What object is required to be on a 15 foot boat?

A 15-foot boat is typically required to have a life jacket for each person on board. Additionally, it must have a sound-producing device, such as a whistle or horn, and a visual distress signal if operating in coastal waters. Depending on the specific regulations of the state or country, other safety equipment like a fire extinguisher and a first aid kit may also be required. Always check local boating regulations for precise requirements.