Which of the following is NOT a typical characteristic of cargo in tank ships?

In the context of cargo characteristics on tank ships, the correct answer highlights that cargo on these vessels often possesses a variety of hazardous properties. High flammability, potential for combustion, and presence of chemical liquids are typical characteristics of cargoes transported on tank ships, which usually handle liquids that may include oil products, chemicals, and other hazardous materials.

Absence of toxicity is not a typical characteristic of cargo in tank ships because many of the liquids transported can be toxic to varying degrees. The understanding that these materials can be hazardous, flammable, and capable of combustion is crucial for safety and regulatory compliance in maritime operations. Thus, the presence of toxicity is not only common but often a significant concern when it comes to vessel operation and cargo handling.