What information is represented in block 15 of AFI Form 487?

Block 15 of the AFI Form 487 is meant to indicate the "Unit Started." This block serves an essential function in the documentation process by capturing the specific moment when a particular electrical unit begins its operation or production phase. It is crucial for tracking purposes, allowing for accurate records of when each unit becomes active. This information is particularly relevant for maintenance, performance assessments, and any necessary operational reports.

While the other options relate to important aspects of the form, such as the type, location, or code of the unit, they do not specifically pertain to the active initiation of a unit’s operations, which is the key focus of block 15. Therefore, identifying what is captured in this block provides a clearer understanding of operational timelines and responsibilities within electrical power production workflows.