What must the ship's capacity in a charter party match?

The correct answer emphasizes the importance of the ship's official registry, which serves as the definitive document detailing its capacity. This capacity includes various metrics, such as gross tonnage and net tonnage, and must be accurate to maintain legal and operational consistency in maritime contracts. Within a 2% error margin, it allows for slight discrepancies that can arise from measurement errors or variations in the ship's design. This standard ensures that both parties in a charter party have a clear understanding of what to expect when it comes to carrying cargo, thus minimizing disputes and ensuring compliance with maritime laws and regulations.