Which of the following is NOT a part of the criteria for defining a boat?

The criteria for defining a boat typically encompass various aspects of its design and intended use. While other aspects such as being constructed to float on water, being used for transportation, and having specific shapes for stability and propulsion are all valid characteristics that help in defining what constitutes a boat, the maximum length of 20 feet is not a universally applicable criterion.

The definition of a boat can vary based on jurisdiction and the specific regulations in place, but length alone does not define a boat. In some contexts, watercraft larger than 20 feet may still be considered boats, while smaller vessels under that length may also qualify. Thus, the maximum length of 20 feet serves as a potentially arbitrary limitation that does not hold true across all definitions and legal interpretations related to boats.