Final answer:
Chapter 13 of TC 21-305-20 deals with aspects of U.S. Army vehicle operations and training, but a detailed explanation cannot be provided without additional context.
Step-by-step explanation:
Chapter 13 of TC 21-305-20 is a portion of a manual which is typically used to refer to training within the U.S. Army. The TC (Training Circular) outlines procedures and guidelines for operation and training. However, without further context, it's challenging to provide a detailed explanation of the contents of that specific chapter, since TC 21-305-20 covers vehicle operations. Furthermore, you've referenced a page titled '13.10: Chapter 13 Attributions' which seems to be a part of a different work, shared under a CC BY 4.0 license by Deborah Gustlin & Zoe Gustlin, possibly pertaining to a different field, such as an academic book or resource from the ASCCC Open Educational Resources Initiative.