What is included in the criteria for a KIO call based on the acronym BBUMS WORLD?

The correct choice relates to the criteria for issuing a KIO (Knock It Off) call, which is a safety measure used to halt training or practice maneuvers due to perceived danger or risk. The acronym BBUMS WORLD serves as a mnemonic to remember several critical criteria, with "Boundaries/Blind" being one of the central components.

"Boundaries" pertains to the geographical or operational limits within which flying maneuvers should occur. If aircraft are straying beyond established boundaries, or if the training is entering an area not suitable for operations—such as near populated areas or conflicting airspace—a KIO call is warranted.

"Blind" refers to a situation where a pilot cannot see another aircraft within the formation or nearby, creating a potentially hazardous condition. When visual contact is lost, it significantly increases the risk of midair collisions, thus necessitating the immediate cessation of maneuvers through a KIO call.

Together, these concepts underscore the importance of maintaining situational awareness and adhering to operational limits, which are crucial for ensuring safety during formation flying. While the other options may relate to operational considerations, they do not specifically align with the BBUMS WORLD acronym related to the KIO call criteria.