For stability calculations made by manufacturers, what weight per person is used?

For stability calculations made by manufacturers, what weight per person is used?

• A. 180 Lbs
• B. 160 Lbs
• C. 140 Lbs
• D. 174 Lbs

Answer: (C)

Stability calculations rely on a standard weight per person to model how passenger loading shifts the vessel’s center of gravity and affects its righting capability. The commonly accepted value used by manufacturers is 140 pounds per person. This figure comes from long-standing industry guidelines and provides a practical, consistent baseline for estimating total occupant mass during design and capacity checks. When calculating, you multiply the number of people aboard by 140 to estimate occupant weight and then add other masses like fuel and gear to see if the vessel meets stability criteria. Using a higher per-person weight would make the calculated stability seem poorer and could unnecessarily limit capacity; using a lower weight would risk overestimating stability. So, the weight per person used in these stability calculations is 140 pounds.

Stability calculations rely on a standard weight per person to model how passenger loading shifts the vessel’s center of gravity and affects its righting capability. The commonly accepted value used by manufacturers is 140 pounds per person. This figure comes from long-standing industry guidelines and provides a practical, consistent baseline for estimating total occupant mass during design and capacity checks. When calculating, you multiply the number of people aboard by 140 to estimate occupant weight and then add other masses like fuel and gear to see if the vessel meets stability criteria. Using a higher per-person weight would make the calculated stability seem poorer and could unnecessarily limit capacity; using a lower weight would risk overestimating stability. So, the weight per person used in these stability calculations is 140 pounds.