Final answer:
The 'unit of issue' is not a criteria for segregating cargo, as segregation decisions are based on factors such as hazardous materials, priority, and quantity.
Step-by-step explanation:
The criteria that is not a consideration for segregating cargo is b) Unit of issue. When determining how to segregate cargo, the factors considered usually pertain to the nature of the items being shipped, such as whether they are hazardous materials, the priority of the cargo in the logistical chain, and the quantity of the goods being shipped, which can influence the choice of shipping method and the overall logistics plan. The 'unit of issue' typically refers to the form or amount in which a material is issued or used and does not directly affect how cargo should be segregated for safe and efficient transportation.