To prevent damage to dry cargoes, the cargo hold ventilation and dehumidification systems play a key role. In terms of the maintained dew point, what statement is true?

Correct Answer: Option C — The dew point temperature of the cargo hold is normally maintained 10oF below the surface temperature of the cargo or ship structure.

Maintaining the cargo hold dew point 10 degrees Fahrenheit below the surface temperature of the cargo or ship structure prevents condensation. This safety margin ensures moisture will not precipitate onto cold surfaces, protecting dry bulk or break-bulk cargoes.