According to the U.S. Forestry Service, in 2000 there we more 
than 82 million Americans participating in recreational boating, and there are more than 12.7 million boats registered in the United States.
In 2010, the U.S. Coast Guard counted 3499 accidents that involved 564 death and 2935 injuries (head, chest and abdomen trauma and spinal injuries). More than two-thirds of fatal accident victims drowned and 88% were not wearing a life jacket. The most common types of vessels involved in reported accidents were motorboats, personal water crafts (Jet Skis, Wave Runners, Sea-Doos) and cabin motorboats.
Top 10 contributors to boating accidents:
- Operator Inattention
- Improper Lookout
- Operator Inexperience
- Excessive Speed
- Alcohol Use
- Force of Wave/Wake
- Hazardous Waters
- Machinery Failure
- Rule of the Road
- Weather
If you are going boating make sure the captain or person handling the boat is experienced and competent. The captains and crew members should: not drink alcohol, be aware of and follow local weather conditions, make sure passengers wear or have access to personal flotation devices (PDF), and leave a float plan with someone on land in case of emergencies. If you are going to be using a jet ski or other personal watercraft, make sure you know the rules of the water and make sure you are properly trained on usage of the equipment.
Resources:
Boat U.S. Foundation
National Safety Boating Council
North American Safe Boating Campaign
Sea Tow Foundation for Boating Safety and Education
U.S. Coast Guard
