Take, for example, life jackets, more properly known as personal flotation devices. Under Maryland law, children under the age of 13 must wear them while any vessel is underway, and that includes not just motorboats but sailboats, canoes, kayaks and rowboats. Yet in cases of drowning, what percentage of victims were found not to be wearing one? According to the U.S. Coast Guard, that would be 84.5 percent. That’s a problem, particularly given that about three-quarters of boating accident fatalities involve drowning.