Explain the requirements for the classification of a ship, including the role of classification societies in ensuring compliance with safety and construction standards?

flowchart TD
    A["SOLAS II-1/3-1"] --> B["Compliance with classification society rules"]
    B --> C["Plan approval"]
    C --> D["Survey during construction"]
    D --> E["Certificate of Class"]
    E --> F["Periodical surveys"]
    F --> G["Conditions of class"]
    G --> H["Suspension/Withdrawal"]
    H --> I["Flag State notified"]
    I --> J["Statutory certificates affected"]

• Trap: Class is compulsory under SOLAS II-1/3-1 unless flag has equivalent national standards.
• Class certificate runs for FIVE YEARS; automatic suspension if special survey overdue.
• Withdrawal after SIX MONTHS suspension.
• Classification society acts as RECOGNIZED ORGANIZATION (RO) under SOLAS XI-1/1 and RO Code MSC.349(92).
• Administration retains full responsibility for surveys.