An independent review panel investigating the deaths of four sailors says it believes the 37-foot sailboat Aegean ran aground April 28 on North Coronado Island off the Mexican coast during the Newport to Ensenada Race.

Officials initially believed the boat was struck and destroyed by a larger ship in the middle of the night. That theory was undercut when a website that tracks boats by GPS showed the Aegean’s course heading straight into the rocky island.

The US Sailing Independent Review announced its findings on Tuesday. The Coast Guard investigation is still open.

Look for a story on the accident in the July issue of Soundings.