A 10-year-old boy suffered internal injuries after the boat he was a passenger in struck a sandbar just off Barnegat Light on Aug. 16, also injuring his parents and grandparents. Or so went the simulated boating accident drill coordinated by the Barnegat Light First Aid Squad.

The drill, a joint effort with Coast Guard Station Barnegat Light and Sea Tow Central New Jersey, was designed to mimic a mass casualty (defined as an event that overwhelms resources) boating accident with a focus on assessing patients, extricating them from the boat, and…