ST. LOUIS (AP) — The National Transportation Safety Board says the Coast Guard has repeatedly ignored safety recommendations that could have made tourist duck boats safer and potentially prevented the tragic deaths of 17 people near Branson.

The NTSB on Wednesday released a “Safety Recommendation Report” on the July 2018 incident, when a Ride the Ducks of Branson boat sank during a sudden and severe storm on Table Rock Lake.

Former World War II amphibious vehicles known as duck boats operate around the country.

The NTSB says that since an Arkansas duck boat accident killed 13 people in 1999, it has repeatedly urged the Coast Guard to require them to be better able to remain afloat when flooded, and to remove impediments to escape.

Coast Guard Lt. Amy Midgett says the Coast Guard has previously issued guidance to duck boat operators aimed at ensuring safety and is launching a new review based on the NTSB recommendations.