 to drown and it's not like when you fall off your bike and you're screaming for help. Wear bright colors of swimsuits. Easily identify you. Never swim alone. Never swim alone because emergencies happen and medical emergencies happen. If you go underwater and you're by yourself, most people don't swim with their cell phones in their hands or in their pocket. Other tips include moderating alcohol intake and having a first aid kit aboard the boat. That's Joel Ulrey reporting.