Final answer:
Boats that are 16 feet in length or longer are required to carry at least one USCG-approved Type IV throwable device to aid in man-overboard situations. Canoes and kayaks are exempt from this requirement.
Step-by-step explanation:
In the context of boating safety, a Type IV throwable device is a piece of safety equipment that is required on certain types of boats. According to United States Coast Guard (USCG) regulations, every boat that is 16 feet in length or longer must carry at least one USCG-approved Type IV throwable device.
These devices are intended to be thrown to a person in the water to provide buoyancy and help prevent drowning. Examples of Type IV throwable devices include buoyant cushions, ring buoys, and horseshoe buoys. It is worth noting that this requirement does not apply to canoes or kayaks; however, it is always advisable for all boaters to carry safety equipment to enhance their preparedness in an emergency situation.