NTSB warned in 2002 that canopies on excursion vessels could trap passengers . Records show only two fatal accidents involving amphibious tour boats . Ride 2 students killed in Philadelphia crash in July ; 13 drowned in 1999 sinking in Arkansas . Comment:
NTSB warned in 2002 that canopies on excursion vessels could trap passengers . Records show only two fatal accidents involving amphibious tour boats . 2 students killed in Philadelphia crash in July ; 13 drowned in 1999 sinking in Arkansas . Comment: