I should have specified that I don't go into moving water. I'm from desert country and know all about that. DDIS... Don't Do It, Stupid!
The water I go through is like small ponds up to about 100'long. These are areas sort of like gullies alongside the tracks. Actually, they're gullies with deeper gullies on the edges. I heard that one driver rolled his Suburban from the central gully into the side gully; it took two wreckers to drag it out, and they had to move the train to do it.
What are 'frame rails'? Is that about as high as the bottom of the door?
Thank you for all the info. This company is more concerned that you know how to do all the paperwork, more than driving: "Here's a key. There's the car that it fits. Drive it."
Sue