Why a ship is usually Classed?

1. Plan Approval.
2. Surveys During Construction.
3. Periodical Surveys After Construction. 

Process of classification –

• Builder submits plans for approval to owner specified class
• Plans for approval as per class rules
• A surveyor is in attendance during construction to inspect materials and workmanship.(based on approved plans and rules)
• Upon satisfactory completion of surveys and sea trials, a certificate of class(hull and machinery), is issued and kept on board.(upon approval by Classification Committee)
• Particulars of ship entered in class register and one or more character symbols assigned to it.e.g: *100A1