Visible crew/equipment: When Geena Davis is being dunked in water, you can see an air hose she is breathing out of in one shot. It is when the bad guy is talking, and you see her submerged.
Visible crew/equipment: In the scene where Charlie is tied to the water wheel, she struggles to free her right hand and blood permeates the water. As she reaches to retrieve the gun she inadvertently drops the fake blood packet and it drifts down slowly in the water.
Answer: A 1966 Ford Galaxie-500 XL. There's a website that lists the vehicles used in the movie.