Remembering the days of my service in Uncle Sams Misguided Children (read USMC) Out M 151's had a fording kit as Marines specialize in beach landings. Had a snorkel not only for the intake, but for the exhaust as well. The puzzling this is the tops of these snorkels were about 6 inches over the driver's head.
The procedure for getting off LST's?
1. Push the foot throttle down about 1/3 to 1/2
2. Pull out the hand throttle matching main throttle cable extension
3. Stand on the door rail while holding your head above water, steering with your right hand.
...trouble was, more often than not, my Jeep found a hole in the beach approach ~glub glub~