What does an 'R' Stamp signify in NBIC context?

• A. Repaired or altered vessel per NBIC
• B. New construction vessel
• C. Routine inspection required
• D. Retrofitted equipment only

Answer: (A)

An NBIC “R” stamp indicates that the vessel has undergone a repair or alteration performed under NBIC rules and has been inspected and stamped by an Authorized Inspector. This mark shows the work was done in accordance with NBIC and ASME requirements, and that the vessel may need re-evaluation or re-rating after the change. It’s not about routine inspections, and it’s not simply about new construction—the stamp specifically flags repairs or alterations. While repairs can include retrofits, the key point is that any repair or alteration work that affects the vessel’s integrity or rating carries this symbol to confirm proper NBIC compliance.