Which type of mishap involves an injury causing a minimum of one lost workday?

The type of mishap that involves an injury causing a minimum of one lost workday is classified as Class B. This classification indicates that the injury is significant enough to result in a worker being unable to perform their duties for at least one day. It highlights the impact of workplace incidents that, although perhaps not as severe as those classified as Class A, still represent a serious concern for workplace safety and operational efficiency.

In contrast, Class A mishaps involve fatalities or permanent total disability, which are far more serious in nature. Class C mishaps can refer to injuries that result in a recordable or lost day but do not meet the threshold of a Class B incident. Class D generally involves incidents that cause no injury or significant impact on operations. Thus, understanding the criteria and implications of these classifications is crucial for maintaining safety standards and reporting within an aviation or military context.