirement or recommendation issued by a classification society after a ship’s survey, stating that certain deficiencies, damages, or issues must be rectified within a specified time frame to maintain the vessel’s class status.

In simple words, it’s a temporary permission to sail with the understanding that a specific problem or deficiency will be corrected by the due date.


Why is a Condition of Class Issued?

A CoC is issued when:

  • The ship has deficiencies or damages that do not immediately threaten safety but need attention.
  • A surveyor notices wear and tear, corrosion, minor cracks, equipment non-compliance, or overdue maintenance during surveys or inspections.
  • The vessel can continue operating but must comply within the given deadline to avoid suspension or withdrawal of class.

What Happens If a Condition of Class Is Not Rectified in Time?

  • The classification society may suspend or withdraw the ship’s class status.
  • Port State Control inspections may detain the vessel.
  • The vessel becomes commercially unattractive, as charterers and insurance companies require a vessel to be in full class.

How Are CoCs Managed?

  • All CoCs are listed in the vessel’s Quarterly Listing or in the class status report.
  • They come with a clear description of the deficiency, assigned due date, and follow-up survey requirement.
  • Once rectified, the owner must notify the class society, and a surveyor will verify and close out the CoC.

Example of a Condition of Class Entry:

CoC No.: COC/OS/2023/04
Description: “Corrosion pitting found on main deck plating, port side, near frame 35. Requires repairs.”
Due Date: 30 June 2024


✅ Key Points to Remember:

  • A CoC is not an immediate safety threat but a mandatory action item.
  • Must be tracked by the owner/operator and closed out within the given time.
  • Failure to comply can result in class suspension and serious commercial implications.

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