Final answer:
Not having enough personal flotation devices constitutes negligence, which refers to the failure to follow safety measures or regulations important in preventing accidents and ensuring safety in water-based activities.
Step-by-step explanation:
Not having enough personal floatation devices is an example of negligence. This term refers to a failure to take proper care in doing something, which includes not adhering to safety measures or regulations designed to prevent accidents and injuries. In the context of water safety, having a sufficient number of personal flotation devices is a legal and ethical requirement to ensure the safety of individuals on board a vessel. Neglecting to have the right amount of flotation devices can lead to dire consequences, including possible drowning situations, should an emergency occur.