Re: I would like to know
Just to clarify:
If you are driving on a road that is flooded to a foot or two and there are other vehicles using it, don't go fast just because you are in a Chelsea Tractor - the resulting wave has fucked* the engines of smaller diesel cars and vans that would have been just fine had you not shown up.
If you are crossing a river in the back of beyond in a 4X4, then for sure, do want you your training and experience tells you is best.
* This was the term our mechanic used - I assume it is technical.