What should be assumed for each passenger's weight for stability calculations in passenger ships?

For stability calculations in passenger ships, it is standard practice to assume an average weight for each passenger to ensure safety and compliance with regulations. The assumption of 75 kg with a center of gravity (CoG) of 1.0 m is particularly aligned with industry norms for estimating weight. This standardization helps in making accurate stability assessments, allowing for uniform calculations across various vessels.

Using an average weight of 75 kg reflects a reasonable estimate that accounts for variations in body weight among different passengers, ensuring that stability calculations are conservative enough to maintain safety under varying load conditions. The CoG of 1.0 m represents a typical vertical center of gravity for a seated passenger, which is practical for stability calculations. This average height helps in establishing a consistent point of balance, essential for the ship's overall stability.

Understanding these parameters is crucial for compliance with international maritime safety regulations and for the effective management of a vessel's stability when loaded with passengers. It allows for more predictable ship behavior in terms of buoyancy and stability when maneuvering or in response to environmental conditions at sea.