In addition to the required PFD for each person on board what additional equipment must vessels 16 ft in length or longer except canoes and kayaks have on board?

In addition to the required personal flotation devices (PFDs) for each person on board, vessels 16 feet in length or longer (excluding canoes and kayaks) must also have a sound-producing device, such as a whistle or horn. Additionally, they must carry visual distress signals, such as flares or an orange flag, and a fire extinguisher if the vessel has an enclosed cabin or is equipped with a fuel-burning device. It's important to check local regulations, as additional requirements may vary by state or region.